{"product_id":"value-collection-581551pr-hex-socket-cap-screw-1-2-13-unc","title":"Value Collection 581551PR Hex Socket Cap Screw 1\/2-13 Unc","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION 581551PR is a partially threaded hex socket cap screw designed for high-strength fastening in industrial, mechanical, and structural applications. It features a 1\/2-13 UNC thread size and measures 4.25 inches in length under the head. Driven with a 3\/8-inch hex key, this screw is manufactured from alloy steel and finished with a black oxide coating that provides mild corrosion resistance and a low-reflectance appearance. Licensed trades and maintenance professionals use this fastener wherever tensile strength and consistent clamping load are critical.\u003c\/p\u003e\n\u003cp\u003eThis screw is suited for machine assembly, tooling fixtures, heavy equipment maintenance, and general industrial fabrication where socket-head fasteners are specified. The 1\/2-13 UNC coarse thread engages quickly and resists cross-threading in typical shop and field conditions. The partial threading allows the unthreaded shank to function as a shoulder, which helps align mating components. It meets ASME\/ANSI B18.3 and ASTM A574 dimensional and mechanical property standards, making it appropriate for engineered assemblies that call out those specifications.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1\/2-13 UNC coarse thread for fast engagement and broad compatibility with standard tapped holes\u003c\/li\u003e\n  \u003cli\u003e4.25-inch length under head with partial threading, providing an unthreaded shank for component alignment\u003c\/li\u003e\n  \u003cli\u003e3\/8-inch hex drive for use with standard Allen keys and hex bit drivers\u003c\/li\u003e\n  \u003cli\u003eAlloy steel construction rated to ASTM A574 mechanical property requirements\u003c\/li\u003e\n  \u003cli\u003eBlack oxide finish for mild corrosion resistance and reduced surface reflectance\u003c\/li\u003e\n  \u003cli\u003eMeets ASME\/ANSI B18.3 dimensional standards for consistent fit across machined applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style or aftermarket replacement fastener for any application requiring a 1\/2-13 UNC partially threaded socket head cap screw conforming to ASME\/ANSI B18.3 and ASTM A574 standards.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by machinists, millwrights, maintenance technicians, or other qualified tradespeople using a 3\/8-inch hex key or socket bit. Always verify the tapped hole thread class and depth before installation. De-energize, depressurize, or otherwise make safe any equipment before replacing fasteners on live assemblies. Do not substitute a fastener of lower grade when an ASTM A574 alloy steel screw is specified by the design.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/2-13 UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Under Head\u003c\/strong\u003e: 4.25 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\/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 and ASTM A574\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.26 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: 581551PR\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51701096022322,"sku":"581551PR","price":11663.36,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/3825c6dc42a0411036678dfa8940558e.jpg?v=1788398165","url":"https:\/\/voomisupply.com\/products\/value-collection-581551pr-hex-socket-cap-screw-1-2-13-unc","provider":"Voomi Supply","version":"1.0","type":"link"}