{"title":"DIN 128B Lock Washer Spring – 70# Steel Zinc","description":"\u003ch1\u003eDIN 128B Wavy Spring Lock Washer — 70# Spring Steel, Zinc Plated\u003c\/h1\u003e\n\n\u003cp\u003eFULLERKREG DIN 128B wavy spring lock washers are manufactured to DIN 128 Type B standard in 70# high-carbon spring steel (Grade 70, per GB\/T 699) with mechanical zinc plating. DIN 128 Type B features a wavy (corrugated) profile with multiple waves around the ring circumference, generating distributed axial spring force with multi-point contact. The 70# spring steel achieves 40–50 HRC hardness after quench and temper, delivering superior spring force and fatigue resistance. Mechanical zinc plating provides enhanced corrosion protection without hydrogen embrittlement risk — the correct zinc process for high-hardness spring steel.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eNote on zinc treatment:\u003c\/strong\u003e At 40–50 HRC, conventional electroplating introduces hydrogen embrittlement risk. FULLERKREG applies \u003cstrong\u003emechanical zinc plating\u003c\/strong\u003e (per GB\/T 17460) — cold mechanical impact with no acid pickling, no electrical current, no hydrogen introduction.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eProduct Highlights\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandard:\u003c\/strong\u003e DIN 128 Type B (Wavy Spring Lock Washer)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 70# Spring Steel (Grade 70, GB\/T 699)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSurface Treatment:\u003c\/strong\u003e Mechanical Zinc Plating (GB\/T 17460) — no hydrogen embrittlement\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHardness:\u003c\/strong\u003e 40–50 HRC (392–513 HV) after quench \u0026amp; temper\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSize Range:\u003c\/strong\u003e M2 – M36\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProfile:\u003c\/strong\u003e Type B — Wavy \/ corrugated (multiple waves)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorrosion Resistance:\u003c\/strong\u003e Enhanced — suitable for light outdoor and humid environments\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eRoHS \u0026amp; REACH Compliant\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eDimensional Specifications — DIN 128 Type B (Wavy), 70# Steel Zinc\u003c\/h2\u003e\n\u003cp\u003eAll dimensions in millimeters (mm). Per DIN 128 Type B.\u003c\/p\u003e\n\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n\u003cth\u003eNominal Size\u003c\/th\u003e\n\u003cth\u003eFor Bolt\u003c\/th\u003e\n\u003cth\u003ed1 min\u003c\/th\u003e\n\u003cth\u003ed2 max\u003c\/th\u003e\n\u003cth\u003eh min\u003c\/th\u003e\n\u003cth\u003eh max\u003c\/th\u003e\n\u003cth\u003es (thickness)\u003c\/th\u003e\n\u003cth\u003eb (width)\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eM2\u003c\/td\u003e\n\u003ctd\u003e2.1\u003c\/td\u003e\n\u003ctd\u003e4.4\u003c\/td\u003e\n\u003ctd\u003e0.70\u003c\/td\u003e\n\u003ctd\u003e1.10\u003c\/td\u003e\n\u003ctd\u003e0.6\u003c\/td\u003e\n\u003ctd\u003e0.9\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e2.3\u003c\/td\u003e\n\u003ctd\u003eM2.3\u003c\/td\u003e\n\u003ctd\u003e2.4\u003c\/td\u003e\n\u003ctd\u003e4.9\u003c\/td\u003e\n\u003ctd\u003e0.90\u003c\/td\u003e\n\u003ctd\u003e1.10\u003c\/td\u003e\n\u003ctd\u003e0.6\u003c\/td\u003e\n\u003ctd\u003e0.9\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e2.5\u003c\/td\u003e\n\u003ctd\u003eM2.5\u003c\/td\u003e\n\u003ctd