{"title":"ISO 7380 Button Head Socket Cap Screw A4 Stainless","description":"\u003ch2\u003eFULLERKREG ISO 7380-1 A4 Marine Stainless Steel Button Head Socket Cap Screws\u003c\/h2\u003e\n\u003cp\u003eFULLERKREG ISO 7380-1 A4 Marine Stainless Steel Button Head Socket Cap Screws are premium corrosion-resistant fasteners featuring a low-profile dome-shaped button head with a hexagon socket drive. Manufactured from A4 (SUS316) austenitic stainless steel with a passivated natural finish, these screws combine the clean aesthetic of the button head design with the superior corrosion resistance of marine-grade stainless steel. The addition of 2–3% molybdenum (Mo) in SUS316 provides dramatically better resistance to chlorides, saltwater, and acids compared to A2 (SUS304), making these the definitive choice for marine, coastal, chemical, and food processing environments.\u003c\/p\u003e\n\n\u003ch2\u003eProduct Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard:\u003c\/strong\u003e ISO 7380-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e A4 Marine Stainless Steel (SUS316 \/ 316 SS)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStrength Grade:\u003c\/strong\u003e A4-70\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTensile Strength:\u003c\/strong\u003e Min. 700 MPa\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProof Load Stress (Rp0.2):\u003c\/strong\u003e Min. 450 MPa\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardness:\u003c\/strong\u003e ≤95 HRB (max. 210 HV)\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 Passivation — natural silver finish (pickling \u0026amp; passivation)\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\u003eWhy A4 (SUS316) vs A2 (SUS304)?\u003c\/h2\u003e\n\u003cp\u003eThe molybdenum content in A4 is the critical differentiator for corrosive environments:\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eProperty\u003c\/th\u003e\n\u003cth\u003eA2 (SUS304)\u003c\/th\u003e\n\u003cth\u003eA4 (SUS316) — This Page\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eChromium (Cr)\u003c\/td\u003e\n\u003ctd\u003e18–20%\u003c\/td\u003e\n\u003ctd\u003e16–18%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNickel (Ni)\u003c\/td\u003e\n\u003ctd\u003e8–10.5%\u003c\/td\u003e\n\u003ctd\u003e10–14%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMolybdenum (Mo)\u003c\/td\u003e\n\u003ctd\u003eNone\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e2–3% (key advantage)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChloride resistance\u003c\/td\u003e\n\u003ctd\u003eGood\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eExcellent\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSaltwater \/ marine\u003c\/td\u003e\n\u003ctd\u003eLimited\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSuperior — recommended grade\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAcid resistance\u003c\/td\u003e\n\u003ctd\u003eModerate\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSuperior\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePitting corrosion resistance\u003c\/td\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSignificantly better\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrice point\u003c\/td\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003ctd\u003ePremium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eMaterial — A4 Marine Stainless Steel (SUS316) Chemical Composition (%)\u003c\/h2\u003e\n\u003cp\u003eAll 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 (max)\u003c\/th\u003e\n\u003cth\u003eSi (max)\u003c\/th\u003e\n\u003cth\u003eMn (max)\u003c\/th\u003e\n\u003cth\u003eP (max)\u003c\/th\u003e\n\u003cth\u003eS (max)\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\u003e16.00–18.00\u003c\/td\u003e\n\u003ctd\u003e10.00–14.00\u003c\/td\u003e\n\u003ctd\u003e2.00–3.00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eMechanical Properties — A4-70 (ISO 7380-1)\u003c\/h2\u003e\n\u003cp\u003ePer ISO 3506-1 requirements for A4-70 stainless steel fasteners.