{"product_id":"value-collection-581794br-hex-socket-cap-screw-7-8-14-unf","title":"Value Collection 581794BR Hex Socket Cap Screw 7\/8-14 Unf","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VALUE COLLECTION 581794BR is a hex socket cap screw designed for high-strength fastening in demanding mechanical and structural applications. Machined from alloy steel with a black oxide finish, this fastener features a 7\/8-14 UNF thread size and a 5-inch length under head with partial threading. The 3\/4-inch hex drive accepts standard hex keys and socket drivers. The black oxide coating provides mild corrosion resistance and reduces surface reflectivity. This screw is manufactured to ASME\/ANSI B18.3 and ASTM A574 standards, making it suitable for applications requiring verified tensile and proof-load performance. Typically installed by machinists, millwrights, and mechanical contractors.\u003c\/p\u003e\u003cp\u003eThis fastener is suited for use in heavy equipment assembly, fixture building, machine frames, and general industrial fastening where a fine-thread UNF pattern is specified. The 7\/8-14 UNF thread pitch provides tighter thread engagement compared to coarse-thread equivalents, offering better resistance to vibration loosening. Partial threading allows the unthreaded shank to act as a pilot or load-bearing shoulder in appropriate joint designs.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e7\/8-14 UNF fine-thread for improved vibration resistance and precise fit\u003c\/li\u003e\n\u003cli\u003e5-inch length under head with partial threading for shoulder-fit joint designs\u003c\/li\u003e\n\u003cli\u003e3\/4-inch hex socket drive for use with standard hex keys or socket drivers\u003c\/li\u003e\n\u003cli\u003eAlloy steel construction meets ASTM A574 high-strength fastener requirements\u003c\/li\u003e\n\u003cli\u003eBlack oxide finish for mild corrosion resistance and low surface reflectivity\u003c\/li\u003e\n\u003cli\u003eConforms to ASME\/ANSI B18.3 dimensional standards\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard ASME\/ANSI B18.3 hex socket cap screw suitable for any application specifying a 7\/8-14 UNF partially threaded socket cap screw in alloy steel.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstall using a calibrated torque wrench with a 3\/4-inch hex bit to achieve proper clamp load without yielding the fastener. Always degrease mating threads or apply the specified thread lubricant before torquing to ensure accurate torque-to-tension results. De-energize and lock out all equipment before replacing fasteners on live machinery in accordance with applicable OSHA lockout\/tagout procedures. Inspect threads and seating surfaces for damage before installation.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 7\/8-14 UNF\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Under Head\u003c\/strong\u003e: 5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThreading\u003c\/strong\u003e: Partially Threaded\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrive Type\u003c\/strong\u003e: Hex Socket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrive Size\u003c\/strong\u003e: 3\/4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Alloy Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Black Oxide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFastener Standard\u003c\/strong\u003e: ASME\/ANSI B18.3, ASTM A574\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.01 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\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: 581794BR\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51717103059250,"sku":"581794BR","price":21.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/c6326b0f400a8fe1a577dd0a663c4a0f.jpg?v=1788535726","url":"https:\/\/voomisupply.com\/products\/value-collection-581794br-hex-socket-cap-screw-7-8-14-unf","provider":"Voomi Supply","version":"1.0","type":"link"}