{"title":"Hexagonal Stud Connector Nuts (DIN 6334) - Marine Stainless Steel (A4)","description":"\u003ch1\u003eHexagonal Stud Connector Nuts (DIN 6334) — Marine Stainless Steel A4 (SUS316)\u003c\/h1\u003e\n\n\u003cp\u003eFULLERKREG DIN 6334 hexagonal long coupling nuts in A4 marine-grade stainless steel (SUS316 \/ 1.4401) are the premium choice for demanding environments where superior corrosion resistance is essential. Conforming to the DIN 6334 standard, the nut length is exactly \u003cstrong\u003e3 times the nominal thread diameter (3×d)\u003c\/strong\u003e, providing the extended thread engagement required to reliably join two threaded rods, studs, or anchor bolts end-to-end. The passivated (acid-washed) bright surface finish maximises corrosion resistance and ensures a clean, oxide-free appearance. The addition of 2–3% molybdenum in SUS316 delivers significantly enhanced resistance to chloride-induced pitting and crevice corrosion compared to standard A2 (SUS304), making these coupling nuts the correct specification for marine, offshore, coastal architectural, chemical processing, and food-grade applications. Available in thread sizes M3 through M56.\u003c\/p\u003e\n\n\u003ch2\u003eDimensional Data\u003c\/h2\u003e\n\u003cp\u003eAll dimensions in mm. Nut length m = 3×d (DIN 6334). Tolerances per ISO 4034 \/ DIN 6334. Unit weight (g) is theoretical reference value for SUS316 (density 7.98 g\/cm³).\u003c\/p\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\" style=\"border-collapse:collapse;width:100%;text-align:center;\"\u003e\n  \u003cthead style=\"background-color:#f2f2f2;\"\u003e\n    \u003ctr\u003e\n      \u003cth\u003eThread\u003cbr\u003ed\u003c\/th\u003e\n      \u003cth\u003ePitch\u003cbr\u003e(mm)\u003c\/th\u003e\n      \u003cth\u003eNut Length\u003cbr\u003em = 3×d (mm)\u003c\/th\u003e\n      \u003cth\u003eAcross Flats\u003cbr\u003es (mm)\u003c\/th\u003e\n      \u003cth\u003eAcross Corners\u003cbr\u003ee min (mm)\u003c\/th\u003e\n      \u003cth\u003eUnit Weight\u003cbr\u003e(g\/pc)\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\u003e9.0\u003c\/td\u003e\n\u003ctd\u003e5.50\u003c\/td\u003e\n\u003ctd\u003e6.01\u003c\/td\u003e\n\u003ctd\u003e~0.7\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\u003e12.0\u003c\/td\u003e\n\u003ctd\u003e7.00\u003c\/td\u003e\n\u003ctd\u003e7.66\u003c\/td\u003e\n\u003ctd\u003e~1.6\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\u003e15.0\u003c\/td\u003e\n\u003ctd\u003e8.00\u003c\/td\u003e\n\u003ctd\u003e8.79\u003c\/td\u003e\n\u003ctd\u003e~2.9\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\u003e18.0\u003c\/td\u003e\n\u003ctd\u003e10.00\u003c\/td\u003e\n\u003ctd\u003e11.05\u003c\/td\u003e\n\u003ctd\u003e~5.1\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\u003e24.0\u003c\/td\u003e\n\u003ctd\u003e13.00\u003c\/td\u003e\n\u003ctd\u003e14.38\u003c\/td\u003e\n\u003ctd\u003e~10.6\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\u003e30.0\u003c\/td\u003e\n\u003ctd\u003e16.00\u003c\/td\u003e\n\u003ctd\u003e17.77\u003c\/td\u003e\n\u003ctd\u003e~19.7\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\u003e36.0\u003c\/td\u003e\n\u003ctd\u003e18.00\u003c\/td\u003e\n\u003ctd\u003e20.03\u003c\/td\u003e\n\u003ctd\u003e~32.3\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\u003e42.0\u003c\/td\u003e\n\u003ctd\u003e22.00\u003c\/td\u003e\n\u003ctd\u003e24.49\u003c\/td\u003e\n\u003ctd\u003e~55.5\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