\u003e2.6\u003c\/td\u003e\n\u003ctd\u003e5.1\u003c\/td\u003e\n\u003ctd\u003e0.90\u003c\/td\u003e\n\u003ctd\u003e1.10\u003c\/td\u003e\n\u003ctd\u003e0.6\u003c\/td\u003e\n\u003ctd\u003e1.0\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e2.6\u003c\/td\u003e\n\u003ctd\u003eM2.6\u003c\/td\u003e\n\u003ctd\u003e2.7\u003c\/td\u003e\n\u003ctd\u003e5.2\u003c\/td\u003e\n\u003ctd\u003e0.90\u003c\/td\u003e\n\u003ctd\u003e1.10\u003c\/td\u003e\n\u003ctd\u003e0.6\u003c\/td\u003e\n\u003ctd\u003e1.0\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eM3\u003c\/td\u003e\n\u003ctd\u003e3.1\u003c\/td\u003e\n\u003ctd\u003e6.2\u003c\/td\u003e\n\u003ctd\u003e1.10\u003c\/td\u003e\n\u003ctd\u003e1.30\u003c\/td\u003e\n\u003ctd\u003e0.7\u003c\/td\u003e\n\u003ctd\u003e1.3\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e3.5\u003c\/td\u003e\n\u003ctd\u003eM3.5\u003c\/td\u003e\n\u003ctd\u003e3.6\u003c\/td\u003e\n\u003ctd\u003e6.7\u003c\/td\u003e\n\u003ctd\u003e1.20\u003c\/td\u003e\n\u003ctd\u003e1.30\u003c\/td\u003e\n\u003ctd\u003e0.7\u003c\/td\u003e\n\u003ctd\u003e1.3\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eM4\u003c\/td\u003e\n\u003ctd\u003e4.1\u003c\/td\u003e\n\u003ctd\u003e7.6\u003c\/td\u003e\n\u003ctd\u003e1.20\u003c\/td\u003e\n\u003ctd\u003e1.40\u003c\/td\u003e\n\u003ctd\u003e0.8\u003c\/td\u003e\n\u003ctd\u003e1.5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003eM5\u003c\/td\u003e\n\u003ctd\u003e5.1\u003c\/td\u003e\n\u003ctd\u003e9.2\u003c\/td\u003e\n\u003ctd\u003e1.50\u003c\/td\u003e\n\u003ctd\u003e1.70\u003c\/td\u003e\n\u003ctd\u003e1.0\u003c\/td\u003e\n\u003ctd\u003e1.8\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003ctd\u003eM6\u003c\/td\u003e\n\u003ctd\u003e6.1\u003c\/td\u003e\n\u003ctd\u003e11.8\u003c\/td\u003e\n\u003ctd\u003e2.00\u003c\/td\u003e\n\u003ctd\u003e2.20\u003c\/td\u003e\n\u003ctd\u003e1.3\u003c\/td\u003e\n\u003ctd\u003e2.5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003ctd\u003eM8\u003c\/td\u003e\n\u003ctd\u003e8.1\u003c\/td\u003e\n\u003ctd\u003e14.8\u003c\/td\u003e\n\u003ctd\u003e2.45\u003c\/td\u003e\n\u003ctd\u003e2.75\u003c\/td\u003e\n\u003ctd\u003e1.6\u003c\/td\u003e\n\u003ctd\u003e3.0\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e10\u003c\/td\u003e\n\u003ctd\u003eM10\u003c\/td\u003e\n\u003ctd\u003e10.2\u003c\/td\u003e\n\u003ctd\u003e18.1\u003c\/td\u003e\n\u003ctd\u003e2.85\u003c\/td\u003e\n\u003ctd\u003e3.35\u003c\/td\u003e\n\u003ctd\u003e1.8\u003c\/td\u003e\n\u003ctd\u003e3.5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003ctd\u003eM12\u003c\/td\u003e\n\u003ctd\u003e12.2\u003c\/td\u003e\n\u003ctd\u003e21.1\u003c\/td\u003e\n\u003ctd\u003e3.35\u003c\/td\u003e\n\u003ctd\u003e3.65\u003c\/td\u003e\n\u003ctd\u003e2.1\u003c\/td\u003e\n\u003ctd\u003e4.0\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e14\u003c\/td\u003e\n\u003ctd\u003eM14\u003c\/td\u003e\n\u003ctd\u003e14.2\u003c\/td\u003e\n\u003ctd\u003e24.1\u003c\/td\u003e\n\u003ctd\u003e3.90\u003c\/td\u003e\n\u003ctd\u003e4.30\u003c\/td\u003e\n\u003ctd\u003e2.4\u003c\/td\u003e\n\u003ctd\u003e4.5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e16\u003c\/td\u003e\n\u003ctd\u003eM16\u003c\/td\u003e\n\u003ctd\u003e16.2\u003c\/td\u003e\n\u003ctd\u003e27.4\u003c\/td\u003e\n\u003ctd\u003e4.50\u003c\/td\u003e\n\u003ctd\u003e5.10\u003c\/td\u003e\n\u003ctd\u003e2.8\u003c\/td\u003e\n\u003ctd\u003e5.0\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e18\u003c\/td\u003e\n\u003ctd\u003eM18\u003c\/td\u003e\n\u003ctd\u003e18.2\u003c\/td\u003