\u003c\/p\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. 700\u003c\/td\u003e\n\u003ctd\u003eMPa\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProof Load Stress (Rp0.2)\u003c\/td\u003e\n\u003ctd\u003eMin. 450\u003c\/td\u003e\n\u003ctd\u003eMPa\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHardness (max)\u003c\/td\u003e\n\u003ctd\u003e≤95 HRB \/ ≤210 HV\u003c\/td\u003e\n\u003ctd\u003eHRB \/ HV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElongation after fracture (A)\u003c\/td\u003e\n\u003ctd\u003eMin. 25\u003c\/td\u003e\n\u003ctd\u003e%\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\u003ePassivation (natural finish)\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\u003eLow-profile button head\u003c\/strong\u003e — smooth dome design, approximately 50% lower than standard socket cap screws, ideal for aesthetic and space-constrained applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide bearing surface\u003c\/strong\u003e — larger head diameter distributes load over a greater area, reducing pull-through risk in soft or thin materials\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA4 Marine Stainless Steel (SUS316)\u003c\/strong\u003e — the highest corrosion resistance among standard stainless steel fastener grades\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMolybdenum-enhanced alloy\u003c\/strong\u003e — 2–3% Mo content provides outstanding pitting and crevice corrosion resistance in chloride environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePassivated natural finish\u003c\/strong\u003e — clean silver appearance with enhanced oxide layer for maximum rust resistance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNon-magnetic\u003c\/strong\u003e — suitable for applications sensitive to magnetic interference\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHygienic \u0026amp; food-safe\u003c\/strong\u003e — compliant for food processing, pharmaceutical, and medical equipment use\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoHS \u0026amp; REACH compliant\u003c\/strong\u003e — no restricted hazardous substances\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO\/TS16949 quality management\u003c\/strong\u003e — hardness test, tensile 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 A4 marine stainless steel button head socket cap screws are widely used in demanding corrosive environments:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMarine vessels, boat fittings, and dock structures\u003c\/li\u003e\n\u003cli\u003eOffshore platforms and coastal architectural hardware\u003c\/li\u003e\n\u003cli\u003eDesalination and water treatment equipment\u003c\/li\u003e\n\u003cli\u003eChemical processing and petrochemical plants\u003c\/li\u003e\n\u003cli\u003eFood and beverage processing machinery\u003c\/li\u003e\n\u003cli\u003ePharmaceutical and medical device manufacturing\u003c\/li\u003e\n\u003cli\u003eSwimming pools, aquatic facilities, and spa equipment\u003c\/li\u003e\n\u003cli\u003eOutdoor signage and architectural panels in coastal areas\u003c\/li\u003e\n\u003cli\u003eAny application where A2 (SUS304) is insufficient due to chloride or acid exposure\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCorrosion Resistance Guide — A4 (SUS316)\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eEnvironment\u003c\/th\u003e\n\u003cth\u003eA4 (SUS316) Performance\u003c\/th\u003e\n\u003cth\u003eRecommendation\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eIndoor \/ dry environments\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003ctd\u003e✅ Ideal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor \/ atmospheric exposure\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003ctd\u003e✅ Ideal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMarine \/ saltwater (direct)\u003c\/td\u003e\n\u003ctd\u003eVery good\u003c\/td\u003e\n\u003ctd\u003e✅ Recommended grade\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOffshore \/ coastal structures\u003c\/td\u003e\n\u003ctd\u003eVery good\u003c\/td\u003e\n\u003ctd\u003e✅ Recommended grade\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFood \u0026amp; pharmaceutical processing\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003ctd\u003e✅ Ideal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChemical processing (mild acids)\u003c\/td\u003e\n\u003ctd\u003eVery good\u003c\/td\u003e\n\u003ctd\u003e✅ Suitable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChloride-rich environments\u003c\/td\u003e\n\u003ctd\u003eVery good\u003c\/td\u003e\n\u003ctd\u003e✅ Recommended grade\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSwimming pools \/ aquatic facilities\u003c\/td\u003e\n\u003ctd\u003eVery good\u003c\/td\u003e\n\u003ctd\u003e✅ Recommended grade\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStrong oxidizing acids\u003c\/td\u003e\n\u003ctd\u003eModerate\u003c\/td\u003e\n\u003ctd\u003e⚠️ Consult technical team\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\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 ISO 7380-1 and ISO 7380-2?\u003c\/strong\u003e\u003cbr\u003e\nISO 7380-1 is the standard button head socket cap screw with a plain button head. ISO 7380-2 features a button head with a flange (wider bearing surface). This page covers ISO 7380-1 (no flange).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why choose A4 over A2 for button head screws?\u003c\/strong\u003e\u003cbr\u003e\nIf your application involves saltwater, marine environments, chloride exposure, or aggressive chemicals, A4 (SUS316) is the correct choice. The 2–3% molybdenum content in A4 provides significantly better pitting corrosion resistance than A2 (SUS304).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can button head screws handle the same torque as socket cap screws?\u003c\/strong\u003e\u003cbr\u003e\nNo. Due to the shallower socket depth in the button head, the maximum recommended tightening torque is lower than for standard socket cap screws (DIN 912). Button head screws are not recommended for high-torque structural joints.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Are A4 button head screws magnetic?\u003c\/strong\u003e\u003cbr\u003e\nA4 stainless steel is generally non-magnetic in the annealed state. Cold working during manufacturing may induce slight magnetism. For strictly non-magnetic applications, please confirm with our technical team.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I get material certificates and test reports?\u003c\/strong\u003e\u003cbr\u003e\nYes. PPAP reports, material certificates (mill certificates with Mo content verification), hardness test reports, and tensile test reports are available upon request.\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; custom packaging available\u003c\/li\u003e\n\u003cli\u003eMaterial certificates (including Mo content verification) 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\u003c\/ul\u003e\n\n\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\n\u003cp\u003eAll FULLERKREG ISO 7380-1 A4 marine stainless steel button head socket cap screws are manufactured under strict quality control procedures including:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHardness test (≤95 HRB)\u003c\/li\u003e\n\u003cli\u003eTensile strength test (min. 700 MPa)\u003c\/li\u003e\n\u003cli\u003eDimensional inspection per ISO 7380-1\u003c\/li\u003e\n\u003cli\u003eChemical composition verification (SUS316, Mo content confirmed)\u003c\/li\u003e\n\u003cli\u003eSalt spray corrosion test\u003c\/li\u003e\n\u003cli\u003ePPAP documentation available upon request\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor wholesale pricing, bulk orders, material certificates, or technical inquiries, please \u003ca href=\"\/pages\/contact-us\"\u003econtact our sales team\u003c\/a\u003e.