{"title":"DIN 985 Class 8 Zinc Finish Steel Nylon Insert Lock Nut","description":"\u003ch1\u003eDIN 985 Hexagon Nylon Insert Lock Nuts – Class 8 Zinc Finish Alloy Steel (10B21)\u003c\/h1\u003e\n\n\u003cp\u003eFULLERKREG DIN 985 Class 8 nylon insert lock nuts are cold-forged from 10B21 boron alloy steel and finished with Zinc Cr3 (trivalent chromium) electroplating, delivering high-strength prevailing torque performance with reliable corrosion protection. The integrated nylon collar locks against vibration and dynamic loads without damaging the mating thread. Designed for demanding mechanical assemblies where Class 4 carbon steel is insufficient — including automotive powertrains, heavy machinery, structural steel, and high-load industrial equipment.\u003c\/p\u003e\n\n\u003ch2\u003eProduct Specifications\u003c\/h2\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:14px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003cth style=\"border:1px solid #ddd;padding:8px;text-align:left;\"\u003eAttribute\u003c\/th\u003e\n\u003cth style=\"border:1px solid #ddd;padding:8px;text-align:left;\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eDIN 985 \/ ISO 7042\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eType\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eHexagon Nylon Insert Lock Nut (Prevailing Torque)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eMaterial\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003e10B21 Boron Alloy Steel (quenched \u0026amp; tempered)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eStrength Class\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eClass 8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eSurface Finish\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eZinc Cr3 (Trivalent Chromium Electroplating)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eZinc Layer Thickness\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003e≥ 5 μm (standard); ≥ 8 μm available on request\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eThread\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eMetric Coarse Thread (ISO 68-1)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eSize Range\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eM3 – M20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eInsert Material\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eNylon (Polyamide PA66)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eTemperature Range\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003e-40°C to +120°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eHeat Treatment\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eQuenched \u0026amp; Tempered (Q\u0026amp;T)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eRoHS Compliant\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eYes (Cr3 \/ Trivalent — no hexavalent chromium)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eFULLERKREG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eDimensional Data (DIN 985 – Class 8, Metric)\u003c\/h2\u003e\n\u003cp\u003eAll dimensions in millimeters (mm). Unit weight (单重) is approximate reference value.\u003c\/p\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:13px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background:#f0f0f0;\"\u003e\n\u003cth style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003eNominal Size\u003c\/th\u003e\n\u003cth style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003ePitch (mm)\u003c\/th\u003e\n\u003cth style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003eF – Width Across Flats Max (mm)\u003c\/th\u003e\n\u003cth style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003eF – Width Across Flats Min (mm)\u003c\/th\u003e\n\u003cth style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003eG – Width Across Corners Min (mm)\u003c\/th\u003e\n\u003cth style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003eH – Thickness Max (mm)\u003c\/th\u003e\n\u003cth style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003eH – Thickness Min (mm)\u003c\/th\u003e\n\u003cth style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003eI – Wrenching Height Min (mm)\u003c\/th\u003e\n\u003cth style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e单重 (g\/pc)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003eM3\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e0.5\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e5.50\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e5.32\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e6.01\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e4.0\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e3.7\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e2.4\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e~0.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#fafafa;\"\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003eM4\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e0.7\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e7.00\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e6.78\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e7.66\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e5.0\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e4.7\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e2.9\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e~1.2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003eM5\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e0.8\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e8.00\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e7.78\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e8.79\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e5.0\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e4.7\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e3.2\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e~2.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#fafafa;\"\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003eM6\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e1.0\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e10.00\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e9.78\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e11.05\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e6.0\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e5.7\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e4.0\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e~3.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003eM7\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e1.0\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e11.00\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e10.73\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e12.12\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e7.5\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e7.14\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e4.7\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e~5.