e\n\u003ctd\u003e26.4\u003c\/td\u003e\n\u003ctd\u003e4.50\u003c\/td\u003e\n\u003ctd\u003e5.10\u003c\/td\u003e\n\u003ctd\u003e2.8\u003c\/td\u003e\n\u003ctd\u003e5.0\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003ctd\u003eM20\u003c\/td\u003e\n\u003ctd\u003e20.2\u003c\/td\u003e\n\u003ctd\u003e33.6\u003c\/td\u003e\n\u003ctd\u003e5.10\u003c\/td\u003e\n\u003ctd\u003e5.90\u003c\/td\u003e\n\u003ctd\u003e3.2\u003c\/td\u003e\n\u003ctd\u003e6.0\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e22\u003c\/td\u003e\n\u003ctd\u003eM22\u003c\/td\u003e\n\u003ctd\u003e22.5\u003c\/td\u003e\n\u003ctd\u003e35.9\u003c\/td\u003e\n\u003ctd\u003e5.10\u003c\/td\u003e\n\u003ctd\u003e5.90\u003c\/td\u003e\n\u003ctd\u003e3.2\u003c\/td\u003e\n\u003ctd\u003e6.0\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e24\u003c\/td\u003e\n\u003ctd\u003eM24\u003c\/td\u003e\n\u003ctd\u003e24.5\u003c\/td\u003e\n\u003ctd\u003e40.0\u003c\/td\u003e\n\u003ctd\u003e6.50\u003c\/td\u003e\n\u003ctd\u003e7.50\u003c\/td\u003e\n\u003ctd\u003e4.0\u003c\/td\u003e\n\u003ctd\u003e7.0\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e27\u003c\/td\u003e\n\u003ctd\u003eM27\u003c\/td\u003e\n\u003ctd\u003e27.5\u003c\/td\u003e\n\u003ctd\u003e43.0\u003c\/td\u003e\n\u003ctd\u003e6.50\u003c\/td\u003e\n\u003ctd\u003e7.50\u003c\/td\u003e\n\u003ctd\u003e4.0\u003c\/td\u003e\n\u003ctd\u003e7.0\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003ctd\u003eM30\u003c\/td\u003e\n\u003ctd\u003e30.5\u003c\/td\u003e\n\u003ctd\u003e48.2\u003c\/td\u003e\n\u003ctd\u003e9.50\u003c\/td\u003e\n\u003ctd\u003e10.50\u003c\/td\u003e\n\u003ctd\u003e5.0\u003c\/td\u003e\n\u003ctd\u003e8.0\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e36\u003c\/td\u003e\n\u003ctd\u003eM36\u003c\/td\u003e\n\u003ctd\u003e36.5\u003c\/td\u003e\n\u003ctd\u003e58.2\u003c\/td\u003e\n\u003ctd\u003e10.30\u003c\/td\u003e\n\u003ctd\u003e11.30\u003c\/td\u003e\n\u003ctd\u003e6.0\u003c\/td\u003e\n\u003ctd\u003e10.0\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eAll dimensions in mm per DIN 128 Type B. s = material thickness; b = ring width; h = free height (wavy profile height).\u003c\/em\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eMaterial Properties — 70# Spring Steel (GB\/T 699)\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eProperty\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMaterial Grade\u003c\/td\u003e\n\u003ctd\u003e70# Spring Steel (Grade 70)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eGB Standard\u003c\/td\u003e\n\u003ctd\u003eGB\/T 699, GB\/T 4354\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eC Content\u003c\/td\u003e\n\u003ctd\u003e0.67 – 0.75%\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMn Content\u003c\/td\u003e\n\u003ctd\u003e0.50 – 0.80%\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHeat Treatment\u003c\/td\u003e\n\u003ctd\u003eQuench \u0026amp; Temper\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHardness\u003c\/td\u003e\n\u003ctd\u003e40 – 50 HRC (392 – 513 HV)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTensile Strength\u003c\/td\u003e\n\u003ctd\u003e1275 MPa min.