{"title":"Socket Flanged Button Screws (ISO 7380-2) - High Tensile Steel (10.9) - Black","description":"\u003ch2\u003eFULLERKREG ISO 7380-2 Grade 10.9 Black Flanged Button Head Socket Cap Screws\u003c\/h2\u003e\n\u003cp\u003eFULLERKREG ISO 7380-2 Grade 10.9 Black Flanged Button Head Socket Cap Screws are high-strength fasteners featuring a low-profile dome-shaped button head with an integrated flange and a hexagon socket drive. Manufactured from 10B21 boron-alloyed steel with a black oxide surface treatment, these screws deliver Grade 10.9 tensile strength (min. 1,040 MPa) with the added benefit of a built-in flange that distributes clamping load over a significantly larger bearing area — eliminating the need for a separate washer in most applications. The flange also provides a positive seating surface that prevents the screw from pulling through thin or soft materials.\u003c\/p\u003e\n\n\u003ch2\u003eProduct Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard:\u003c\/strong\u003e ISO 7380-2 (2022)\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 Flanged button head (low-profile dome with integrated flange)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurface Treatment:\u003c\/strong\u003e Black oxide (blackening)\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 M4 – M16\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eISO 7380-2 vs ISO 7380-1 — Flanged vs Plain Button Head\u003c\/h2\u003e\n\u003cp\u003eThe key difference between ISO 7380-2 and ISO 7380-1 is the integrated flange. Understanding this helps you select the right fastener:\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eProperty\u003c\/th\u003e\n\u003cth\u003eISO 7380-2 Flanged (This Page)\u003c\/th\u003e\n\u003cth\u003eISO 7380-1 Plain Button Head\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eHead profile\u003c\/td\u003e\n\u003ctd\u003eLow dome + integrated flange\u003c\/td\u003e\n\u003ctd\u003eLow dome only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBearing surface area\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSignificantly larger (flange)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStandard button head\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWasher required?\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eNo — flange acts as integrated washer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSometimes yes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePull-through resistance\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSuperior\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLoad distribution\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eExcellent on thin\/soft materials\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAssembly efficiency\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eFaster — one fewer component\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOverall head height\u003c\/td\u003e\n\u003ctd\u003eSlightly taller (flange adds height)\u003c\/td\u003e\n\u003ctd\u003eLower profile\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBest for\u003c\/td\u003e\n\u003ctd\u003eThin panels, soft materials, high pull-through risk\u003c\/td\u003e\n\u003ctd\u003eGeneral low-profile applications\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eThe Flange Advantage — Why Choose ISO 7380-2?\u003c\/h2\u003e\n\u003cp\u003eThe integrated flange in ISO 7380-2 provides several engineering advantages over plain button head screws:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEliminates separate washer\u003c\/strong\u003e — reduces part count, assembly time, and risk of washer misalignment or loss\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuperior pull-through resistance\u003c\/strong\u003e — the flange distributes clamping load over a much larger area, preventing pull-through in thin sheet metal, plastic, and composite materials\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePositive seating\u003c\/strong\u003e — the flat flange underside provides a consistent, repeatable seating surface for accurate torque control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVibration resistance\u003c\/strong\u003e — larger bearing area reduces the risk of loosening under vibration\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClean appearance\u003c\/strong\u003e — integrated flange looks more finished than a separate washer assembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eMaterial — 10B21 Boron Steel Chemical Composition (%)\u003c\/h2\u003e\n\u003cp\u003eFULLERKREG ISO 7380-2 Grade 10.9 flanged 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\u003eBlack oxide (blackening)\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\u003eIntegrated flange\u003c\/strong\u003e — built-in washer function eliminates need for separate washer, reducing part count and assembly time\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade 10.9 high strength\u003c\/strong\u003e — 1,040 MPa tensile strength for demanding structural and mechanical joints\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuperior pull-through resistance\u003c\/strong\u003e — large flange bearing area prevents pull-through in thin sheet metal, plastic, and composite materials\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-profile button head\u003c\/strong\u003e — smooth