\u003e48.0\u003c\/td\u003e\n\u003ctd\u003e24.00\u003c\/td\u003e\n\u003ctd\u003e26.75\u003c\/td\u003e\n\u003ctd\u003e~78.8\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\u003e54.0\u003c\/td\u003e\n\u003ctd\u003e27.00\u003c\/td\u003e\n\u003ctd\u003e29.56\u003c\/td\u003e\n\u003ctd\u003e~109\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\u003e60.0\u003c\/td\u003e\n\u003ctd\u003e30.00\u003c\/td\u003e\n\u003ctd\u003e32.95\u003c\/td\u003e\n\u003ctd\u003e~149\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\u003e66.0\u003c\/td\u003e\n\u003ctd\u003e32.00\u003c\/td\u003e\n\u003ctd\u003e35.03\u003c\/td\u003e\n\u003ctd\u003e~187\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\u003e72.0\u003c\/td\u003e\n\u003ctd\u003e36.00\u003c\/td\u003e\n\u003ctd\u003e39.55\u003c\/td\u003e\n\u003ctd\u003e~257\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM27\u003c\/td\u003e\n\u003ctd\u003e3.0\u003c\/td\u003e\n\u003ctd\u003e81.0\u003c\/td\u003e\n\u003ctd\u003e41.00\u003c\/td\u003e\n\u003ctd\u003e45.20\u003c\/td\u003e\n\u003ctd\u003e~383\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM30\u003c\/td\u003e\n\u003ctd\u003e3.5\u003c\/td\u003e\n\u003ctd\u003e90.0\u003c\/td\u003e\n\u003ctd\u003e46.00\u003c\/td\u003e\n\u003ctd\u003e50.85\u003c\/td\u003e\n\u003ctd\u003e~524\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM33\u003c\/td\u003e\n\u003ctd\u003e3.5\u003c\/td\u003e\n\u003ctd\u003e99.0\u003c\/td\u003e\n\u003ctd\u003e50.00\u003c\/td\u003e\n\u003ctd\u003e55.37\u003c\/td\u003e\n\u003ctd\u003e~685\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM36\u003c\/td\u003e\n\u003ctd\u003e4.0\u003c\/td\u003e\n\u003ctd\u003e108.0\u003c\/td\u003e\n\u003ctd\u003e55.00\u003c\/td\u003e\n\u003ctd\u003e60.79\u003c\/td\u003e\n\u003ctd\u003e~897\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM39\u003c\/td\u003e\n\u003ctd\u003e4.0\u003c\/td\u003e\n\u003ctd\u003e117.0\u003c\/td\u003e\n\u003ctd\u003e60.00\u003c\/td\u003e\n\u003ctd\u003e66.44\u003c\/td\u003e\n\u003ctd\u003e~1159\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM42\u003c\/td\u003e\n\u003ctd\u003e4.5\u003c\/td\u003e\n\u003ctd\u003e126.0\u003c\/td\u003e\n\u003ctd\u003e65.00\u003c\/td\u003e\n\u003ctd\u003e71.30\u003c\/td\u003e\n\u003ctd\u003e~1441\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM45\u003c\/td\u003e\n\u003ctd\u003e4.5\u003c\/td\u003e\n\u003ctd\u003e135.0\u003c\/td\u003e\n\u003ctd\u003e70.00\u003c\/td\u003e\n\u003ctd\u003e76.95\u003c\/td\u003e\n\u003ctd\u003e~1774\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM48\u003c\/td\u003e\n\u003ctd\u003e5.0\u003c\/td\u003e\n\u003ctd\u003e144.0\u003c\/td\u003e\n\u003ctd\u003e75.00\u003c\/td\u003e\n\u003ctd\u003e82.60\u003c\/td\u003e\n\u003ctd\u003e~2146\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM52\u003c\/td\u003e\n\u003ctd\u003e5.0\u003c\/td\u003e\n\u003ctd\u003e156.0\u003c\/td\u003e\n\u003ctd\u003e80.00\u003c\/td\u003e\n\u003ctd\u003e88.25\u003c\/td\u003e\n\u003ctd\u003e~2671\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM56\u003c\/td\u003e\n\u003ctd\u003e5.5\u003c\/td\u003e\n\u003ctd\u003e168.0\u003c\/td\u003e\n\u003ctd\u003e85.00\u003c\/td\u003e\n\u003ctd\u003e93.56\u003c\/td\u003e\n\u003ctd\u003e~3256\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"font-size:0.85em;color:#666;\"\u003e* Nut length m = 3×d per DIN 6334. Across Corners (e) calculated from s × 1.155. Unit weights are theoretical reference values for SUS316 (density 7.98 g\/cm³); actual weights may vary ±5%. Sizes M39 and above may have longer lead times — please enquire.