\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSurface Treatment\u003c\/td\u003e\n\u003ctd\u003eMechanical Zinc Plating (GB\/T 17460)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCoating Thickness\u003c\/td\u003e\n\u003ctd\u003e8 – 25 um\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-40°C to +120°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRoHS \/ REACH\u003c\/td\u003e\n\u003ctd\u003eCompliant\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eChemical Composition — 70# Spring Steel (GB\/T 699)\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eElement\u003c\/th\u003e\n\u003cth\u003eC\u003c\/th\u003e\n\u003cth\u003eMn\u003c\/th\u003e\n\u003cth\u003eSi\u003c\/th\u003e\n\u003cth\u003eP max\u003c\/th\u003e\n\u003cth\u003eS max\u003c\/th\u003e\n\u003cth\u003eCr max\u003c\/th\u003e\n\u003cth\u003eNi max\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eContent %\u003c\/td\u003e\n\u003ctd\u003e0.67–0.75\u003c\/td\u003e\n\u003ctd\u003e0.50–0.80\u003c\/td\u003e\n\u003ctd\u003e0.17–0.37\u003c\/td\u003e\n\u003ctd\u003e0.035\u003c\/td\u003e\n\u003ctd\u003e0.035\u003c\/td\u003e\n\u003ctd\u003e0.25\u003c\/td\u003e\n\u003ctd\u003e0.25\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eNote: 70# steel (GB\/T 699) is distinct from 65Mn spring steel (GB\/T 1222). 70# has higher carbon (0.67–0.75%) and lower manganese (0.50–0.80%).\u003c\/em\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eDIN 128B vs. DIN 128A — Key Differences\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eDIN 128 Type B (Wavy)\u003c\/th\u003e\n\u003cth\u003eDIN 128 Type A (Curved)\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eProfile\u003c\/td\u003e\n\u003ctd\u003eWavy \/ corrugated (multiple waves)\u003c\/td\u003e\n\u003ctd\u003eSingle curved arc\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eContact points\u003c\/td\u003e\n\u003ctd\u003eMulti-point contact\u003c\/td\u003e\n\u003ctd\u003eContinuous curved contact\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSpring action\u003c\/td\u003e\n\u003ctd\u003eDistributed multi-wave spring force\u003c\/td\u003e\n\u003ctd\u003eAxial spring via single curve\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTypical use\u003c\/td\u003e\n\u003ctd\u003eGeneral assemblies, light to medium loads\u003c\/td\u003e\n\u003ctd\u003eCheese head \u0026amp; pan head screws\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eApplication Scenarios\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeavy machinery \u0026amp; industrial equipment\u003c\/strong\u003e — high spring force with outdoor corrosion protection\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAutomotive manufacturing\u003c\/strong\u003e — chassis, underbody, and engine assemblies exposed to moisture\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConstruction \u0026amp; steel structures\u003c\/strong\u003e — sheltered outdoor environments\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAgricultural \u0026amp; mining equipment\u003c\/strong\u003e — high-vibration, humid conditions\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRailway \u0026amp; transportation equipment\u003c\/strong\u003e — vibration resistance with corrosion protection\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHVAC \u0026amp; mechanical systems\u003c\/strong\u003e — semi-outdoor or humid installations\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSoft material assemblies\u003c\/strong\u003e — wavy profile distributes load without sharp edge marking\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eProduct Photo Gallery\u003c\/h2\u003e\n\u003cp\u003eFULLERKREG DIN 128B Wavy Spring Lock Washer, 70# Spring Steel, Zinc Plated:\u003c\/p\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"width:25%;text-align:center;padding:12px\"\u003e[ Photo 1 ]\u003c\/td\u003e\n      \u003ctd style=\"width:25%;text-align:center;padding:12px\"\u003e[ Photo 2 ]\u003c\/td\u003e\n      \u003ctd style=\"width:25%;text-align:center;padding:12px\"\u003e[ Photo 3 ]\u003c\/td\u003e\n      \u003ctd style=\"width:25%;text-align:center;padding:12px\"\u003e[ Photo 4 ]\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eWhy Choose FULLERKREG?