{"title":"Full Thread Hex Bolts (DIN 933) - High Tensile Stainless Steel (A4-80)","description":"\u003ch1\u003eFull Thread Hex Bolts (DIN 933 \/ GB 5783) — Ultra-High Tensile Marine Stainless Steel A4-80 (SUS316)\u003c\/h1\u003e\n\n\u003cp\u003eFULLERKREG DIN 933 \/ GB 5783 full thread hex bolts in A4-80 grade represent the \u003cstrong\u003epinnacle of stainless steel fastener performance\u003c\/strong\u003e — combining the highest strength class available in ISO 3506-1 (800 MPa minimum tensile strength) with the superior chloride and seawater corrosion resistance of A4 marine stainless steel (SUS316). Achieved through cold working of molybdenum-enhanced austenitic stainless steel and finished with whitened passivation, these bolts are engineered for the most demanding structural applications in aggressive marine, chemical, and offshore environments. The fully threaded shank ensures maximum thread engagement and grip-length flexibility.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eProduct Highlights\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e FULLERKREG\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandards:\u003c\/strong\u003e DIN 933 \/ GB 5783 \/ ISO 4017\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e A4 Marine Stainless Steel (SUS316 \/ X 2 Cr Ni Mo 17-12-2)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProperty Class \/ Strength Grade:\u003c\/strong\u003e A4-80 (Highest Grade — ISO 3506-1)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Type:\u003c\/strong\u003e Full Thread (Fully Threaded Shank)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSurface Treatment:\u003c\/strong\u003e Whitened \u0026amp; Passivated (酸洗钝化)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Type:\u003c\/strong\u003e Hexagon (Hex Head)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSize Range:\u003c\/strong\u003e M3 – M24\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread:\u003c\/strong\u003e Metric coarse thread per ISO 261 \/ DIN 13\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual Advantage:\u003c\/strong\u003e Highest stainless strength (800 MPa) + Best marine corrosion resistance (Mo 2.0–2.5%)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eWhy Choose FULLERKREG DIN 933 A4-80 Full Thread Hex Bolts?\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eA4-80 — the ultimate stainless fastener grade\u003c\/strong\u003e — Rm ≥ 800 MPa, the highest strength class in ISO 3506-1 for stainless steel\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eA4 (SUS316) marine grade\u003c\/strong\u003e — molybdenum-enhanced alloy for superior chloride, seawater, and pitting corrosion resistance\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eBest of both worlds\u003c\/strong\u003e — maximum strength AND maximum marine corrosion resistance in a single fastener\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eFull thread design\u003c\/strong\u003e — maximum thread engagement; ideal for through-bolting and variable grip-length applications\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003ePassivated finish\u003c\/strong\u003e — enhanced chromium-molybdenum oxide passive layer for maximum long-term corrosion protection\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eTriple standard compliance\u003c\/strong\u003e — DIN 933 \/ GB 5783 \/ ISO 4017 for global market acceptance\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eWholesale \u0026amp; bulk supply\u003c\/strong\u003e — available in large quantities for shipyards, offshore contractors, and OEMs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eComplete Grade Comparison — A4-80 vs. All Stainless Grades\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eProperty\u003c\/th\u003e\n      \u003cth\u003eA2-50\u003c\/th\u003e\n      \u003cth\u003eA2-70\u003c\/th\u003e\n      \u003cth\u003eA4-70\u003c\/th\u003e\n      \u003cth\u003eA2-80\u003c\/th\u003e\n      \u003cth\u003eA4-80 — This Product\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTensile Strength (Rm) min.