{"title":"GB\/T 9074.13-1988 Cross Recessed Hexagon Bolt with Indentation, Single Coil Lock Washer and Plain Washer Assemblies - Stainless Steel A2","description":"\u003ch1\u003eGB\/T 9074.13-1988 Cross Recessed Hexagon Bolt with Indentation, Single Coil Lock Washer and Plain Washer Assemblies — Stainless Steel A2\u003c\/h1\u003e\n\n\u003cp\u003eFULLERKREG supplies GB\/T 9074.13-1988 stainless steel A2 SEMS screws — pre-assembled three-piece fastener assemblies combining a cross recessed hexagon bolt, a single coil spring lock washer, and a plain washer into one captive unit. Designed for high-efficiency assembly in electrical enclosures, sheet metal fabrication, and precision mechanical structures.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eWhat Are GB9074.13 Cross Recessed Hex SEMS Screws?\u003c\/h2\u003e\n\n\u003cp\u003eGB\/T 9074.13-1988 defines a three-piece pre-assembled fastener (SEMS) consisting of:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGB29.2\u003c\/strong\u003e — Cross recessed hexagon head bolt (Phillips drive, hex head)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGB9074.24\u003c\/strong\u003e — Plain washer (assembly-grade flat washer)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGB9074.26\u003c\/strong\u003e — Single coil spring lock washer (assembly-grade spring washer)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThe three components are permanently captivated onto the bolt shank before threading. After the thread is rolled, the outer thread diameter exceeds the inner diameter of the plain washer, making the assembly inseparable. This eliminates loose washers on the assembly line and dramatically reduces installation time.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eAssembly formula:\u003c\/strong\u003e GB9074.13 = GB29.2 + GB9074.24 + GB9074.26\u003c\/p\u003e\n\n\u003cp\u003eThe washer stack order from bolt head outward is: \u003cstrong\u003ePlain Washer → Spring Lock Washer → Bolt Head\u003c\/strong\u003e (the plain washer sits closest to the workpiece surface).\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eBenefits of Using GB9074.13 Cross Recessed Hex SEMS Screws\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eNo loose parts\u003c\/strong\u003e — washers are permanently captivated; no risk of dropped or missing washers during assembly\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eFaster installation\u003c\/strong\u003e — one-piece handling replaces three separate components; ideal for automated and manual assembly lines\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eCorrect washer sequence guaranteed\u003c\/strong\u003e — plain washer always contacts the workpiece; spring washer always contacts the bolt head flange\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eVibration resistance\u003c\/strong\u003e — the coil spring lock washer provides reliable anti-loosening performance under dynamic loads\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eDual drive flexibility\u003c\/strong\u003e — cross recessed (Phillips) drive on a hex head allows both manual screwdriver and power tool \/ wrench tightening\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eCorrosion resistance\u003c\/strong\u003e — A2 (SUS304) stainless steel with passivation finish for long service life in humid and mildly corrosive environments\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eReduced inventory complexity\u003c\/strong\u003e — one SKU replaces three separate fastener SKUs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eMaterial \u0026amp; Finish\u003c\/h2\u003e\n\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eProperty\u003c\/th\u003e\n      \u003cth\u003eSpecification\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMaterial\u003c\/td\u003e\n      \u003ctd\u003eA2 Stainless Steel (SUS304 \/ 18-8)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eSurface Finish\u003c\/td\u003e\n      \u003ctd\u003eNatural (Bright Passivated)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eProperty Class\u003c\/td\u003e\n      \u003ctd\u003eA2-70\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eTensile Strength\u003c\/td\u003e\n      \u003ctd\u003e≥ 700 MPa\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eYield Strength (0.2% proof)\u003c\/td\u003e\n      \u003ctd\u003e≥ 450 MPa\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eCorrosion Resistance\u003c\/td\u003e\n      \u003ctd\u003eExcellent — suitable for indoor, outdoor, and mildly corrosive environments\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMagnetic\u003c\/td\u003e\n      \u003ctd\u003eSlightly magnetic (work-hardened 304)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eRoHS Compliant\u003c\/td\u003e\n      \u003ctd\u003eYes\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eDimensions of Pre-Assembled Washers in GB9074.13 Hex Head SEMS Screws\u003c\/h2\u003e\n\n\u003cp\u003eWasher dimensions conform to \u003cstrong\u003eGB9074.24\u003c\/strong\u003e (plain washer) and \u003cstrong\u003eGB9074.26\u003c\/strong\u003e (spring lock washer). All dimensions in millimeters (mm).