\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e🏭 \u003cstrong\u003eDirect manufacturer\u003c\/strong\u003e — factory in China, no middlemen\u003c\/li\u003e\n  \u003cli\u003e📐 \u003cstrong\u003eStrict DIN dimensional control\u003c\/strong\u003e — 100% inspection on critical dimensions and hardness\u003c\/li\u003e\n  \u003cli\u003e🌍 \u003cstrong\u003eGlobal export experience\u003c\/strong\u003e — serving distributors in Europe, North America, Southeast Asia\u003c\/li\u003e\n  \u003cli\u003e📦 \u003cstrong\u003eFlexible MOQ\u003c\/strong\u003e — small trial orders and large bulk shipments both welcome\u003c\/li\u003e\n  \u003cli\u003e📋 \u003cstrong\u003eFull documentation\u003c\/strong\u003e — material certs, hardness reports, RoHS declarations available\u003c\/li\u003e\n  \u003cli\u003e⚡ \u003cstrong\u003eFast lead times\u003c\/strong\u003e — standard sizes in stock, ready to ship\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 is DIN 128 Type B?\u003c\/strong\u003e\u003cbr\u003e\nA: DIN 128 Type B is a wavy (corrugated) spring lock washer with multiple waves around the ring circumference. It generates distributed axial spring force with multi-point contact, providing anti-loosening performance without sharp edges or surface marking.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Why mechanical zinc plating for 70# spring steel?\u003c\/strong\u003e\u003cbr\u003e\nA: At 40–50 HRC, conventional electroplating introduces hydrogen embrittlement risk during acid pickling. Mechanical zinc plating uses cold mechanical impact with no acid pickling or electrical current, eliminating this risk while providing 8–25 um zinc coating for enhanced corrosion protection.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What is 70# spring steel?\u003c\/strong\u003e\u003cbr\u003e\nA: Grade 70 per GB\/T 699, C 0.67–0.75%, achieving 40–50 HRC after quench and temper. Superior spring force, elastic recovery, and fatigue resistance vs. standard carbon steel. Distinct from 65Mn spring steel.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: DIN 128B vs. DIN 127B — which to choose?\u003c\/strong\u003e\u003cbr\u003e\nA: DIN 128B (wavy) has no sharp edges and does not mark bearing surfaces — ideal for soft materials and coated surfaces. DIN 127B (helical split) provides stronger anti-loosening via bite-in effect — better for heavy-duty assemblies where surface marking is acceptable.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Do you provide material test certificates?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes. Mill certificates, hardness reports, chemical composition reports, and RoHS declarations available upon request.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003cp\u003e\u003cstrong\u003eFULLERKREG Fasteners\u003c\/strong\u003e — Precision DIN Standard Fasteners, Direct from Manufacturer.\u003cbr\u003e\nFor wholesale inquiries, technical questions, or custom orders, please contact our sales team.\u003c\/p\u003e","products":[],"url":"https:\/\/www.fullerkr.com\/collections\/din-128b-lock-washer-spring-70-steel-zinc.oembed","provider":"Fullerkreg Fasteners","version":"1.0","type":"link"}