{"product_id":"value-collection-581816br-hex-socket-cap-screw-1-8-unc","title":"Value Collection 581816BR Hex Socket Cap Screw 1-8 Unc","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VALUE COLLECTION 581816BR is a hex socket cap screw designed for high-strength fastening applications in industrial, structural, and mechanical assemblies. This screw features a 1-8 UNC thread size with a 9.5-inch length under the head and a 3\/4-inch hex drive for use with a standard hex key or Allen wrench. Constructed from alloy steel with a black oxide coating, it delivers solid corrosion resistance and durability under load. The partial threading configuration allows for clamping force on non-threaded sections, making it well suited for heavy-duty bolted joints where thread engagement at the mating surface is required.\u003c\/p\u003e\u003cp\u003eThis cap screw is used in manufacturing, maintenance, and industrial fabrication environments where large-diameter, long-reach fasteners are needed. Typical applications include machine frames, structural steel assemblies, heavy equipment, and tooling fixtures. The black oxide finish provides mild corrosion protection and reduces light glare in precision environments. Installation is performed by machinists, millwrights, and maintenance technicians using a 3\/4-inch hex key or socket driver.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e1-8 UNC thread size for large-diameter fastening\u003c\/li\u003e\n\u003cli\u003e9.5-inch length under head for deep-reach or thick-stack applications\u003c\/li\u003e\n\u003cli\u003eAlloy steel construction for high tensile and shear strength\u003c\/li\u003e\n\u003cli\u003eBlack oxide coating for mild corrosion resistance and surface hardness retention\u003c\/li\u003e\n\u003cli\u003ePartially threaded shank provides clamping grip on unthreaded section\u003c\/li\u003e\n\u003cli\u003eMeets ASME\/ANSI B18.3 and ASTM A574 fastener standards\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard ASME\/ANSI B18.3 and ASTM A574 compliant hex socket cap screw suitable for 1-8 UNC threaded holes in industrial and mechanical assemblies requiring a partially threaded, large-diameter fastener.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by qualified machinists or maintenance personnel using a 3\/4-inch hex key or appropriate drive tool. Ensure the mating threaded hole is clean and correctly tapped to 1-8 UNC specification before installation. Power down and de-energize any equipment before servicing fastened assemblies. Do not use impact drivers at full torque without verifying joint specifications with engineering documentation.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1-8 UNC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Under Head\u003c\/strong\u003e: 9.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrive Type\u003c\/strong\u003e: Hex\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrive Size\u003c\/strong\u003e: 3\/4 inches\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: Alloy Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish Coating\u003c\/strong\u003e: Black Oxide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFastener Standard\u003c\/strong\u003e: ASME\/ANSI B18.3 and ASTM A574\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 9.93 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: 581816BR\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51708019540274,"sku":"581816BR","price":55.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/e2816fc3ea1a0de3ebbded6c00312548_9915682a-3d98-4cb5-a54e-693ccd68b8dc.jpg?v=1788443419","url":"https:\/\/voomisupply.com\/products\/value-collection-581816br-hex-socket-cap-screw-1-8-unc","provider":"Voomi Supply","version":"1.0","type":"link"}