dome design with clean aesthetic appearance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlack oxide finish\u003c\/strong\u003e — professional matte black appearance with minimal dimensional impact\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 7380-2 (2022) standard\u003c\/strong\u003e — latest revision compliance\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 7380-2 Grade 10.9 black flanged button head socket cap screws are widely used in:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThin sheet metal assemblies where pull-through resistance is critical\u003c\/li\u003e\n\u003cli\u003ePlastic and composite material fastening (large bearing area prevents crushing)\u003c\/li\u003e\n\u003cli\u003eAutomotive body panels and interior trim components\u003c\/li\u003e\n\u003cli\u003eRobotics and automation equipment frames\u003c\/li\u003e\n\u003cli\u003eElectronics enclosures and control panels\u003c\/li\u003e\n\u003cli\u003eBicycle frames, motorcycle components, and sporting equipment\u003c\/li\u003e\n\u003cli\u003eIndustrial machinery and equipment where washer elimination improves assembly efficiency\u003c\/li\u003e\n\u003cli\u003eAny application requiring Grade 10.9 button head screws with integrated washer function\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eDimensional Specifications — ISO 7380-2 (Unit: mm)\u003c\/h2\u003e\n\u003cp\u003eKey dimensions per ISO 7380-2 (2022). The flange diameter (dc) is the critical additional dimension vs. ISO 7380-1.\u003c\/p\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\u003eFlange Dia. dc Max.\u003c\/th\u003e\n\u003cth\u003eFlange Dia. dc 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\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\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\u003e9.40\u003c\/td\u003e\n\u003ctd\u003e9.00\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\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\u003e11.80\u003c\/td\u003e\n\u003ctd\u003e11.40\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\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\u003e13.60\u003c\/td\u003e\n\u003ctd\u003e13.20\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\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\u003e17.90\u003c\/td\u003e\n\u003ctd\u003e17.50\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\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\u003e22.30\u003c\/td\u003e\n\u003ctd\u003e21.80\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\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\u003e26.70\u003c\/td\u003e\n\u003ctd\u003e26.20\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\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\u003e35.70\u003c\/td\u003e\n\u003ctd\u003e35.20\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\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 plain button head socket cap screw with no flange. ISO 7380-2 adds an integrated flange under the button head, which significantly increases the bearing surface area. The flange acts as a built-in washer, eliminating the need for a separate washer in most applications and providing superior pull-through resistance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Do I still need a washer with ISO 7380-2 flanged button head screws?\u003c\/strong\u003e\u003cbr\u003e\nIn most applications, no. The integrated flange provides sufficient bearing area to replace a standard flat washer. However, for very soft materials or applications with specific sealing requirements, an additional washer may still be beneficial.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can Grade 10.9 flanged 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 7380-2 specific torque values.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the flange diameter for each size?\u003c\/strong\u003e\u003cbr\u003e\nPlease refer to the dimensional specifications table above. The flange diameter (dc) ranges from 9.0 mm for M4 to 35.2 mm minimum for M16.\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, hardness test reports, and tensile test reports are available upon request for all FULLERKREG products.\u003c\/p\u003e\n\n\u003ch2\u003ePackaging \u0026amp; Availability\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eStandard sizes M4 – M16 available in stock\u003c\/li\u003e\n\u003cli\u003eBulk carton packaging; small box and custom packaging available\u003c\/li\u003e\n\u003cli\u003eMaterial certificates and test reports available on request\u003c\/li\u003e\n\u003cli\u003ePPAP report 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\/ISO-7380-2-2022.pdf?v=1779083841\" title=\"ISO 7380-2 2022 Flanged Button Head Socket Cap Screw Dimensional Specification PDF\"\u003eISO 7380-2 (2022) — 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 7380-2 Grade 10.9 black flanged 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\u003eDimensional inspection per ISO 7380-2 (2022), including flange diameter verification\u003c\/li\u003e\n\u003cli\u003eChemical composition analysis (10B21, B content verified)\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, 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\/socket-flanged-button-screws-iso-7380-2-high-tensile-steel-10-9-black.oembed","provider":"Fullerkreg Fasteners","version":"1.0","type":"link"}