\u003c\/p\u003e\n\n\u003ch2\u003eSelection Guide\u003c\/h2\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\" style=\"border-collapse:collapse;width:100%;text-align:left;\"\u003e\n  \u003cthead style=\"background-color:#f2f2f2;\"\u003e\n    \u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003ctd\u003eDIN 6334\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAlso Known As\u003c\/td\u003e\n\u003ctd\u003eLong Hex Nut, Coupling Nut, Extension Nut, Stud Connector Nut, Barrel Nut\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eMarine Stainless Steel A4 (SUS316 \/ 1.4401)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSurface Treatment\u003c\/td\u003e\n\u003ctd\u003eAcid-washed (Passivated \/ Bright Finish)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eNut Length\u003c\/td\u003e\n\u003ctd\u003e3×d (three times nominal thread diameter)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eThread Type\u003c\/td\u003e\n\u003ctd\u003eMetric coarse thread (ISO 68-1)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eThread Tolerance\u003c\/td\u003e\n\u003ctd\u003e6H\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eProperty Class\u003c\/td\u003e\n\u003ctd\u003eA4-70 (per ISO 3506-2)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eThread Size Range\u003c\/td\u003e\n\u003ctd\u003eM3 – M56\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTensile Strength\u003c\/td\u003e\n\u003ctd\u003e≥ 700 MPa\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHardness\u003c\/td\u003e\n\u003ctd\u003e147–220 HV\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePitting Resistance (PRE)\u003c\/td\u003e\n\u003ctd\u003e≥ 24 (Mo-bearing grade)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-200°C to +400°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMagnetic\u003c\/td\u003e\n\u003ctd\u003eNon-magnetic (annealed condition)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRoHS Compliant\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePackaging\u003c\/td\u003e\n\u003ctd\u003eBulk bag \/ box; custom packaging available\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eStandard Notes\u003c\/h2\u003e\n\u003cp\u003eDIN 6334 specifies hexagonal long nuts with a length equal to 3 times the nominal thread diameter (m = 3×d). This extended length provides significantly greater thread engagement than a standard hex nut, making DIN 6334 coupling nuts the correct choice for joining two externally threaded components — such as threaded rods, studs, or anchor bolts — end-to-end. The A4 (SUS316) grade adds 2–3% molybdenum to the A2 composition, significantly improving resistance to chloride-induced pitting and crevice corrosion, making it the preferred specification for marine, offshore, and chemical environments.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDIN 6334\u003c\/strong\u003e — Hexagon long nuts, metric coarse thread, length = 3×d\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEquivalent \/ related standards:\u003c\/strong\u003e ISO 4033 (hex high nuts), EN 14399-3 (structural)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial grade:\u003c\/strong\u003e A4 per ISO 3506-2 (SUS316 \/ 1.4401)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSurface:\u003c\/strong\u003e Passivated (acid-washed bright finish) — no additional