{"product_id":"value-collection-d39202-hex-head-cap-screw-7-8-9-x-4-5-in-grade-8","title":"Value Collection D39202 Hex Head Cap Screw 7\/8-9 X 4.5 in Grade 8","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION D39202 is a partially threaded hex head cap screw designed for high-strength fastening applications in industrial, mechanical, and construction assemblies. Manufactured from Grade 8 steel with a zinc yellow dichromate finish, this fastener delivers elevated tensile and proof load strength compared to lower-grade alternatives. The 7\/8-9 UNC thread size and 4-1\/2 inch length under head make it well suited for heavy-duty bolted joints where reliable clamping force is required. The zinc yellow dichromate coating provides corrosion resistance while serving as a visual identifier of Grade 8 classification.\u003c\/p\u003e\n\u003cp\u003eThis cap screw is used in structural, equipment mounting, and machinery assembly applications where ASME B18.2.1 and SAE J429 Grade 8 compliance is specified. The partial threading allows for a smooth shank section that bears shear loads more effectively than a fully threaded fastener, making it appropriate for applications with close-tolerance bores or joints subject to lateral forces. Machinists, millwrights, and maintenance technicians commonly install this type of fastener in equipment frames, flanges, and heavy mechanical assemblies.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eGrade 8 steel construction meets SAE J429 high-strength fastener requirements\u003c\/li\u003e\n  \u003cli\u003ePartially threaded shank improves shear load performance in bolted joints\u003c\/li\u003e\n  \u003cli\u003eZinc yellow dichromate finish provides corrosion resistance and serves as a Grade 8 visual indicator\u003c\/li\u003e\n  \u003cli\u003e7\/8-9 UNC thread form for broad compatibility with standard inch-series nuts and tapped holes\u003c\/li\u003e\n  \u003cli\u003eConforms to ASME B18.2.1 dimensional standards for hex head cap screws\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard inch-series hex head cap screw for use with 7\/8-9 UNC nuts, washers, and tapped holes in applications requiring ASME B18.2.1 and SAE J429 Grade 8 compliant fasteners.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstall with an appropriate hex socket or open-end wrench sized for the 7\/8-9 fastener. Use a calibrated torque wrench when a specific clamp load is required by the assembly specification. Always use a hardened flat washer under the head when bearing on softer materials. Inspect threads and mating tapped holes for damage before installation to ensure proper thread engagement.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 7\/8-9\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Under Head\u003c\/strong\u003e: 4-1\/2 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThreading\u003c\/strong\u003e: Partially Threaded\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: Grade 8\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Zinc Yellow Dichromate\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: ASME B18.2.1, SAE J429\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSystem of Measurement\u003c\/strong\u003e: Inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMinimum Order Quantity\u003c\/strong\u003e: 10\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: VALUE COLLECTION\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: D39202\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51710663852338,"sku":"D39202","price":43.56,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f267a2a726980e4610cbe3a129d68298.jpg?v=1788469250","url":"https:\/\/voomisupply.com\/products\/value-collection-d39202-hex-head-cap-screw-7-8-9-x-4-5-in-grade-8","provider":"Voomi Supply","version":"1.0","type":"link"}