{"title":"ISO 7380 Button Head Socket Cap Screw Grade 10.9 Zinc CR3","description":"\u003ch2\u003eFULLERKREG ISO 7380-1 \/ GB70.2 Grade 10.9 Zinc CR3 Button Head Socket Cap Screws\u003c\/h2\u003e\n\u003cp\u003eFULLERKREG ISO 7380-1 \/ GB70.2 Grade 10.9 Zinc CR3 Button Head Socket Cap Screws are high-strength fasteners featuring a low-profile dome-shaped button head with a hexagon socket drive. Manufactured from 10B21 boron-alloyed steel with an electroplated zinc coating using CR3 trivalent chromate passivation, these screws combine Grade 10.9 tensile strength (min. 1,040 MPa) with superior corrosion resistance and full RoHS environmental compliance. The bright silver zinc finish provides a professional appearance while protecting against corrosion in demanding environments.\u003c\/p\u003e\n\n\u003ch2\u003eProduct Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards:\u003c\/strong\u003e ISO 7380-1 \/ GB 70.2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStrength Grade:\u003c\/strong\u003e 10.9 (heat treated)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 10B21 boron-alloyed steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTensile Strength:\u003c\/strong\u003e Min. 1,040 MPa\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eYield Strength:\u003c\/strong\u003e Min. 940 MPa\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardness:\u003c\/strong\u003e HRC 32–39\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Type:\u003c\/strong\u003e Button head (low-profile dome)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurface Treatment:\u003c\/strong\u003e Zinc electroplating with CR3 trivalent chromate passivation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlating Thickness:\u003c\/strong\u003e Typically 5–12 μm zinc\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoHS Compliance:\u003c\/strong\u003e ✅ Fully compliant — CR3 trivalent chromate contains no hexavalent chromium (Cr6+)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Type:\u003c\/strong\u003e Metric coarse, full thread\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Tolerance:\u003c\/strong\u003e 6g\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrive Type:\u003c\/strong\u003e Hexagon socket (Allen key \/ hex key)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSizes Available:\u003c\/strong\u003e M3 – M16\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eRoHS Compliance — CR3 Trivalent Chromate Zinc Plating\u003c\/h2\u003e\n\u003cp\u003eThe zinc CR3 coating uses \u003cstrong\u003etrivalent chromium (Cr3+)\u003c\/strong\u003e passivation, replacing the traditional hexavalent chromium (Cr6+) process. This is essential for compliance with international environmental regulations:\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eRegulation\u003c\/th\u003e\n\u003cth\u003eRequirement\u003c\/th\u003e\n\u003cth\u003eCR3 Zinc Compliance\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eEU RoHS Directive (2011\/65\/EU)\u003c\/td\u003e\n\u003ctd\u003eNo hexavalent chromium (Cr6+)\u003c\/td\u003e\n\u003ctd\u003e✅ Compliant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEU REACH Regulation\u003c\/td\u003e\n\u003ctd\u003eNo SVHC restricted substances\u003c\/td\u003e\n\u003ctd\u003e✅ Compliant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eELV Directive (2000\/53\/EC)\u003c\/td\u003e\n\u003ctd\u003eNo Cr6+ in vehicle components\u003c\/td\u003e\n\u003ctd\u003e✅ Compliant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChina RoHS (GB\/T 26572)\u003c\/td\u003e\n\u003ctd\u003eNo restricted hazardous substances\u003c\/td\u003e\n\u003ctd\u003e✅ Compliant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eSurface Finish Comparison — Zinc CR3 vs Black Oxide\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eProperty\u003c\/th\u003e\n\u003cth\u003eZinc CR3 (This Page)\u003c\/th\u003e\n\u003cth\u003eBlack Oxide\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAppearance\u003c\/td\u003e\n\u003ctd\u003eBright silver\u003c\/td\u003e\n\u003ctd\u003eMatte black\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoating thickness\u003c\/td\u003e\n\u003ctd\u003e5–12 μm\u003c\/td\u003e\n\u003ctd\u003e1–2 μm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorrosion resistance\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eGood (72–120 hrs salt spray)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eModerate (with oil)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoHS compliance\u003c\/td\u003e\n\u003ctd\u003e✅ Compliant (CR3)\u003c\/td\u003e\n\u003ctd\u003e✅ Compliant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBest for\u003c\/td\u003e\n\u003ctd\u003eOutdoor, humid, RoHS-regulated applications\u003c\/td\u003e\n\u003ctd\u003eIndoor, precision, aesthetic applications\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrice\u003c\/td\u003e\n\u003ctd\u003e🔵 Slightly higher\u003c\/td\u003e\n\u003ctd\u003e🟢 Economy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eMaterial — 10B21 Boron Steel Chemical Composition (%)\u003c\/h2\u003e\n\u003cp\u003eFULLERKREG ISO 7380-1 Grade 10.9 Zinc CR3 button head screws are manufactured from 10B21 boron-alloyed steel. The addition of boron (B) significantly improves hardenability, enabling Grade 10.9 mechanical properties with a leaner alloy composition. All values are maximum unless a range is indicated.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eGrade\u003c\/th\u003e\n\u003cth\u003eC\u003c\/th\u003e\n\u003cth\u003eSi (max)\u003c\/th\u003e\n\u003cth\u003eMn\u003c\/th\u003e\n\u003cth\u003eP (max)\u003c\/th\u003e\n\u003cth\u003eS (max)\u003c\/th\u003e\n\u003cth\u003eB\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e10B21\u003c\/td\u003e\n\u003ctd\u003e0.18–0.23\u003c\/td\u003e\n\u003ctd\u003e≤0.30\u003c\/td\u003e\n\u003ctd\u003e0.80–1.10\u003c\/td\u003e\n\u003ctd\u003e≤0.030\u003c\/td\u003e\n\u003ctd\u003e≤0.030\u003c\/td\u003e\n\u003ctd\u003e0.0005–0.003\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eMechanical Properties — Grade 10.9 (ISO 898-1)\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eProperty\u003c\/th\u003e\n\u003cth\u003eRequirement\u003c\/th\u003e\n\u003cth\u003eUnit\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eTensile Strength (Rm)\u003c\/td\u003e\n\u003ctd\u003eMin. 1,040\u003c\/td\u003e\n\u003ctd\u003eMPa\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYield Strength \/ Proof Load Stress (Rp0.2)\u003c\/td\u003e\n\u003ctd\u003eMin. 940\u003c\/td\u003e\n\u003ctd\u003eMPa\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCore Hardness\u003c\/td\u003e\n\u003ctd\u003e32–39\u003c\/td\u003e\n\u003ctd\u003eHRC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSurface Hardness (max)\u003c\/td\u003e\n\u003ctd\u003e≤44\u003c\/td\u003e\n\u003ctd\u003eHRC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElongation after fracture (A)\u003c\/td\u003e\n\u003ctd\u003eMin. 9\u003c\/td\u003e\n\u003ctd\u003e%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReduction of area (Z)\u003c\/td\u003e\n\u003ctd\u003eMin. 48\u003c\/td\u003e\n\u003ctd\u003e%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImpact energy (KV) at room temp.\u003c\/td\u003e\n\u003ctd\u003eMin. 37\u003c\/td\u003e\n\u003ctd\u003eJ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThread Tolerance Class\u003c\/td\u003e\n\u003ctd\u003e6g\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSurface Treatment\u003c\/td\u003e\n\u003ctd\u003eZinc CR3 (trivalent chromate)\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e✅ RoHS \u0026amp; REACH Compliant\u003c\/strong\u003e — CR3 trivalent chromate zinc plating contains no hexavalent chromium (Cr6+), meeting EU RoHS, REACH, ELV, and China RoHS requirements\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade 10.9 high strength\u003c\/strong\u003e — 1,040 MPa tensile strength in a compact button head profile\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-profile button head\u003c\/strong\u003e — smooth dome design, approximately 50% lower than standard socket cap screws (DIN 912)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZinc CR3 coating\u003c\/strong\u003e — bright silver appearance with 72–120 hours salt spray resistance, superior to black oxide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide bearing surface\u003c\/strong\u003e — larger head diameter distributes clamping load over a greater area\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10B21 boron steel\u003c\/strong\u003e — excellent hardenability and consistent mechanical properties through heat treatment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO 7380-1 \/ GB 70.2 dual standard\u003c\/strong\u003e — suitable for both international and Chinese domestic supply chains\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO\/TS16949 quality management\u003c\/strong\u003e — hardness test, tensile test, salt spray test, and PPAP report available on request\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cp\u003eFULLERKREG ISO 7380-1 Grade 10.9 Zinc CR3 button head socket cap screws are widely used in high-strength, RoHS-regulated, and corrosion-exposed applications:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eElectronics and electrical equipment (EU RoHS regulated)\u003c\/li\u003e\n\u003cli\u003eAutomotive components and EV (electric vehicle) assemblies (ELV compliant)\u003c\/li\u003e\n\u003cli\u003eRobotics and automation equipment in humid or outdoor environments\u003c\/li\u003e\n\u003cli\u003eConsumer electronics and home appliances\u003c\/li\u003e\n\u003cli\u003eOutdoor machinery and equipment requiring corrosion-resistant fasteners\u003c\/li\u003e\n\u003cli\u003eBicycle frames, motorcycle components, and sporting equipment\u003c\/li\u003e\n\u003cli\u003eIndustrial fixtures requiring high strength and corrosion protection\u003c\/li\u003e\n\u003cli\u003eAny application requiring Grade 10.9 button head screws with RoHS-compliant zinc plating\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eDimensional Specifications — ISO 7380-1 (Unit: mm)\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eThread (d)\u003c\/th\u003e\n\u003cth\u003ePitch (p)\u003c\/th\u003e\n\u003cth\u003eHead Dia. dk Max.\u003c\/th\u003e\n\u003cth\u003eHead Dia. dk Min.\u003c\/th\u003e\n\u003cth\u003eHead Height k Max.\u003c\/th\u003e\n\u003cth\u003eHead Height k Min.\u003c\/th\u003e\n\u003cth\u003eKey Size s\u003c\/th\u003e\n\u003cth\u003eKey Depth t Min.\u003c\/th\u003e\n\u003cth\u003eBody Dia. ds Max.\u003c\/th\u003e\n\u003cth\u003eBody Dia. ds Min.\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eM3\u003c\/td\u003e\n\u003ctd\u003e0.5\u003c\/td\u003e\n\u003ctd\u003e5.70\u003c\/td\u003e\n\u003ctd\u003e5.50\u003c\/td\u003e\n\u003ctd\u003e1.65\u003c\/td\u003e\n\u003ctd\u003e1.35\u003c\/td\u003e\n\u003ctd\u003e2.0\u003c\/td\u003e\n\u003ctd\u003e0.74\u003c\/td\u003e\n\u003ctd\u003e3.00\u003c\/td\u003e\n\u003ctd\u003e2.86\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM4\u003c\/td\u003e\n\u003ctd\u003e0.7\u003c\/td\u003e\n\u003ctd\u003e7.60\u003c\/td\u003e\n\u003ctd\u003e7.36\u003c\/td\u003e\n\u003ctd\u003e2.20\u003c\/td\u003e\n\u003ctd\u003e1.80\u003c\/td\u003e\n\u003ctd\u003e2.5\u003c\/td\u003e\n\u003ctd\u003e1.05\u003c\/td\u003e\n\u003ctd\u003e4.00\u003c\/td\u003e\n\u003ctd\u003e3.82\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\u003e9.50\u003c\/td\u003e\n\u003ctd\u003e9.22\u003c\/td\u003e\n\u003ctd\u003e2.75\u003c\/td\u003e\n\u003ctd\u003e2.25\u003c\/td\u003e\n\u003ctd\u003e3.0\u003c\/td\u003e\n\u003ctd\u003e1.35\u003c\/td\u003e\n\u003ctd\u003e5.00\u003c\/td\u003e\n\u003ctd\u003e4.82\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM6\u003c\/td\u003e\n\u003ctd\u003e1.0\u003c\/td\u003e\n\u003ctd\u003e10.50\u003c\/td\u003e\n\u003ctd\u003e10.22\u003c\/td\u003e\n\u003ctd\u003e3.30\u003c\/td\u003e\n\u003ctd\u003e2.70\u003c\/td\u003e\n\u003ctd\u003e4.0\u003c\/td\u003e\n\u003ctd\u003e1.60\u003c\/td\u003e\n\u003ctd\u003e6.00\u003c\/td\u003e\n\u003ctd\u003e5.82\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\u003e14.00\u003c\/td\u003e\n\u003ctd\u003e13.57\u003c\/td\u003e\n\u003ctd\u003e4.40\u003c\/td\u003e\n\u003ctd\u003e3.60\u003c\/td\u003e\n\u003ctd\u003e5.0\u003c\/td\u003e\n\u003ctd\u003e2.20\u003c\/td\u003e\n\u003ctd\u003e8.00\u003c\/td\u003e\n\u003ctd\u003e7.78\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM10\u003c\/td\u003e\n\u003ctd\u003e1.5\u003c\/td\u003e\n\u003ctd\u003e17.50\u003c\/td\u003e\n\u003ctd\u003e17.05\u003c\/td\u003e\n\u003ctd\u003e5.50\u003c\/td\u003e\n\u003ctd\u003e4.50\u003c\/td\u003e\n\u003ctd\u003e6.0\u003c\/td\u003e\n\u003ctd\u003e2.75\u003c\/td\u003e\n\u003ctd\u003e10.00\u003c\/td\u003e\n\u003ctd\u003e9.78\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\u003e21.00\u003c\/td\u003e\n\u003ctd\u003e20.48\u003c\/td\u003e\n\u003ctd\u003e6.60\u003c\/td\u003e\n\u003ctd\u003e5.40\u003c\/td\u003e\n\u003ctd\u003e8.0\u003c\/td\u003e\n\u003ctd\u003e3.30\u003c\/td\u003e\n\u003ctd\u003e12.00\u003c\/td\u003e\n\u003ctd\u003e11.73\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\u003e28.00\u003c\/td\u003e\n\u003ctd\u003e27.48\u003c\/td\u003e\n\u003ctd\u003e8.80\u003c\/td\u003e\n\u003ctd\u003e7.20\u003c\/td\u003e\n\u003ctd\u003e10.0\u003c\/td\u003e\n\u003ctd\u003e4.40\u003c\/td\u003e\n\u003ctd\u003e16.00\u003c\/td\u003e\n\u003ctd\u003e15.73\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the difference between Zinc CR3 and traditional yellow zinc (Cr6+)?