coating\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread:\u003c\/strong\u003e Right-hand, metric coarse, tolerance class 6H\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eKey advantage vs A2:\u003c\/strong\u003e Molybdenum addition provides superior chloride and pitting corrosion resistance — essential for marine and chemical environments\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTypical applications:\u003c\/strong\u003e Marine hardware, offshore structures, coastal architecture, chemical plant piping, food processing equipment, swimming pool structures, desalination plant fastening\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eA4 vs A2 — When to Specify Marine Grade Coupling Nuts\u003c\/h2\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\" style=\"border-collapse:collapse;width:100%;text-align:left;\"\u003e\n  \u003cthead style=\"background-color:#f2f2f2;\"\u003e\n    \u003ctr\u003e\n      \u003cth\u003eApplication Environment\u003c\/th\u003e\n      \u003cth\u003eRecommended Grade\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eIndoor \/ dry \/ light corrosion\u003c\/td\u003e\n\u003ctd\u003eA2 (SUS304)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMarine \/ coastal \/ saltwater exposure\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eA4 (SUS316) ✓\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eChemical processing \/ acids \/ chlorides\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eA4 (SUS316) ✓\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFood \u0026amp; beverage \/ pharmaceutical\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eA4 (SUS316) ✓\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOffshore \/ subsea structures\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eA4 (SUS316) ✓\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSwimming pools \/ desalination\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eA4 (SUS316) ✓\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCoastal architectural \/ facade\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eA4 (SUS316) ✓\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eDIN 6334 vs Standard Hex Nut — Thread Engagement Comparison\u003c\/h2\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\" style=\"border-collapse:collapse;width:100%;text-align:left;\"\u003e\n  \u003cthead style=\"background-color:#f2f2f2;\"\u003e\n    \u003ctr\u003e\n      \u003cth\u003eNut Type\u003c\/th\u003e\n      \u003cth\u003eStandard\u003c\/th\u003e\n      \u003cth\u003eNut Length\u003c\/th\u003e\n      \u003cth\u003eThread Engagement\u003c\/th\u003e\n      \u003cth\u003eTypical Use\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eStandard Hex Nut\u003c\/td\u003e\n\u003ctd\u003eDIN 934 \/ ISO 4032\u003c\/td\u003e\n\u003ctd\u003e~0.8×d\u003c\/td\u003e\n\u003ctd\u003eShort\u003c\/td\u003e\n\u003ctd\u003eSingle bolt\/stud fastening\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHigh Hex Nut\u003c\/td\u003e\n\u003ctd\u003eISO 4033\u003c\/td\u003e\n\u003ctd\u003e~0.9×d\u003c\/td\u003e\n\u003ctd\u003eMedium\u003c\/td\u003e\n\u003ctd\u003eHigher load single fastening\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color:#fff8e1;\"\u003e\n\u003ctd\u003e\u003cstrong\u003eLong Coupling Nut\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eDIN 6334\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e3×d\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eFull engagement both