\u003c\/td\u003e\n\u003ctd\u003e500 MPa\u003c\/td\u003e\n\u003ctd\u003e700 MPa\u003c\/td\u003e\n\u003ctd\u003e700 MPa\u003c\/td\u003e\n\u003ctd\u003e800 MPa\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e800 MPa ✅\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eProof Stress (Rp0.2) min.\u003c\/td\u003e\n\u003ctd\u003e210 MPa\u003c\/td\u003e\n\u003ctd\u003e450 MPa\u003c\/td\u003e\n\u003ctd\u003e450 MPa\u003c\/td\u003e\n\u003ctd\u003e600 MPa\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e600 MPa ✅\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eElongation (A) min.\u003c\/td\u003e\n\u003ctd\u003e40%\u003c\/td\u003e\n\u003ctd\u003e20%\u003c\/td\u003e\n\u003ctd\u003e20%\u003c\/td\u003e\n\u003ctd\u003e8%\u003c\/td\u003e\n\u003ctd\u003e8%\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMolybdenum (Mo)\u003c\/td\u003e\n\u003ctd\u003eNone\u003c\/td\u003e\n\u003ctd\u003eNone\u003c\/td\u003e\n\u003ctd\u003e2.0–2.5%\u003c\/td\u003e\n\u003ctd\u003eNone\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e2.0–2.5% ✅\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMarine \/ Chloride Resistance\u003c\/td\u003e\n\u003ctd\u003eModerate\u003c\/td\u003e\n\u003ctd\u003eModerate\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003ctd\u003eModerate\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eExcellent ✅\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eStrength Level\u003c\/td\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003ctd\u003eHigh\u003c\/td\u003e\n\u003ctd\u003eHigh\u003c\/td\u003e\n\u003ctd\u003eUltra-High\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eUltra-High ✅\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBest For\u003c\/td\u003e\n\u003ctd\u003eGeneral use\u003c\/td\u003e\n\u003ctd\u003eStructural\u003c\/td\u003e\n\u003ctd\u003eMarine structural\u003c\/td\u003e\n\u003ctd\u003eHigh-load indoor\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eHeavy marine structural ✅\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eFull Thread (DIN 933) vs. Partial Thread (DIN 931) — Key Differences\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eFeature\u003c\/th\u003e\n      \u003cth\u003eDIN 931 (Partial Thread)\u003c\/th\u003e\n      \u003cth\u003eDIN 933 (Full Thread) — This Product\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eThread Coverage\u003c\/td\u003e\n\u003ctd\u003ePartial — unthreaded shank section\u003c\/td\u003e\n\u003ctd\u003eFull — entire shank threaded ✅\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eGrip Length Flexibility\u003c\/td\u003e\n\u003ctd\u003eFixed by unthreaded shank\u003c\/td\u003e\n\u003ctd\u003eAdjustable — any grip length ✅\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eThread Engagement\u003c\/td\u003e\n\u003ctd\u003eLimited to threaded portion\u003c\/td\u003e\n\u003ctd\u003eMaximum — full shank ✅\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTypical Use\u003c\/td\u003e\n\u003ctd\u003ePrecision clearance-hole bolting\u003c\/td\u003e\n\u003ctd\u003eThrough-bolting, clamping, variable thickness ✅\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eEquivalent Standards\u003c\/td\u003e\n\u003ctd\u003eDIN 931 \/ ISO 4014\u003c\/td\u003e\n\u003ctd\u003eDIN 933 \/ ISO 4017 \/ GB 5783\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eDimensional Specifications — DIN 933 \/ ISO 4017 Full Thread Hex Bolts\u003c\/h2\u003e\n\u003cp\u003eAll dimensions in millimeters (mm). Data strictly referenced from DIN 933 \/ ISO 4017 standard drawings.