{"title":"DIN 6334 Hex Coupling Nuts - Q195 Low Carbon Steel - Zinc Plated","description":"\u003ch1\u003eDIN 6334 Hex Coupling Nuts — Q195 Low Carbon Steel, Zinc Plated\u003c\/h1\u003e\n\n\u003cp\u003eFULLERKREG DIN 6334 hexagonal long coupling nuts in Q195 low carbon steel with electroplated zinc finish combine the cost-effectiveness of low carbon steel with reliable atmospheric corrosion protection. 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 electroplated zinc (electro-galvanised) coating delivers a bright, uniform silver appearance and provides effective corrosion protection for indoor, sheltered outdoor, and general industrial environments. Q195 low carbon steel ensures excellent weldability and ductility, while the zinc coating meets standard corrosion resistance requirements at the most competitive price point in the DIN 6334 range. 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 DIN 6334. Unit weight (g) is theoretical reference value for Q195 steel (density 7.85 g\/cm³), excluding zinc coating weight.\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~1.5\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~2.7\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~4.9\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~10.3\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~19.2\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~31.5\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~54.2\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~76.9\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~106\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~146\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~182\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~251\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~374\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~512\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~670\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~877\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~1133\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~1409\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~1735\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~2100\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~2612\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~3185\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 Q195 steel (density 7.85 g\/cm³), excluding zinc coating; 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\u003eQ195 Low Carbon Structural Steel (GB\/T 700)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSurface Treatment\u003c\/td\u003e\n\u003ctd\u003eElectroplated Zinc (Electro-Galvanised)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eZinc Coating Thickness\u003c\/td\u003e\n\u003ctd\u003e5–12 μm (standard electro-zinc per ISO 4042)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eZinc Coating Appearance\u003c\/td\u003e\n\u003ctd\u003eBright silver \/ clear passivated\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSalt Spray Resistance\u003c\/td\u003e\n\u003ctd\u003e≥ 72 hours (white rust, per ISO 9227)\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 (after plating)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eProperty Class\u003c\/td\u003e\n\u003ctd\u003eClass 4 (per ISO 898-2)\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≥ 400 MPa\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHardness\u003c\/td\u003e\n\u003ctd\u003e≤ 188 HV\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRoHS Compliant\u003c\/td\u003e\n\u003ctd\u003eYes (trivalent chromium passivation — Cr⁶⁺-free)\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 electroplated zinc finish is applied after threading and provides cathodic protection to the steel substrate. Trivalent chromium (Cr³⁺) passivation is applied over the zinc layer for enhanced corrosion resistance and RoHS compliance — no hexavalent chromium (Cr⁶⁺) is used.\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\u003eMaterial:\u003c\/strong\u003e Q195 low carbon structural steel (GB\/T 700); approx. equivalent to S185 (EN 10025), A36 (ASTM)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSurface:\u003c\/strong\u003e Electroplated zinc + trivalent chromium passivation (Cr³⁺); RoHS compliant; no Cr⁶⁺\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating thickness:\u003c\/strong\u003e 5–12 μm per ISO 4042; thread tolerance maintained at 6H after plating\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\u003eTypical applications:\u003c\/strong\u003e Threaded rod extension, stud-to-stud connection, anchor bolt adjustment, height adjustment assemblies, general construction, HVAC, furniture hardware, sheltered outdoor structures\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSurface Treatment Comparison — DIN 6334 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\u003eSurface\u003c\/th\u003e\n      \u003cth\u003eMaterial\u003c\/th\u003e\n      \u003cth\u003eCorrosion Resistance\u003c\/th\u003e\n      \u003cth\u003eAppearance\u003c\/th\u003e\n      \u003cth\u003eTypical Environment\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr style=\"background-color:#fff8e1;\"\u003e\n\u003ctd\u003e\u003cstrong\u003eZinc Plated ✓\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eQ195 steel\u003c\/td\u003e\n\u003ctd\u003eGood (≥72h salt spray)\u003c\/td\u003e\n\u003ctd\u003eBright silver\u003c\/td\u003e\n\u003ctd\u003eIndoor, sheltered outdoor, general industrial\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBare (uncoated)\u003c\/td\u003e\n\u003ctd\u003eQ195 steel\u003c\/td\u003e\n\u003ctd\u003eLow\u003c\/td\u003e\n\u003ctd\u003eMill finish\u003c\/td\u003e\n\u003ctd\u003ePre-coat assemblies; post-weld painting\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePassivated\u003c\/td\u003e\n\u003ctd\u003eA2 (SUS304)\u003c\/td\u003e\n\u003ctd\u003eVery Good\u003c\/td\u003e\n\u003ctd\u003eBright stainless\u003c\/td\u003e\n\u003ctd\u003eGeneral industrial, outdoor, light corrosion\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePassivated\u003c\/td\u003e\n\u003ctd\u003eA4 (SUS316)\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003ctd\u003eBright stainless\u003c\/td\u003e\n\u003ctd\u003eMarine, chemical, food-grade, offshore\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 Hex Coupling Nuts — Q195 Low Carbon Steel, Zinc Plated 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 — Q195 Low Carbon Structural Steel (GB\/T 700)\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\u003eMn (%)\u003c\/th\u003e\n\u003cth\u003eP (%)\u003c\/th\u003e\n\u003cth\u003eS (%)\u003c\/th\u003e\n\u003cth\u003eSi (%)\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eQ195\u003c\/td\u003e\n      \u003ctd\u003e≤ 0.12\u003c\/td\u003e\n      \u003ctd\u003e≤ 0.50\u003c\/td\u003e\n      \u003ctd\u003e≤ 0.035\u003c\/td\u003e\n      \u003ctd\u003e≤ 0.040\u003c\/td\u003e\n      \u003ctd\u003e≤ 0.30\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* Q195 ultra-low carbon content (≤ 0.12%) ensures excellent weldability and ductility. Approximate international equivalents: S185 (EN 10025-2), A36 (ASTM A36), SS330 (JIS G3101). Hardness ≤ 188 HV eliminates hydrogen embrittlement risk during zinc electroplating acid pickling process.\u003c\/p\u003e\n\n\u003ch2\u003eMechanical Properties — ISO Class 4 (ISO 898-2)\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 max)\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\u003eClass 4\u003c\/td\u003e\n\u003ctd\u003e≥ 510\u003c\/td\u003e\n\u003ctd\u003e≥ 400\u003c\/td\u003e\n\u003ctd\u003e≤ 188\u003c\/td\u003e\n\u003ctd\u003e≥ 22%\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* Hardness ≤ 188 HV (Class 4) is below the hydrogen embrittlement risk threshold, making Q195 the safest material choice for electroplated zinc fasteners. No baking \/ de-embrittlement treatment required.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Choose FULLERKREG DIN 6334 Zinc Plated Coupling Nuts?\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e🏭 \u003cstrong\u003eFactory Direct\u003c\/strong\u003e — Manufactured and plated in-house with full process control from raw material to finished part\u003c\/li\u003e\n  \u003cli\u003e💰 \u003cstrong\u003eMost Cost-Effective Option\u003c\/strong\u003e — Q195 steel + zinc plating delivers the best price-to-performance ratio in the DIN 6334 coupling nut range\u003c\/li\u003e\n  \u003cli\u003e🛡️ \u003cstrong\u003eReliable Corrosion Protection\u003c\/strong\u003e — Electroplated zinc provides ≥72h salt spray resistance (ISO 9227) for indoor and sheltered outdoor applications\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eRoHS Compliant\u003c\/strong\u003e — Trivalent chromium (Cr³⁺) passivation only; zero hexavalent chromium (Cr⁶⁺); fully RoHS and REACH compliant\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\u003c\/li\u003e\n  \u003cli\u003e📐 \u003cstrong\u003eStrict DIN 6334 Compliance\u003c\/strong\u003e — Length precisely 3×d; thread tolerance 6H maintained after plating; every dimension verified\u003c\/li\u003e\n  \u003cli\u003e🔬 \u003cstrong\u003eMaterial Certified\u003c\/strong\u003e — Mill test certificates (MTC) available; Q195 composition verified per GB\/T 700\u003c\/li\u003e\n  \u003cli\u003e📏 \u003cstrong\u003eWide Size Range\u003c\/strong\u003e — M3 through M56; covers light precision assemblies to heavy structural 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":"din6334-4-m5","title":"M5-0.8*15(s=8) DIN 6334, METRIC, HEX COUPLING NUTS, STEEL, ZINC PLATED-3500 Pcs per Carton","description":"\u003cp\u003e22\u003c\/p\u003e","brand":"Fullerkreg Fasteners","offers":[{"title":"Default Title","offer_id":44522672717935,"sku":"DIN6334-4-M5","price":87.5,"currency_code":"USD","in_stock":true}]},{"product_id":"din6334-4-m6","title":"M6-1.0*18(s=10) DIN 6334, METRIC, HEX COUPLING NUTS, STEEL, ZINC PLATED-2000 Pcs per Carton","description":"\u003cp\u003e23\u003c\/p\u003e","brand":"Fullerkreg Fasteners","offers":[{"title":"Default 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