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#fafafa;\"\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003eM8\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e1.25\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e13.00\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e12.73\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e14.38\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e8.0\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e7.64\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e5.6\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e~7.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003eM10\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e1.5\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e17.00\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e16.73\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e18.90\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e10.0\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e9.64\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e6.5\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e~14\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#fafafa;\"\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003eM12\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e1.75\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e19.00\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e18.67\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e21.10\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e12.0\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e11.57\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e8.0\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e~23\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003eM14\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e2.0\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e22.00\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e21.67\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e24.49\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e14.0\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e13.3\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e9.5\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e~37\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#fafafa;\"\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003eM16\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e2.0\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e24.00\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e23.67\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e26.75\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e16.0\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e15.3\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e10.5\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e~55\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003eM18\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e2.5\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e27.00\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e26.16\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e29.56\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e18.0\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e17.66\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e13.0\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e~78\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#fafafa;\"\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003eM20\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e2.5\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e30.00\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e29.16\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e32.95\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e20.0\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e19.7\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e14.0\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:7px;text-align:center;\"\u003e~110\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"font-size:12px;color:#888;\"\u003e* Dimensions per DIN 985 \/ ISO 7042. Unit weight values are approximate and for reference only. Alloy steel density ≈ 7.85 g\/cm³. Actual weight may vary slightly by batch.\u003c\/p\u003e\n\n\u003ch2\u003eClass 8 vs Class 4 – Strength Comparison\u003c\/h2\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:13px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background:#f0f0f0;\"\u003e\n\u003cth style=\"border:1px solid #ccc;padding:8px;\"\u003eProperty\u003c\/th\u003e\n\u003cth style=\"border:1px solid #ccc;padding:8px;\"\u003eClass 4 (Low Carbon Steel)\u003c\/th\u003e\n\u003cth style=\"border:1px solid #ccc;padding:8px;\"\u003eClass 8 (10B21 Alloy Steel) ✓ This Product\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:8px;\"\u003eMaterial\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:8px;\"\u003eML08AL Low Carbon Steel\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:8px;\"\u003e10B21 Boron Alloy Steel (Q\u0026amp;T)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#fafafa;\"\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:8px;\"\u003eProof Load (N\/mm²)\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:8px;\"\u003e510\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:8px;\"\u003e800\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:8px;\"\u003eHardness\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:8px;\"\u003e188 HV max\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:8px;\"\u003e302 HV max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#fafafa;\"\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:8px;\"\u003eApplicable Bolt Class\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:8px;\"\u003e4.8 or lower\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:8px;\"\u003e8.8 or lower\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:8px;\"\u003eHeat Treatment\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:8px;\"\u003eNone\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:8px;\"\u003eQuenched \u0026amp; Tempered\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#fafafa;\"\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:8px;\"\u003eTypical Application\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:8px;\"\u003eGeneral \/ light-duty assemblies\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:8px;\"\u003eAutomotive, heavy machinery, structural\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eSelection Guide\u003c\/h2\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:13px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background:#f0f0f0;\"\u003e\n\u003cth style=\"border:1px solid #ccc;padding:8px;\"\u003eApplication Scenario\u003c\/th\u003e\n\u003cth style=\"border:1px solid #ccc;padding:8px;\"\u003eRecommended Size\u003c\/th\u003e\n\u003cth style=\"border:1px solid #ccc;padding:8px;\"\u003eKey Consideration\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:8px;\"\u003eAutomotive powertrain \u0026amp; suspension\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:8px;\"\u003eM8 – M16\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:8px;\"\u003eHigh-strength, vibration-resistant locking\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#fafafa;\"\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:8px;\"\u003eHeavy machinery \u0026amp; construction equipment\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:8px;\"\u003eM10 – M20\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:8px;\"\u003eClass 8 handles high dynamic loads\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:8px;\"\u003eSteel structures \u0026amp; bridges\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:8px;\"\u003eM12 – M20\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:8px;\"\u003eMatches 8.8 bolt assemblies\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#fafafa;\"\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:8px;\"\u003eAgricultural \u0026amp; off-road equipment\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:8px;\"\u003eM8 – M20\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:8px;\"\u003eWithstands shock \u0026amp; vibration in field use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:8px;\"\u003eIndustrial pumps \u0026amp; compressors\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:8px;\"\u003eM6 – M16\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:8px;\"\u003eNylon insert prevents loosening under cyclic load\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#fafafa;\"\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:8px;\"\u003eWind turbine \u0026amp; energy equipment\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:8px;\"\u003eM12 – M20\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ccc;padding:8px;\"\u003eHigh proof load for critical structural joints\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eStandard \u0026amp; Compliance\u003c\/h2\u003e\n\u003cp\u003eThese nylon insert lock nuts are manufactured in full compliance with \u003cstrong\u003eDIN 985\u003c\/strong\u003e and the equivalent international standard \u003cstrong\u003eISO 7042\u003c\/strong\u003e. Mechanical properties conform to \u003cstrong\u003eISO 898-2 Class 8\u003c\/strong\u003e. Surface treatment meets \u003cstrong\u003eISO 4042\u003c\/strong\u003e (electroplated zinc coatings) with trivalent chromate passivation (Cr3), fully compliant with \u003cstrong\u003eRoHS 2011\/65\/EU\u003c\/strong\u003e and \u003cstrong\u003eELV 2000\/53\/EC\u003c\/strong\u003e — no hexavalent chromium (Cr6). Heat treatment (quench \u0026amp; temper) is applied to achieve Class 8 mechanical properties.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eProof Load (N\/mm²): 800 (Class 8)\u003c\/li\u003e\n\u003cli\u003eHardness: Vickers HV 5: 302 max \/ Rockwell C: 30 max\u003c\/li\u003e\n\u003cli\u003eApplicable bolt class: Class 8.8 or less\u003c\/li\u003e\n\u003cli\u003eSalt spray test: ≥ 72 hrs white rust \/ ≥ 120 hrs red rust (per ISO 9227)\u003c\/li\u003e\n\u003cli\u003eHydrogen embrittlement relief: baking process applied post-plating where required\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eProduct Gallery\u003c\/h2\u003e\n\u003cp\u003eDIN 985 Class 8 Zinc Finish Alloy Steel Nylon Insert Lock Nuts – actual product photos:\u003c\/p\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:25%;padding:8px;text-align:center;border:1px solid #eee;\"\u003e \u003c\/td\u003e\n\u003ctd style=\"width:25%;padding:8px;text-align:center;border:1px solid #eee;\"\u003e \u003c\/td\u003e\n\u003ctd style=\"width:25%;padding:8px;text-align:center;border:1px solid #eee;\"\u003e \u003c\/td\u003e\n\u003ctd style=\"width:25%;padding:8px;text-align:center;border:1px solid #eee;\"\u003e \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Choose FULLERKREG?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e🏭 \u003cstrong\u003eDirect Manufacturer\u003c\/strong\u003e – Factory-direct pricing with no middlemen, ensuring competitive wholesale rates\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eStrict Quality Control\u003c\/strong\u003e – 100% dimensional inspection; hardness test reports, salt spray certificates, and MTC available on request\u003c\/li\u003e\n\u003cli\u003e📦 \u003cstrong\u003eFlexible MOQ \u0026amp; Packaging\u003c\/strong\u003e – Custom packaging quantities, OEM labeling, bulk bag or box options\u003c\/li\u003e\n\u003cli\u003e🚢 \u003cstrong\u003eGlobal Shipping\u003c\/strong\u003e – FBA-ready shipments to Amazon warehouses; direct export to 50+ countries\u003c\/li\u003e\n\u003cli\u003e🔬 \u003cstrong\u003eEngineering Support\u003c\/strong\u003e – Technical datasheets, CAD drawings, and application guidance available\u003c\/li\u003e\n\u003cli\u003e⚡ \u003cstrong\u003eFast Lead Times\u003c\/strong\u003e – In-stock items ship within 3–5 business days; custom orders within 15–25 days\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why use 10B21 boron alloy steel for Class 8 nuts?\u003c\/strong\u003e\u003cbr\u003eA: 10B21 contains boron (B) which significantly improves hardenability during quench \u0026amp; temper heat treatment, allowing the nut to achieve Class 8 mechanical properties (800 N\/mm² proof load) with excellent toughness and consistent hardness throughout the cross-section — at lower cost than traditional alloy steels.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can Class 8 DIN 985 nylon lock nuts be used with 10.9 bolts?\u003c\/strong\u003e\u003cbr\u003eA: No. Class 8 nuts are rated for use with Class 8.8 bolts or lower. For 10.9 bolt assemblies, a higher-grade nut is required. Using an under-rated nut risks thread stripping under proof load.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the risk of hydrogen embrittlement with zinc-plated high-strength nuts?\u003c\/strong\u003e\u003cbr\u003eA: Electroplating can introduce hydrogen into the steel, causing embrittlement in high-strength fasteners. FULLERKREG applies a post-plating baking (de-embrittlement) process where required to eliminate this risk, per ISO 4042 and ASTM F1941 guidelines.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can DIN 985 Class 8 nylon lock nuts be reused?\u003c\/strong\u003e\u003cbr\u003eA: Limited reuse is possible, but for critical or safety-relevant joints, single-use is strongly recommended. The nylon insert loses prevailing torque effectiveness after repeated cycling, and Class 8 joints are typically in high-load applications where reliability is paramount.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Do you provide material test certificates and mechanical test reports?\u003c\/strong\u003e\u003cbr\u003eA: Yes. Mill test certificates (MTC), hardness test reports, salt spray test reports (ISO 9227), and RoHS declarations are available upon request for all orders.\u003c\/p\u003e","products":[{"product_id":"din-985-8-m3","title":"M3-0.5 DIN 985 Class 8 Zinc Finish Steel Nylon Insert Lock Nut-54000 Pcs per Carton","description":"\u003cp\u003e35\u003c\/p\u003e","brand":"Fullerkreg Fasteners","offers":[{"title":"Default Title","offer_id":44506627735663,"sku":"DIN 985-8-M3","price":270.0,"currency_code":"USD","in_stock":true}]},{"product_id":"din-985-8-m4","title":"M4-0.7 DIN 985 Class 8 Zinc Finish Steel Nylon Insert Lock Nut-24000 Pcs per Carton","description":"\u003cp\u003e36\u003c\/p\u003e","brand":"Fullerkreg Fasteners","offers":[{"title":"Default Title","offer_id":44506627768431,"sku":"DIN 985-8-M4","price":120.0,"currency_code":"USD","in_stock":true}]},{"product_id":"din-985-8-m5","title":"M5-0.8 DIN 985 Class 8 Zinc Finish Steel Nylon Insert Lock Nut-15000 Pcs per 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