\u003c\/p\u003e\n\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eThread (d)\u003c\/th\u003e\n      \u003cth\u003ePitch (mm)\u003c\/th\u003e\n      \u003cth\u003es — A\/F (mm)\u003c\/th\u003e\n      \u003cth\u003ee — A\/C (mm)\u003c\/th\u003e\n      \u003cth\u003ek — Head Height (mm)\u003c\/th\u003e\n      \u003cth\u003ed_w min (mm)\u003c\/th\u003e\n      \u003cth\u003eLength Range (mm)\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM3\u003c\/td\u003e\n\u003ctd\u003e0.5\u003c\/td\u003e\n\u003ctd\u003e5.5\u003c\/td\u003e\n\u003ctd\u003e6.01\u003c\/td\u003e\n\u003ctd\u003e2.0\u003c\/td\u003e\n\u003ctd\u003e4.6\u003c\/td\u003e\n\u003ctd\u003e6 – 30\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM4\u003c\/td\u003e\n\u003ctd\u003e0.7\u003c\/td\u003e\n\u003ctd\u003e7\u003c\/td\u003e\n\u003ctd\u003e7.66\u003c\/td\u003e\n\u003ctd\u003e2.8\u003c\/td\u003e\n\u003ctd\u003e5.9\u003c\/td\u003e\n\u003ctd\u003e8 – 40\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM5\u003c\/td\u003e\n\u003ctd\u003e0.8\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003ctd\u003e8.79\u003c\/td\u003e\n\u003ctd\u003e3.5\u003c\/td\u003e\n\u003ctd\u003e6.9\u003c\/td\u003e\n\u003ctd\u003e10 – 50\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM6\u003c\/td\u003e\n\u003ctd\u003e1.0\u003c\/td\u003e\n\u003ctd\u003e10\u003c\/td\u003e\n\u003ctd\u003e11.05\u003c\/td\u003e\n\u003ctd\u003e4.0\u003c\/td\u003e\n\u003ctd\u003e8.9\u003c\/td\u003e\n\u003ctd\u003e10 – 80\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM8\u003c\/td\u003e\n\u003ctd\u003e1.25\u003c\/td\u003e\n\u003ctd\u003e13\u003c\/td\u003e\n\u003ctd\u003e14.38\u003c\/td\u003e\n\u003ctd\u003e5.3\u003c\/td\u003e\n\u003ctd\u003e11.6\u003c\/td\u003e\n\u003ctd\u003e16 – 100\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM10\u003c\/td\u003e\n\u003ctd\u003e1.5\u003c\/td\u003e\n\u003ctd\u003e17\u003c\/td\u003e\n\u003ctd\u003e18.90\u003c\/td\u003e\n\u003ctd\u003e6.4\u003c\/td\u003e\n\u003ctd\u003e14.6\u003c\/td\u003e\n\u003ctd\u003e20 – 120\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM12\u003c\/td\u003e\n\u003ctd\u003e1.75\u003c\/td\u003e\n\u003ctd\u003e19\u003c\/td\u003e\n\u003ctd\u003e21.10\u003c\/td\u003e\n\u003ctd\u003e7.5\u003c\/td\u003e\n\u003ctd\u003e16.6\u003c\/td\u003e\n\u003ctd\u003e25 – 150\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM14\u003c\/td\u003e\n\u003ctd\u003e2.0\u003c\/td\u003e\n\u003ctd\u003e22\u003c\/td\u003e\n\u003ctd\u003e24.49\u003c\/td\u003e\n\u003ctd\u003e8.8\u003c\/td\u003e\n\u003ctd\u003e19.6\u003c\/td\u003e\n\u003ctd\u003e30 – 150\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM16\u003c\/td\u003e\n\u003ctd\u003e2.0\u003c\/td\u003e\n\u003ctd\u003e24\u003c\/td\u003e\n\u003ctd\u003e26.75\u003c\/td\u003e\n\u003ctd\u003e10.0\u003c\/td\u003e\n\u003ctd\u003e22.5\u003c\/td\u003e\n\u003ctd\u003e35 – 200\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM18\u003c\/td\u003e\n\u003ctd\u003e2.5\u003c\/td\u003e\n\u003ctd\u003e27\u003c\/td\u003e\n\u003ctd\u003e30.14\u003c\/td\u003e\n\u003ctd\u003e11.5\u003c\/td\u003e\n\u003ctd\u003e24.9\u003c\/td\u003e\n\u003ctd\u003e40 – 200\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM20\u003c\/td\u003e\n\u003ctd\u003e2.5\u003c\/td\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003ctd\u003e33.53\u003c\/td\u003e\n\u003ctd\u003e12.5\u003c\/td\u003e\n\u003ctd\u003e27.7\u003c\/td\u003e\n\u003ctd\u003e45 – 200\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM22\u003c\/td\u003e\n\u003ctd\u003e2.5\u003c\/td\u003e\n\u003ctd\u003e34\u003c\/td\u003e\n\u003ctd\u003e37.72\u003c\/td\u003e\n\u003ctd\u003e14.0\u003c\/td\u003e\n\u003ctd\u003e31.4\u003c\/td\u003e\n\u003ctd\u003e50 – 200\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM24\u003c\/td\u003e\n\u003ctd\u003e3.0\u003c\/td\u003e\n\u003ctd\u003e36\u003c\/td\u003e\n\u003ctd\u003e39.98\u003c\/td\u003e\n\u003ctd\u003e15.0\u003c\/td\u003e\n\u003ctd\u003e33.3\u003c\/td\u003e\n\u003ctd\u003e50 – 200\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003e* s = Width across flats (A\/F); e = Width across corners (A\/C); k = Head height; d_w = Bearing surface diameter. All dimensions per DIN 933 \/ ISO 4017. For full tolerance tables, refer to the complete standard.