ends\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eRod-to-rod \/ stud-to-stud joining ✓\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eProduct Gallery\u003c\/h2\u003e\n\u003cp\u003eDIN 6334 Hexagonal Long Coupling Nuts — Marine Stainless Steel A4 (SUS316) actual product photos:\u003c\/p\u003e\n\u003ctable border=\"0\" cellpadding=\"8\" cellspacing=\"0\" style=\"width:100%;text-align:center;\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"width:25%;border:1px dashed #ccc;padding:40px 10px;color:#aaa;\"\u003e[ Photo 1 ]\u003c\/td\u003e\n      \u003ctd style=\"width:25%;border:1px dashed #ccc;padding:40px 10px;color:#aaa;\"\u003e[ Photo 2 ]\u003c\/td\u003e\n      \u003ctd style=\"width:25%;border:1px dashed #ccc;padding:40px 10px;color:#aaa;\"\u003e[ Photo 3 ]\u003c\/td\u003e\n      \u003ctd style=\"width:25%;border:1px dashed #ccc;padding:40px 10px;color:#aaa;\"\u003e[ Photo 4 ]\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eChemical Composition — A4 Marine Stainless Steel (SUS316 \/ 1.4401)\u003c\/h2\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\" style=\"border-collapse:collapse;width:100%;text-align:center;\"\u003e\n  \u003cthead style=\"background-color:#f2f2f2;\"\u003e\n    \u003ctr\u003e\n      \u003cth\u003eGrade\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\u003eSUS316 (A4)\u003c\/td\u003e\n      \u003ctd\u003e≤ 0.08\u003c\/td\u003e\n      \u003ctd\u003e≤ 1.00\u003c\/td\u003e\n      \u003ctd\u003e≤ 2.00\u003c\/td\u003e\n      \u003ctd\u003e≤ 0.045\u003c\/td\u003e\n      \u003ctd\u003e≤ 0.030\u003c\/td\u003e\n      \u003ctd\u003e16.0–18.0\u003c\/td\u003e\n      \u003ctd\u003e10.0–14.0\u003c\/td\u003e\n      \u003ctd\u003e2.0–3.0\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"font-size:0.85em;color:#666;\"\u003e* The molybdenum (Mo) content is the key differentiator from A2\/SUS304, providing significantly enhanced resistance to pitting and crevice corrosion in chloride-containing environments. PRE (Pitting Resistance Equivalent) = Cr + 3.3×Mo ≥ 24.\u003c\/p\u003e\n\n\u003ch2\u003eMechanical Properties — A4-70 (ISO 3506-2)\u003c\/h2\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\" style=\"border-collapse:collapse;width:100%;text-align:center;\"\u003e\n  \u003cthead style=\"background-color:#f2f2f2;\"\u003e\n    \u003ctr\u003e\n      \u003cth\u003eProperty Class\u003c\/th\u003e\n\u003cth\u003eProof Load Stress (MPa)\u003c\/th\u003e\n\u003cth\u003eTensile Strength (MPa)\u003c\/th\u003e\n\u003cth\u003eHardness (HV)\u003c\/th\u003e\n\u003cth\u003eMin. Elongation\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eA4-70\u003c\/td\u003e\n\u003ctd\u003e≥ 500\u003c\/td\u003e\n\u003ctd\u003e≥ 700\u003c\/td\u003e\n\u003ctd\u003e147–220\u003c\/td\u003e\n\u003ctd\u003e≥ 40%\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Choose FULLERKREG DIN 6334 Marine Coupling Nuts?\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e🏭 \u003cstrong\u003eFactory Direct\u003c\/strong\u003e — Manufactured in-house with full process control from raw material to finished part\u003c\/li\u003e\n  \u003cli\u003e🌊 \u003cstrong\u003eMo-Bearing Marine Grade\u003c\/strong\u003e — SUS316 with 2–3% Mo delivers superior chloride and pitting corrosion resistance vs standard A2; PRE ≥ 24\u003c\/li\u003e\n  \u003cli\u003e🔗 \u003cstrong\u003eFull Thread Engagement Both Ends\u003c\/strong\u003e — 3×d length ensures maximum load transfer when joining two threaded rods or studs