{"product_id":"value-collection-721278br-flat-socket-cap-screw-5-8-18","title":"Value Collection 721278BR Flat Socket Cap Screw 5\/8-18","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION 721278BR is a flat socket cap screw designed for flush or countersunk fastening applications in mechanical assemblies, fixtures, and structural components. It features a 82-degree flat head driven by a 3\/8-inch hex socket, allowing the fastener to sit flush with or below the mating surface when installed in a properly countersunk hole. The screw measures 5\/8-18 UNF thread by 2 inches in overall length and is fully threaded. Constructed from alloy steel with a black oxide finish, it provides solid mechanical strength along with basic corrosion resistance in dry or lightly oiled environments. This fastener is installed by machinists, millwrights, maintenance technicians, and assembly professionals.\u003c\/p\u003e\n\u003cp\u003eThis flat socket cap screw is suited for applications where a smooth, low-profile surface is required after fastening. Common uses include machine frames, jigs and fixtures, tooling plates, motor mounts, and general industrial assemblies where an Allen-key-driven countersunk fastener is preferred over a hex bolt or standard button-head cap screw. The fine UNF thread pitch makes it appropriate for applications requiring precise clamp load or where vibration resistance is a consideration.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e82-degree flat head profile seats flush in standard countersunk holes\u003c\/li\u003e\n  \u003cli\u003e3\/8-inch hex socket drive for use with standard Allen or hex keys\u003c\/li\u003e\n  \u003cli\u003e5\/8-18 UNF fine thread for precise engagement and vibration resistance\u003c\/li\u003e\n  \u003cli\u003eFully threaded 2-inch length maximizes thread engagement across the full shank\u003c\/li\u003e\n  \u003cli\u003eAlloy steel construction meets ASME\/ANSI B18.3 and ASTM F835 standards\u003c\/li\u003e\n  \u003cli\u003eBlack oxide finish provides a uniform appearance and light surface protection\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard 5\/8-18 UNF flat socket cap screw conforming to ASME\/ANSI B18.3 and ASTM F835, suitable for use in any countersunk application requiring that thread size and drive type.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation requires a 3\/8-inch hex key or Allen driver. The mating hole must be countersunk to 82 degrees for proper head seating. Power down or de-energize any equipment before accessing fastener locations on machinery. Do not overtighten; torque to values specified in the applicable engineering drawings or assembly standards for 5\/8-18 alloy steel fasteners.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 5\/8-18\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 2 inches (overall)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNF\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThreading\u003c\/strong\u003e: Fully Threaded\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Type\u003c\/strong\u003e: 82-Degree Flat\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\/8 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 F835\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSystem of Measurement\u003c\/strong\u003e: Inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.01 pounds\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: 721278BR\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51694531576114,"sku":"721278BR","price":18.67,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/d4e14fa2f3ded20955a633a001935bb0_da2c7afd-b937-4482-8ef5-ac58abe5e431.jpg?v=1788325137","url":"https:\/\/voomisupply.com\/products\/value-collection-721278br-flat-socket-cap-screw-5-8-18","provider":"Voomi Supply","version":"1.0","type":"link"}