\u003c\/p\u003e","products":[{"product_id":"107374","title":"M3-0.5x6 ISO7380 A4-70 Stainless Steel Hexagon Socket Button Head Screw Fully Threaded - 5000 Pcs per Carton","description":"","brand":"fullerkreg","offers":[{"title":"Default Title","offer_id":53839351709807,"sku":"107374","price":35.97,"currency_code":"USD","in_stock":false}]},{"product_id":"320826","title":"M3-0.5x6 ISO7380 A4-70 Stainless Steel Hexagon Socket Button Head Screw Fully Threaded - 36000 Pcs per Carton","description":"","brand":"fullerkreg","offers":[{"title":"Default Title","offer_id":53839352463471,"sku":"320826","price":252.0,"currency_code":"USD","in_stock":true}]},{"product_id":"107375","title":"M3-0.5x8 ISO7380 A4-70 Stainless Steel Hexagon Socket Button Head Screw Fully Threaded - 45000 Pcs per Carton","description":"","brand":"fullerkreg","offers":[{"title":"Default Title","offer_id":53839352758383,"sku":"107375","price":360.0,"currency_code":"USD","in_stock":false}]},{"product_id":"320834","title":"M3-0.5x8 ISO7380 A4-70 Stainless Steel Hexagon Socket Button Head Screw Fully Threaded - 32400 Pcs per Carton","description":"","brand":"fullerkreg","offers":[{"title":"Default Title","offer_id":53839353380975,"sku":"320834","price":259.2,"currency_code":"USD","in_stock":true}]},{"product_id":"107376","title":"M3-0.5x10 ISO7380 A4-70 Stainless Steel Hexagon Socket Button Head Screw Fully Threaded - 27000 Pcs per Carton","description":"","brand":"fullerkreg","offers":[{"title":"Default Title","offer_id":53839353839727,"sku":"107376","price":243.0,"currency_code":"USD","in_stock":true}]},{"product_id":"107377","title":"M3-0.5x12 ISO7380 A4-70 Stainless Steel Hexagon Socket Button Head Screw Fully Threaded - 30000 Pcs per Carton","description":"","brand":"fullerkreg","offers":[{"title":"Default Title","offer_id":53839354495087,"sku":"107377","price":300.0,"currency_code":"USD","in_stock":false}]},{"product_id":"320849","title":"M3-0.5x12 ISO7380 A4-70 Stainless Steel Hexagon Socket Button Head Screw Fully Threaded - 27000 Pcs per Carton","description":"","brand":"fullerkreg","offers":[{"title":"Default Title","offer_id":53839355281519,"sku":"320849","price":270.0,"currency_code":"USD","in_stock":true}]},{"product_id":"107050","title":"M3-0.5x14 ISO7380 A4-70 Stainless Steel Hexagon Socket Button Head Screw Fully Threaded - 21600 Pcs per Carton","description":"","brand":"fullerkreg","offers":[{"title":"Default Title","offer_id":53839355412591,"sku":"107050","price":237.6,"currency_code":"USD","in_stock":false}]},{"product_id":"107051","title":"M3-0.5x16 ISO7380 A4-70 Stainless Steel Hexagon Socket Button Head Screw Fully Threaded - 14400 Pcs per Carton","description":"","brand":"fullerkreg","offers":[{"title":"Default Title","offer_id":53839356330095,"sku":"107051","price":172.8,"currency_code":"USD","in_stock":true}]},{"product_id":"107052","title":"M3-0.5x18 ISO7380 A4-70 Stainless Steel Hexagon Socket Button Head Screw Fully Threaded - 18000 Pcs per Carton","description":"","brand":"fullerkreg","offers":[{"title":"Default Title","offer_id":53839357673583,"sku":"107052","price":252.0,"currency_code":"USD","in_stock":false}]},{"product_id":"107053","title":"M3-0.5x20 ISO7380 A4-70 Stainless Steel Hexagon Socket Button Head Screw Fully Threaded - 18000 Pcs per Carton","description":"","brand":"fullerkreg","offers":[{"title":"Default Title","offer_id":53839358132335,"sku":"107053","price":270.0,"currency_code":"USD","in_stock":false}]},{"product_id":"320876","title":"M3-0.5x20 ISO7380 A4-70 Stainless Steel Hexagon Socket Button Head Screw Fully Threaded - 18000 Pcs per Carton","description":"","brand":"fullerkreg","offers":[{"title":"Default Title","offer_id":53839358656623,"sku":"320876","price":270.0,"currency_code":"USD","in_stock":true}]},{"product_id":"107054","title":"M3-0.5x22 