in marine and structural applications\u003c\/li\u003e\n  \u003cli\u003e📐 \u003cstrong\u003eStrict DIN 6334 Compliance\u003c\/strong\u003e — Length precisely 3×d; every dimension and tolerance verified against the standard\u003c\/li\u003e\n  \u003cli\u003e🔬 \u003cstrong\u003eMaterial Certified\u003c\/strong\u003e — Mill test certificates (MTC) available; SUS316 Mo content verified by spectrometer\u003c\/li\u003e\n  \u003cli\u003e📏 \u003cstrong\u003eWide Size Range\u003c\/strong\u003e — M3 through M56 in stock; covers precision instruments to heavy offshore structural applications\u003c\/li\u003e\n  \u003cli\u003e🌡️ \u003cstrong\u003eExtended Temperature Range\u003c\/strong\u003e — Reliable performance from -200°C to +400°C; suitable for cryogenic and elevated-temperature applications\u003c\/li\u003e\n  \u003cli\u003e📦 \u003cstrong\u003eBulk Wholesale Supply\u003c\/strong\u003e — MOQ-friendly pricing tiers; consistent lot quality for production lines\u003c\/li\u003e\n  \u003cli\u003e🚢 \u003cstrong\u003eGlobal Export Experience\u003c\/strong\u003e — Shipped worldwide with proper export documentation and packaging\u003c\/li\u003e\n  \u003cli\u003e💬 \u003cstrong\u003eTechnical Support\u003c\/strong\u003e — Engineering team available for application guidance, custom lengths, and special requirements\u003c\/li\u003e\n\u003c\/ul\u003e","products":[{"product_id":"din6334-a4-m5","title":"M5-0.8*15(s=8) Hexagonal Stud Connector Nuts (DIN 6334) - Marine Stainless Steel (A4)-6400 Pcs per Carton","description":"\u003cp\u003e17\u003c\/p\u003e","brand":"Fullerkreg Fasteners","offers":[{"title":"Default Title","offer_id":44522672554095,"sku":"DIN6334-A4-M5","price":1171.2,"currency_code":"USD","in_stock":true}]},{"product_id":"din6334-a4-m6","title":"M6-1.0*18(s=10) Hexagonal Stud Connector Nuts (DIN 6334) - Marine Stainless Steel (A4)-4000 Pcs per Carton","description":"\u003cp\u003e18\u003c\/p\u003e","brand":"Fullerkreg Fasteners","offers":[{"title":"Default Title","offer_id":44522672586863,"sku":"DIN6334-A4-M6","price":488.0,"currency_code":"USD","in_stock":true}]},{"product_id":"din6334-a4-m8","title":"M8-1.25*24(s=13) Hexagonal Stud Connector Nuts (DIN 6334) - Marine Stainless Steel (A4)-1600 Pcs per Carton","description":"\u003cp\u003e19\u003c\/p\u003e","brand":"Fullerkreg Fasteners","offers":[{"title":"Default Title","offer_id":44522672619631,"sku":"DIN6334-A4-M8","price":326.4,"currency_code":"USD","in_stock":true}]},{"product_id":"din6334-a4-m10","title":"M10-1.5*30(s=17) Hexagonal Stud Connector Nuts (DIN 6334) - Marine Stainless Steel (A4)-800 Pcs per Carton","description":"\u003cp\u003e20\u003c\/p\u003e","brand":"Fullerkreg Fasteners","offers":[{"title":"Default Title","offer_id":44522672652399,"sku":"DIN6334-A4-M10","price":464.0,"currency_code":"USD","in_stock":true}]},{"product_id":"din6334-a4-m12","title":"M12-1.75*36(s=19) Hexagonal Stud Connector Nuts (DIN 6334) - Marine Stainless Steel (A4)-560 Pcs per Carton","description":"\u003cp\u003e21\u003c\/p\u003e","brand":"Fullerkreg Fasteners","offers":[{"title":"Default Title","offer_id":44522672685167,"sku":"DIN6334-A4-M12","price":439.04,"currency_code":"USD","in_stock":true}]}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0054\/6317\/9375\/collections\/DIN_6334_8c465162-fc3c-49ce-b34f-cd166cb67f48.webp?v=1770713162","url":"https:\/\/www.fullerkr.com\/collections\/din6334-a4.oembed","provider":"Fullerkreg Fasteners","version":"1.0","type":"link"}