{"product_id":"value-collection-581676br-hex-socket-cap-screw-5-8-18-unf","title":"Value Collection 581676BR Hex Socket Cap Screw 5\/8-18 Unf","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION 581676BR is a partially threaded hex socket cap screw designed for high-strength fastening in mechanical assemblies, tooling fixtures, and structural connections. It features a 5\/8-18 UNF thread form, a 3-inch length under head, and a 1\/2-inch hex drive socket. Manufactured from alloy steel and finished with a black oxide coating, this fastener delivers solid corrosion resistance in low-moisture environments while meeting ASME\/ANSI B18.3 and ASTM A574 standards. Machinists, millwrights, and maintenance technicians rely on socket cap screws like this one for applications where a low-profile head and high clamp load are required.\u003c\/p\u003e\n\u003cp\u003eThis screw is suited for precision mechanical work including machine frames, jigs, fixtures, and equipment housings where a recessed drive is preferred over external hex fasteners. The fine 18-threads-per-inch UNF pitch provides tighter thread engagement and improved resistance to vibration loosening compared to coarse-thread equivalents. The black oxide finish reduces light reflection and provides light surface protection. This fastener is sold individually with a minimum order quantity of 10 units per order.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e5\/8-18 UNF fine-thread profile for high vibration resistance and precise torque control\u003c\/li\u003e\n  \u003cli\u003e3-inch length under head accommodates thicker material stacks and deeper engagement\u003c\/li\u003e\n  \u003cli\u003e1\/2-inch hex socket drive for use with standard Allen keys and hex bit drivers\u003c\/li\u003e\n  \u003cli\u003eAlloy steel construction meets ASTM A574 high-strength socket screw requirements\u003c\/li\u003e\n  \u003cli\u003eBlack oxide finish provides light corrosion protection and low-reflectance appearance\u003c\/li\u003e\n  \u003cli\u003ePartially threaded shank allows for shoulder-style clamping and shear load transfer\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard ASME\/ANSI B18.3 hex socket cap screw for use in any application requiring a 5\/8-18 UNF partially threaded fastener with a 1\/2-inch hex drive.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is typically performed by machinists, millwrights, or maintenance technicians using a calibrated torque wrench and a 1\/2-inch hex key or socket bit. Always de-energize and lock out equipment before fastener work on live machinery per applicable OSHA lockout\/tagout procedures. Verify that mating threaded holes are clean, properly tapped to UNF specification, and free of debris before driving. Do not substitute this fine-thread fastener in applications requiring coarse-thread UNC engagement without confirming thread compatibility.\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 UNF\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Under Head\u003c\/strong\u003e: 3 inches\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: 1\/2 inch\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; ASTM A574\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 31161501\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.05 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: 581676BR\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51692852052274,"sku":"581676BR","price":40.63,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/40f56e4259167b9a55bc2d589e5d080e.jpg?v=1788304047","url":"https:\/\/voomisupply.com\/products\/value-collection-581676br-hex-socket-cap-screw-5-8-18-unf","provider":"Voomi Supply","version":"1.0","type":"link"}