ISO7380 A4-70 Stainless Steel Hexagon Socket Button Head Screw Fully Threaded - 14400 Pcs per Carton","description":"","brand":"fullerkreg","offers":[{"title":"Default Title","offer_id":53839359279215,"sku":"107054","price":230.4,"currency_code":"USD","in_stock":false}]},{"product_id":"107055","title":"M3-0.5x25 ISO7380 A4-70 Stainless Steel Hexagon Socket Button Head Screw Fully Threaded - 14000 Pcs per Carton","description":"","brand":"fullerkreg","offers":[{"title":"Default Title","offer_id":53839359803503,"sku":"107055","price":252.0,"currency_code":"USD","in_stock":true}]},{"product_id":"320888","title":"M3-0.5x25 ISO7380 A4-70 Stainless Steel Hexagon Socket Button Head Screw Fully Threaded - 12600 Pcs per Carton","description":"","brand":"fullerkreg","offers":[{"title":"Default Title","offer_id":53839359967343,"sku":"320888","price":226.8,"currency_code":"USD","in_stock":true}]},{"product_id":"107056","title":"M3-0.5x30 ISO7380 A4-70 Stainless Steel Hexagon Socket Button Head Screw Fully Threaded - 12000 Pcs per Carton","description":"","brand":"fullerkreg","offers":[{"title":"Default Title","offer_id":53839360884847,"sku":"107056","price":240.0,"currency_code":"USD","in_stock":true}]},{"product_id":"107057","title":"M4-0.7x6 ISO7380 A4-70 Stainless Steel Hexagon Socket Button Head Screw Fully Threaded - 26000 Pcs per Carton","description":"","brand":"fullerkreg","offers":[{"title":"Default Title","offer_id":53839361146991,"sku":"107057","price":312.0,"currency_code":"USD","in_stock":false}]},{"product_id":"320906","title":"M4-0.7x6 ISO7380 A4-70 Stainless Steel Hexagon Socket Button Head Screw Fully Threaded - 18000 Pcs per Carton","description":"","brand":"fullerkreg","offers":[{"title":"Default Title","offer_id":53839361769583,"sku":"320906","price":198.0,"currency_code":"USD","in_stock":true}]},{"product_id":"107058","title":"M4-0.7x8 ISO7380 A4-70 Stainless Steel Hexagon Socket Button Head Screw Fully Threaded - 20000 Pcs per Carton","description":"","brand":"fullerkreg","offers":[{"title":"Default Title","offer_id":53839362097263,"sku":"107058","price":280.0,"currency_code":"USD","in_stock":false}]},{"product_id":"320914","title":"M4-0.7x8 ISO7380 A4-70 Stainless Steel Hexagon Socket Button Head Screw Fully Threaded - 14400 Pcs per Carton","description":"","brand":"fullerkreg","offers":[{"title":"Default Title","offer_id":53839362490479,"sku":"320914","price":187.2,"currency_code":"USD","in_stock":true}]},{"product_id":"107059","title":"M4-0.7x10 ISO7380 A4-70 Stainless Steel Hexagon Socket Button Head Screw Fully Threaded - 18000 Pcs per Carton","description":"","brand":"fullerkreg","offers":[{"title":"Default Title","offer_id":53839363604591,"sku":"107059","price":270.0,"currency_code":"USD","in_stock":false}]},{"product_id":"320923","title":"M4-0.7x10 ISO7380 A4-70 Stainless Steel Hexagon Socket Button Head Screw Fully Threaded - 14400 Pcs per Carton","description":"","brand":"fullerkreg","offers":[{"title":"Default Title","offer_id":53839363899503,"sku":"320923","price":201.6,"currency_code":"USD","in_stock":true}]},{"product_id":"107060","title":"M4-0.7x12 ISO7380 A4-70 Stainless Steel Hexagon Socket Button Head Screw Fully Threaded - 16000 Pcs per Carton","description":"","brand":"fullerkreg","offers":[{"title":"Default Title","offer_id":53839364194415,"sku":"107060","price":272.0,"currency_code":"USD","in_stock":false}]},{"product_id":"320932","title":"M4-0.7x12 ISO7380 A4-70 Stainless Steel Hexagon Socket Button Head Screw Fully Threaded - 14400 Pcs per Carton","description":"","brand":"fullerkreg","offers":[{"title":"Default Title","offer_id":53839364817007,"sku":"320932","price":230.4,"currency_code":"USD","in_stock":true}]},{"product_id":"107062","title":"M4-0.7x16 ISO7380 A4-70 Stainless Steel Hexagon Socket Button Head Screw Fully Threaded - 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