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eStandard Length Series — Available Bolt Lengths by Size\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eThread\u003c\/th\u003e\n      \u003cth\u003eStandard Lengths Available (mm)\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM3\u003c\/td\u003e\n\u003ctd\u003e6, 8, 10, 12, 16, 20, 25, 30\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM4\u003c\/td\u003e\n\u003ctd\u003e8, 10, 12, 16, 20, 25, 30, 35, 40\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM5\u003c\/td\u003e\n\u003ctd\u003e10, 12, 16, 20, 25, 30, 35, 40, 45, 50\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM6\u003c\/td\u003e\n\u003ctd\u003e10, 12, 16, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 80\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM8\u003c\/td\u003e\n\u003ctd\u003e16, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 80, 90, 100\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM10\u003c\/td\u003e\n\u003ctd\u003e20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 80, 90, 100, 110, 120\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM12\u003c\/td\u003e\n\u003ctd\u003e25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 80, 90, 100, 110, 120, 130, 140, 150\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM14\u003c\/td\u003e\n\u003ctd\u003e30, 35, 40, 45, 50, 55, 60, 65, 70, 80, 90, 100, 110, 120, 130, 140, 150\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM16\u003c\/td\u003e\n\u003ctd\u003e35, 40, 45, 50, 55, 60, 65, 70, 80, 90, 100, 110, 120, 130, 140, 150, 160, 180, 200\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM20\u003c\/td\u003e\n\u003ctd\u003e45, 50, 55, 60, 65, 70, 80, 90, 100, 110, 120, 130, 140, 150, 160, 180, 200\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM24\u003c\/td\u003e\n\u003ctd\u003e50, 55, 60, 65, 70, 80, 90, 100, 110, 120, 130, 140, 150, 160, 180, 200\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003e* Non-standard lengths available on request. Contact FULLERKREG for custom length requirements.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eMechanical Properties — A4-80 Marine Stainless Steel (ISO 3506-1)\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eProperty\u003c\/th\u003e\n      \u003cth\u003eA4-80 Value\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eProperty Class\u003c\/td\u003e\n\u003ctd\u003eA4-80 (per ISO 3506-1) — Highest Stainless Grade\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTensile Strength (Rm) min.\u003c\/td\u003e\n\u003ctd\u003e800 MPa\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e0.2% Proof Stress (Rp0.2) min.\u003c\/td\u003e\n\u003ctd\u003e600 MPa\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eElongation (A) min.\u003c\/td\u003e\n\u003ctd\u003e8%\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eReduction of Area (Z) min.\u003c\/td\u003e\n\u003ctd\u003e25%\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHardness min.\u003c\/td\u003e\n\u003ctd\u003e250 HV\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHardness max.\u003c\/td\u003e\n\u003ctd\u003e320 HV\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAchievable by\u003c\/td\u003e\n\u003ctd\u003eCold working \/ strain hardening of A4 (SUS316) austenitic stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003e\u003cem\u003e⚠️ Note: A4-80 strength is achieved through cold working (strain hardening) of A4 stainless steel. This significantly increases tensile and proof strength while reducing elongation compared to A4-70. The material remains fully austenitic and retains its superior marine corrosion resistance. Cold-worked A4-80 may exhibit slight magnetic response — this does not affect corrosion resistance.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eMaterial Properties — A4 Marine Stainless Steel (SUS316)\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eProperty\u003c\/th\u003e\n      \u003cth\u003eValue\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMaterial Designation\u003c\/td\u003e\n\u003ctd\u003eA4 \/ SUS316 \/ X 2 Cr Ni Mo 17-12-2\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eUNS No.