{"product_id":"value-collection-721283br-flat-socket-cap-screw-5-8-18","title":"Value Collection 721283BR Flat Socket Cap Screw 5\/8-18","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION 721283BR is a flat socket cap screw designed for flush or countersunk fastening applications in mechanical assemblies, tooling, and structural components. It features an 82-degree flat head with a 3\/8-inch hex socket drive, allowing installation with a standard hex key or Allen wrench. The fastener measures 5\/8-18 UNF thread by 3-1\/2 inches in overall length and is partially threaded. Constructed from alloy steel with a black oxide finish, it provides solid mechanical strength with moderate corrosion resistance in dry or lightly oiled environments. Machinists, millwrights, and maintenance technicians are the typical installers.\u003c\/p\u003e\n\u003cp\u003eThis screw is suited for applications requiring a low-profile, countersunk head that sits flush with or below a mating surface. Common uses include machine tool fixtures, jigs, equipment frames, and fabricated steel assemblies where a protruding head would interfere with adjacent components or mating parts. The 5\/8-18 UNF thread pitch is a fine-thread designation, making it appropriate where vibration resistance or precise axial adjustment is needed. The partial threading allows for a smooth shank section under the head, which can improve shear strength in certain joint configurations.\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 high-torque installation with a hex key\u003c\/li\u003e\n  \u003cli\u003e5\/8-18 UNF fine-thread form resists loosening under vibration\u003c\/li\u003e\n  \u003cli\u003ePartially threaded shank improves shear load capacity in bolted joints\u003c\/li\u003e\n  \u003cli\u003eAlloy steel construction provides high tensile and yield strength\u003c\/li\u003e\n  \u003cli\u003eBlack oxide finish offers a clean appearance with light surface protection\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard-dimension replacement or maintenance fastener conforming to ASME\/ANSI B18.3 and ASTM F835 for flat socket cap screws in inch-series UNF applications.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is typically performed by machinists, millwrights, or maintenance mechanics using a 3\/8-inch hex key or T-handle driver. Ensure the mating countersink is machined to an 82-degree included angle to achieve full head seating. De-energize and lock out any equipment before fastener service in accordance with applicable OSHA lockout\/tagout procedures. Do not substitute this fine-thread UNF fastener in holes tapped for UNC thread without verifying 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: 5\/8-18\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 3-1\/2 inches (overall)\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\u003eThreading\u003c\/strong\u003e: Partially Threaded\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNF\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\u003eSystem of Measurement\u003c\/strong\u003e: Inch\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\u003eWeight\u003c\/strong\u003e: 0.01 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\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: 721283BR\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51691493097778,"sku":"721283BR","price":26.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/d4e14fa2f3ded20955a633a001935bb0_d9599b06-17b5-4f18-bb2a-2df9aaa6407f.jpg?v=1788285878","url":"https:\/\/voomisupply.com\/products\/value-collection-721283br-flat-socket-cap-screw-5-8-18","provider":"Voomi Supply","version":"1.0","type":"link"}