\u003c\/strong\u003e\u003cbr\u003e\nTraditional yellow zinc chromate uses hexavalent chromium (Cr6+), which is restricted under EU RoHS and REACH regulations. Zinc CR3 uses trivalent chromium (Cr3+), providing equivalent or better corrosion protection without any restricted substances. CR3 is the environmentally compliant replacement.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can Grade 10.9 button head screws handle the same torque as Grade 10.9 socket cap screws?\u003c\/strong\u003e\u003cbr\u003e\nNo. Due to the shallower socket depth in the button head design, the maximum recommended tightening torque is lower than for standard socket cap screws (DIN 912) of the same grade. Always use ISO 7380-1 specific torque values.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is GB 70.2?\u003c\/strong\u003e\u003cbr\u003e\nGB 70.2 is the Chinese national standard for button head socket cap screws, equivalent to ISO 7380-1. These screws comply with both standards and are interchangeable in most applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I get RoHS compliance documentation?\u003c\/strong\u003e\u003cbr\u003e\nYes. FULLERKREG provides RoHS compliance declarations, material certificates, and test reports upon request for all zinc CR3 plated products.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What corrosion resistance does Zinc CR3 provide?\u003c\/strong\u003e\u003cbr\u003e\nZinc CR3 plating typically provides 72–120 hours of salt spray resistance (per ISO 9227) before red rust appears, depending on plating thickness. This is significantly better than black oxide.\u003c\/p\u003e\n\n\u003ch2\u003ePackaging \u0026amp; Availability\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eStandard sizes M3 – M16 available in stock\u003c\/li\u003e\n\u003cli\u003eBulk carton packaging; small box and custom packaging available\u003c\/li\u003e\n\u003cli\u003eRoHS compliance documentation and material certificates available on request\u003c\/li\u003e\n\u003cli\u003ePPAP report and test reports available on request\u003c\/li\u003e\n\u003cli\u003eCustom lengths accepted for large orders\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eDownload Specification\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0054\/6317\/9375\/files\/ISO7380-1.pdf?v=1779069756\" title=\"ISO 7380-1 Button Head Socket Cap Screw Dimensional Specification PDF\"\u003eISO 7380-1 — Full Dimensional Specification (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0054\/6317\/9375\/files\/ISO898-1.pdf?v=1779071673\" title=\"ISO 898-1 Mechanical Properties of Fasteners\"\u003eISO 898-1 — Mechanical Properties of Fasteners (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\n\u003cp\u003eAll FULLERKREG ISO 7380-1 Grade 10.9 Zinc CR3 button head socket cap screws are manufactured under strict quality control procedures including:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRockwell hardness test (HRC 32–39)\u003c\/li\u003e\n\u003cli\u003eTensile strength test (min. 1,040 MPa)\u003c\/li\u003e\n\u003cli\u003eSalt spray corrosion test (zinc CR3 plating)\u003c\/li\u003e\n\u003cli\u003eRoHS substance verification — no hexavalent chromium (Cr6+)\u003c\/li\u003e\n\u003cli\u003eDimensional inspection per ISO 7380-1\u003c\/li\u003e\n\u003cli\u003eChemical composition analysis (10B21, B content verified)\u003c\/li\u003e\n\u003cli\u003ePPAP documentation available upon request\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor wholesale pricing, bulk orders, RoHS documentation, or technical inquiries, please \u003ca href=\"\/pages\/contact-us\"\u003econtact our sales team\u003c\/a\u003e.\u003c\/p\u003e","products":[],"url":"https:\/\/www.fullerkr.com\/collections\/iso-7380-button-head-socket-cap-screw-grade-10-9-zinc.oembed","provider":"Fullerkreg Fasteners","version":"1.0","type":"link"}