\u003c\/td\u003e\n\u003ctd\u003eS31600\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCorrosion Resistance\u003c\/td\u003e\n\u003ctd\u003eExcellent — superior to A2 in chloride \u0026amp; marine environments\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMagnetic\u003c\/td\u003e\n\u003ctd\u003eSlightly magnetic after cold working (austenitic base)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e−50°C to +300°C (continuous)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eKey Advantage vs. A2-80\u003c\/td\u003e\n\u003ctd\u003eMolybdenum (Mo 2.0–2.5%) — superior pitting \u0026amp; crevice corrosion resistance in chloride environments\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eChemical Composition — A4 (SUS316) Marine Stainless Steel\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eElement\u003c\/th\u003e\n      \u003cth\u003eC (%)\u003c\/th\u003e\n      \u003cth\u003eSi (%)\u003c\/th\u003e\n      \u003cth\u003eMn (%)\u003c\/th\u003e\n      \u003cth\u003eP (%)\u003c\/th\u003e\n      \u003cth\u003eS (%)\u003c\/th\u003e\n      \u003cth\u003eCr (%)\u003c\/th\u003e\n      \u003cth\u003eNi (%)\u003c\/th\u003e\n      \u003cth\u003eMo (%)\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eA4 \/ X 2 Cr Ni Mo 17-12-2\u003c\/td\u003e\n      \u003ctd\u003e≤ 0.03\u003c\/td\u003e\n      \u003ctd\u003e≤ 1.0\u003c\/td\u003e\n      \u003ctd\u003e≤ 2.0\u003c\/td\u003e\n      \u003ctd\u003e≤ 0.045\u003c\/td\u003e\n      \u003ctd\u003e≤ 0.03\u003c\/td\u003e\n      \u003ctd\u003e16.5–18.5\u003c\/td\u003e\n      \u003ctd\u003e10.0–13.0\u003c\/td\u003e\n      \u003ctd\u003e2.0–2.5\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eThe addition of Molybdenum (Mo 2.0–2.5%) is the defining characteristic of A4\/316 stainless steel, providing significantly enhanced resistance to pitting corrosion in chloride-rich environments such as seawater, de-icing salts, and industrial chemicals — retained even after cold working to A4-80 strength.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eStandard Cross-Reference\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eStandard\u003c\/th\u003e\n      \u003cth\u003eRegion\u003c\/th\u003e\n      \u003cth\u003eDescription\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDIN 933\u003c\/td\u003e\n\u003ctd\u003eGermany \/ Europe\u003c\/td\u003e\n\u003ctd\u003eHexagon head bolts — full thread (metric)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eISO 4017\u003c\/td\u003e\n\u003ctd\u003eInternational\u003c\/td\u003e\n\u003ctd\u003eHexagon head screws — full thread, product grades A and B\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eGB 5783\u003c\/td\u003e\n\u003ctd\u003eChina\u003c\/td\u003e\n\u003ctd\u003eHexagon head bolts — full thread (equivalent to DIN 933)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eISO 3506-1\u003c\/td\u003e\n\u003ctd\u003eInternational\u003c\/td\u003e\n\u003ctd\u003eMechanical properties of stainless steel fasteners — A4-80 grade definition\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eISO 261 \/ DIN 13\u003c\/td\u003e\n\u003ctd\u003eInternational\u003c\/td\u003e\n\u003ctd\u003eMetric coarse thread specification\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eTightening Torque Reference — A4-80 Marine Stainless Steel\u003c\/h2\u003e\n\u003cp\u003eRecommended tightening torques for A4-80 stainless steel hex bolts (metric coarse thread, lubricated, μ = 0.12). Higher proof stress vs. A4-70 allows greater preload at the same torque:\u003c\/p\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eThread\u003c\/th\u003e\n      \u003cth\u003eTorque (N·m) — 75% Proof Load\u003c\/th\u003e\n      \u003cth\u003eClamp Force (kN)\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM3\u003c\/td\u003e\n\u003ctd\u003e0.6\u003c\/td\u003e\n\u003ctd\u003e1.8\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM4\u003c\/td\u003e\n\u003ctd\u003e1.5\u003c\/td\u003e\n\u003ctd\u003e3.4\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM5\u003c\/td\u003e\n\u003ctd\u003e3.0\u003c\/td\u003e\n\u003ctd\u003e5.5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM6\u003c\/td\u003e\n\u003ctd\u003e5.5\u003c\/td\u003e\n\u003ctd\u003e8.0\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM8\u003c\/td\u003e\n\u003ctd\u003e13\u003c\/td\u003e\n\u003ctd\u003e14.5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM10\u003c\/td\u003e\n\u003ctd\u003e27\u003c\/td\u003e\n\u003ctd\u003e23.5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM12\u003c\/td\u003e\n\u003ctd\u003e47\u003c\/td\u003e\n\u003ctd\u003e34.5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM14\u003c\/td\u003e\n\u003ctd\u003e75\u003c\/td\u003e\n\u003ctd\u003e47.0\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM16\u003c\/td\u003e\n\u003ctd\u003e115\u003c\/td\u003e\n\u003ctd\u003e62.0\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM20\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e97.0\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM24\u003c\/td\u003e\n\u003ctd\u003e390\u003c\/td\u003e\n\u003ctd\u003e139.0\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003e* Torque values are for reference only. Actual requirements depend on friction coefficient, lubrication, joint material, and application. Always consult a qualified engineer for safety-critical applications.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eApplication Scenarios\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e⚓ \u003cstrong\u003eOffshore \u0026amp; subsea structures\u003c\/strong\u003e — platform structural connections, subsea equipment fastening requiring maximum strength and seawater resistance\u003c\/li\u003e\n  \u003cli\u003e🏗️ \u003cstrong\u003eShipbuilding \u0026amp; heavy marine engineering\u003c\/strong\u003e — high-load structural bolting in hull, deck, and superstructure in salt-air and seawater environments\u003c\/li\u003e\n  \u003cli\u003e⚡ \u003cstrong\u003eOffshore wind \u0026amp; tidal energy\u003c\/strong\u003e — monopile and jacket structure fastening where both extreme loads and seawater exposure are present\u003c\/li\u003e\n  \u003cli\u003e🏭 \u003cstrong\u003eChemical \u0026amp; petrochemical plants\u003c\/strong\u003e — high-pressure flange connections in chloride-rich, acidic, or caustic marine process environments\u003c\/li\u003e\n  \u003cli\u003e🌊 \u003cstrong\u003eCoastal \u0026amp; port infrastructure\u003c\/strong\u003e — high-load structural connections in jetties, breakwaters, and harbour structures\u003c\/li\u003e\n  \u003cli\u003e🚂 \u003cstrong\u003eRail \u0026amp; transportation in coastal regions\u003c\/strong\u003e — structural fastening requiring both maximum strength and marine corrosion resistance\u003c\/li\u003e\n  \u003cli\u003e🏭 \u003cstrong\u003eDesalination \u0026amp; water treatment plants\u003c\/strong\u003e — high-load connections in high-chloride process environments\u003c\/li\u003e\n  \u003cli\u003e🔧 \u003cstrong\u003eHeavy OEM \u0026amp; machinery in marine environments\u003c\/strong\u003e — maximum preload fastening where both strength and corrosion resistance are non-negotiable\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eProduct Gallery\u003c\/h2\u003e\n\u003cp\u003eFULLERKREG DIN 933 Full Thread Hex Bolts A4-80 Marine Stainless Steel — actual product photos:\u003c\/p\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"width:25%; text-align:center; padding:12px;\"\u003e[Product Photo 1]\u003c\/td\u003e\n      \u003ctd style=\"width:25%; text-align:center; padding:12px;\"\u003e[Product Photo 2]\u003c\/td\u003e\n      \u003ctd style=\"width:25%; text-align:center; padding:12px;\"\u003e[Product Photo 3]\u003c\/td\u003e\n      \u003ctd style=\"width:25%; text-align:center; padding:12px;\"\u003e[Product Photo 4]\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eOrdering \u0026amp; Packaging Information\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackaging:\u003c\/strong\u003e Bulk carton \/ polybag per size and length; custom labeling available for OEM, shipyard, and distributor orders\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMOQ:\u003c\/strong\u003e Contact