{"product_id":"value-collection-581555pr-hex-socket-cap-screw-1-2-13-unc","title":"Value Collection 581555PR Hex Socket Cap Screw 1\/2-13 Unc","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VALUE COLLECTION 581555PR is a hex socket cap screw designed for high-strength fastening applications in structural, mechanical, and industrial assemblies. The fastener measures 7-1\/2 inches in length under head with a 1\/2-13 UNC thread and is partially threaded along the shank. Drive engagement is through a 3\/8 inch hex socket. Constructed from alloy steel with a black oxide coating, the screw offers solid tensile strength and moderate corrosion resistance in controlled environments. It meets ASME\/ANSI B18.3 and ASTM A574 dimensional and mechanical standards. Machinists, maintenance mechanics, and industrial assembly technicians typically source this fastener for heavy-duty bolted connections.\u003c\/p\u003e\u003cp\u003eThis screw suits a wide range of industrial and commercial applications where a recessed hex drive is required for torque access in tight clearances. The partial thread shank provides a smooth grip zone useful for precision fit bolted joints, jigs, fixtures, and machine frames. It is appropriate for use in steel-on-steel assemblies where alignment and clamping load distribution matter. The black oxide finish keeps surface reflectivity low, which is useful in tooling and machinery environments.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e1\/2-13 UNC thread for broad compatibility with standard inch-series tapped holes\u003c\/li\u003e\n\u003cli\u003e7-1\/2 inch length under head accommodates deep stack-up or extended reach applications\u003c\/li\u003e\n\u003cli\u003ePartially threaded shank provides a smooth grip section for precision alignment\u003c\/li\u003e\n\u003cli\u003e3\/8 inch hex drive allows use of standard hex keys and socket drivers\u003c\/li\u003e\n\u003cli\u003eAlloy steel construction meets ASTM A574 mechanical requirements\u003c\/li\u003e\n\u003cli\u003eBlack oxide coating provides a low-reflectivity finish with mild corrosion resistance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard inch-series hex socket cap screw for use in any 1\/2-13 UNC tapped hole requiring a 7-1\/2 inch partially threaded fastener conforming to ASME\/ANSI B18.3 and ASTM A574.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed with a 3\/8 inch hex key or socket driver rated for the required torque load. Ensure the mating tapped hole is clean and free of debris before installation. Power down or de-energize any equipment before fastening components in live machinery. Follow applicable ASME or facility torque specifications for the joint material and thread class in use.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\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: 7-1\/2 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: 0.43 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: 581555PR\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51689601564978,"sku":"581555PR","price":6225.23,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/41debda321a940a1f8870ddba8a2ad7b.jpg?v=1788261700","url":"https:\/\/voomisupply.com\/products\/value-collection-581555pr-hex-socket-cap-screw-1-2-13-unc","provider":"Voomi Supply","version":"1.0","type":"link"}