\u003c\/p\u003e\n\n\u003ch3\u003ePlain Washer Dimensions (GB9074.24)\u003c\/h3\u003e\n\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eThread Size\u003c\/th\u003e\n      \u003cth\u003eInner Dia. d₁ (mm)\u003c\/th\u003e\n      \u003cth\u003eOuter Dia. d₂ (mm)\u003c\/th\u003e\n      \u003cth\u003eThickness h (mm)\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\u003e4.3\u003c\/td\u003e\n\u003ctd\u003e9.0\u003c\/td\u003e\n\u003ctd\u003e0.8\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM5\u003c\/td\u003e\n\u003ctd\u003e5.3\u003c\/td\u003e\n\u003ctd\u003e10.0\u003c\/td\u003e\n\u003ctd\u003e1.0\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM6\u003c\/td\u003e\n\u003ctd\u003e6.4\u003c\/td\u003e\n\u003ctd\u003e12.0\u003c\/td\u003e\n\u003ctd\u003e1.6\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM8\u003c\/td\u003e\n\u003ctd\u003e8.4\u003c\/td\u003e\n\u003ctd\u003e16.0\u003c\/td\u003e\n\u003ctd\u003e1.6\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM10\u003c\/td\u003e\n\u003ctd\u003e10.5\u003c\/td\u003e\n\u003ctd\u003e20.0\u003c\/td\u003e\n\u003ctd\u003e2.0\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eSpring Lock Washer Dimensions (GB9074.26)\u003c\/h3\u003e\n\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eThread Size\u003c\/th\u003e\n      \u003cth\u003eInner Dia. d₁ (mm)\u003c\/th\u003e\n      \u003cth\u003eOuter Dia. d₂ (mm)\u003c\/th\u003e\n      \u003cth\u003eThickness s (mm)\u003c\/th\u003e\n      \u003cth\u003eWidth b (mm)\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\u003e4.1\u003c\/td\u003e\n\u003ctd\u003e7.1\u003c\/td\u003e\n\u003ctd\u003e0.9\u003c\/td\u003e\n\u003ctd\u003e1.5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM5\u003c\/td\u003e\n\u003ctd\u003e5.1\u003c\/td\u003e\n\u003ctd\u003e8.7\u003c\/td\u003e\n\u003ctd\u003e1.2\u003c\/td\u003e\n\u003ctd\u003e1.8\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM6\u003c\/td\u003e\n\u003ctd\u003e6.1\u003c\/td\u003e\n\u003ctd\u003e10.2\u003c\/td\u003e\n\u003ctd\u003e1.6\u003c\/td\u003e\n\u003ctd\u003e2.0\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM8\u003c\/td\u003e\n\u003ctd\u003e8.1\u003c\/td\u003e\n\u003ctd\u003e13.0\u003c\/td\u003e\n\u003ctd\u003e2.0\u003c\/td\u003e\n\u003ctd\u003e2.5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM10\u003c\/td\u003e\n\u003ctd\u003e10.2\u003c\/td\u003e\n\u003ctd\u003e16.2\u003c\/td\u003e\n\u003ctd\u003e2.5\u003c\/td\u003e\n\u003ctd\u003e3.0\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eDimensional Data — GB9074.13 SEMS Screw (A2 Stainless Steel)\u003c\/h2\u003e\n\n\u003cp\u003eAll dimensions in millimeters (mm). Bolt head dimensions per GB29.2. Nominal lengths per standard series.\u003c\/p\u003e\n\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eThread Size\u003c\/th\u003e\n      \u003cth\u003ePitch (mm)\u003c\/th\u003e\n      \u003cth\u003eHead Width Across Flats s (mm)\u003c\/th\u003e\n      \u003cth\u003eHead Width Across Corners e (mm)\u003c\/th\u003e\n      \u003cth\u003eHead Height k (mm)\u003c\/th\u003e\n      \u003cth\u003eCross Recess Depth (mm)\u003c\/th\u003e\n      \u003cth\u003eMin. Grip Length (mm)\u003c\/th\u003e\n      \u003cth\u003eNominal Length Range L (mm)\u003c\/th\u003e\n      \u003cth\u003eEst. Unit Weight (g\/pc) — M×16\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\u003c\/td\u003e\n\u003ctd\u003e7.66\u003c\/td\u003e\n\u003ctd\u003e2.8\u003c\/td\u003e\n\u003ctd\u003e1.8\u003c\/td\u003e\n\u003ctd\u003e10\u003c\/td\u003e\n\u003ctd\u003e10–40\u003c\/td\u003e\n\u003ctd\u003e≈ 1.5\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\u003e8\u003c\/td\u003e\n\u003ctd\u003e8.79\u003c\/td\u003e\n\u003ctd\u003e3.5\u003c\/td\u003e\n\u003ctd\u003e2.1\u003c\/td\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003ctd\u003e10–50\u003c\/td\u003e\n\u003ctd\u003e≈ 