FULLERKREG sales for wholesale minimum order quantities\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLead Time:\u003c\/strong\u003e Standard stock sizes ship promptly; large-volume orders subject to production schedule\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCertifications:\u003c\/strong\u003e Material test reports (MTR), ISO 3506-1 A4-80 compliance certificates, and third-party inspection reports available on request\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCustom Requirements:\u003c\/strong\u003e Non-standard lengths, special thread forms, and custom markings available — contact us\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What makes A4-80 the ultimate stainless fastener grade?\u003c\/strong\u003e\u003cbr\u003e\nA: A4-80 combines two key advantages: the \u003cstrong\u003ehighest strength class\u003c\/strong\u003e in ISO 3506-1 (Rm ≥ 800 MPa, Rp0.2 ≥ 600 MPa) with the \u003cstrong\u003esuperior marine corrosion resistance\u003c\/strong\u003e of A4 (SUS316) stainless steel containing 2.0–2.5% Molybdenum. No other standard stainless fastener grade offers both maximum strength and maximum marine corrosion resistance simultaneously.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How is A4-80 strength achieved?\u003c\/strong\u003e\u003cbr\u003e\nA: A4-80 strength is achieved through cold working (strain hardening) of A4 (SUS316) austenitic stainless steel. This process increases tensile and proof strength significantly without changing the chemical composition or corrosion resistance of the material.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What is the difference between A4-80 and A4-70?\u003c\/strong\u003e\u003cbr\u003e\nA: Both grades use A4 (SUS316) marine stainless steel. A4-80 has higher tensile strength (800 MPa vs. 700 MPa) and proof stress (600 MPa vs. 450 MPa), achieved through cold working. A4-70 has higher elongation (20% vs. 8%) and is fully non-magnetic. A4-80 is preferred for maximum preload and high-fatigue applications.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Will A4-80 bolts be slightly magnetic?\u003c\/strong\u003e\u003cbr\u003e\nA: Cold-worked A4-80 stainless steel may exhibit a slight magnetic response due to strain-induced martensite transformation. This does not affect corrosion resistance. For strictly non-magnetic applications, specify A4-70 grade bolts instead.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What is the difference between DIN 933 and DIN 931?\u003c\/strong\u003e\u003cbr\u003e\nA: DIN 933 (ISO 4017 \/ GB 5783) specifies \u003cstrong\u003efully threaded\u003c\/strong\u003e hex bolts. DIN 931 (ISO 4014) specifies \u003cstrong\u003epartially threaded\u003c\/strong\u003e hex bolts with an unthreaded shank section. Full thread bolts offer greater grip-length flexibility and maximum thread engagement.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What nuts and washers are compatible?\u003c\/strong\u003e\u003cbr\u003e\nA: Use ISO 4032 \/ DIN 934 hex nuts (A4-70 or A4-80) and ISO 7089 \/ DIN 125 flat washers (A4) for a fully matched marine stainless steel assembly. FULLERKREG supplies the complete range of compatible A4 stainless fasteners.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I get material test reports (MTR)?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes. FULLERKREG provides material test reports and ISO 3506-1 A4-80 compliance certificates upon request for wholesale and OEM orders.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003cp\u003e\u003cem\u003eFULLERKREG — Precision Fasteners to ISO\/DIN\/GB Standards. All technical data is provided for reference. Always verify fastener selection and torque requirements with a qualified engineer for structural and safety-critical applications.\u003c\/em\u003e\u003c\/p\u003e","products":[],"url":"https:\/\/www.fullerkr.com\/collections\/full-thread-hex-bolts-din-933-high-tensile-stainless-steel-a4-80.oembed","provider":"Fullerkreg Fasteners","version":"1.0","type":"link"}