2.8\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\u003c\/td\u003e\n\u003ctd\u003e11.05\u003c\/td\u003e\n\u003ctd\u003e4.0\u003c\/td\u003e\n\u003ctd\u003e2.4\u003c\/td\u003e\n\u003ctd\u003e14\u003c\/td\u003e\n\u003ctd\u003e12–60\u003c\/td\u003e\n\u003ctd\u003e≈ 4.8\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\u003e13\u003c\/td\u003e\n\u003ctd\u003e14.38\u003c\/td\u003e\n\u003ctd\u003e5.3\u003c\/td\u003e\n\u003ctd\u003e3.0\u003c\/td\u003e\n\u003ctd\u003e18\u003c\/td\u003e\n\u003ctd\u003e16–80\u003c\/td\u003e\n\u003ctd\u003e≈ 10.5\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\u003e16\u003c\/td\u003e\n\u003ctd\u003e17.77\u003c\/td\u003e\n\u003ctd\u003e6.4\u003c\/td\u003e\n\u003ctd\u003e3.6\u003c\/td\u003e\n\u003ctd\u003e22\u003c\/td\u003e\n\u003ctd\u003e20–100\u003c\/td\u003e\n\u003ctd\u003e≈ 19.0\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003e\u003cem\u003eNote: Unit weights are approximate reference values for L=16mm. Actual weight varies with nominal length. Contact FULLERKREG for precise weight data for your specific length requirement.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eProduct Gallery\u003c\/h2\u003e\n\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"width:25%; text-align:center; padding:8px;\"\u003e \u003c\/td\u003e\n      \u003ctd style=\"width:25%; text-align:center; padding:8px;\"\u003e \u003c\/td\u003e\n      \u003ctd style=\"width:25%; text-align:center; padding:8px;\"\u003e \u003c\/td\u003e\n      \u003ctd style=\"width:25%; text-align:center; padding:8px;\"\u003e \u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\n\u003cp\u003eGB9074.13 cross recessed hex SEMS screws are widely used across industries where assembly efficiency, vibration resistance, and corrosion resistance are critical:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e⚡ \u003cstrong\u003eElectrical enclosures \u0026amp; control panels\u003c\/strong\u003e — secure panel covers, DIN rail brackets, and cable management components\u003c\/li\u003e\n  \u003cli\u003e🖥️ \u003cstrong\u003eElectronics \u0026amp; telecommunications equipment\u003c\/strong\u003e — chassis assembly, PCB mounting brackets, server rack hardware\u003c\/li\u003e\n  \u003cli\u003e🏭 \u003cstrong\u003eSheet metal fabrication\u003c\/strong\u003e — HVAC ductwork, switchgear cabinets, industrial enclosures\u003c\/li\u003e\n  \u003cli\u003e🚗 \u003cstrong\u003eAutomotive \u0026amp; transportation\u003c\/strong\u003e — interior trim panels, sensor brackets, lighting assemblies\u003c\/li\u003e\n  \u003cli\u003e🔧 \u003cstrong\u003eGeneral mechanical assembly\u003c\/strong\u003e — wherever pre-assembled washers eliminate loose-part handling on production lines\u003c\/li\u003e\n  \u003cli\u003e🌊 \u003cstrong\u003eMarine \u0026amp; outdoor equipment\u003c\/strong\u003e — A2 stainless steel provides reliable corrosion resistance in humid and salt-spray environments\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eWhy Choose FULLERKREG GB9074.13 SEMS Screws?\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e🏭 \u003cstrong\u003eDirect manufacturer\u003c\/strong\u003e — produced in-house to GB\/T 9074.13-1988 standard with full dimensional traceability\u003c\/li\u003e\n  \u003cli\u003e📦 \u003cstrong\u003eBulk wholesale supply\u003c\/strong\u003e — flexible MOQ, competitive pricing for OEM and MRO procurement\u003c\/li\u003e\n  \u003cli\u003e📐 \u003cstrong\u003eStrict dimensional control\u003c\/strong\u003e — 100% thread gauge inspection; washer captivation verified per standard\u003c\/li\u003e\n  \u003cli\u003e📋 \u003cstrong\u003eMaterial certification available\u003c\/strong\u003e — mill test reports and RoHS compliance documentation on request\u003c\/li\u003e\n  \u003cli\u003e🚀 \u003cstrong\u003eFast lead times\u003c\/strong\u003e — standard sizes held in stock; custom lengths available with short lead times\u003c\/li\u003e\n  \u003cli\u003e🌍 \u003cstrong\u003eGlobal export experience\u003c\/strong\u003e — export packaging, ISPM-15 compliant crating, and international logistics support\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003cp\u003e\u003cstrong\u003eStandard:\u003c\/strong\u003e GB\/T 9074.13-1988 | \u003cstrong\u003eMaterial:\u003c\/strong\u003e A2 Stainless Steel (SUS304) | \u003cstrong\u003eFinish:\u003c\/strong\u003e Bright Passivated | \u003cstrong\u003eProperty Class:\u003c\/strong\u003e A2-70 | \u003cstrong\u003eBrand:\u003c\/strong\u003e FULLERKREG\u003c\/p\u003e","products":[],"url":"https:\/\/www.fullerkr.com\/collections\/gb9074-13-a2.oembed","provider":"Fullerkreg Fasteners","version":"1.0","type":"link"}