{"product_id":"value-collection-581557pr-hex-socket-cap-screw-1-2-13-unc","title":"Value Collection 581557PR Hex Socket Cap Screw 1\/2-13 Unc","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VALUE COLLECTION 581557PR is a hex socket cap screw designed for high-strength fastening applications across industrial, mechanical, and structural assemblies. It features a 1\/2-13 UNC thread size and measures 8-1\/2 inches in length under the head. The screw is partially threaded and driven with a 3\/8-inch hex key. Constructed from alloy steel with a black oxide finish, this fastener delivers solid corrosion resistance and surface hardness suited to demanding environments. It conforms to ASME\/ANSI B18.3 and ASTM A574 standards, making it appropriate for load-bearing and precision fastening work where dimensional consistency and tensile strength matter.\u003c\/p\u003e\u003cp\u003eThis cap screw is suited for general industrial maintenance, machine assembly, tooling fixtures, and structural fabrication. The 1\/2-13 UNC coarse thread pitch is a common standard in North American manufacturing, making this fastener a practical replacement or stock item for maintenance shops, fabrication facilities, and production lines. Its longer 8-1\/2-inch under-head length makes it appropriate for thicker stack assemblies or deep-reach fastening situations where shorter fasteners are insufficient.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e1\/2-13 UNC coarse thread for compatibility with standard North American tapped holes\u003c\/li\u003e\n\u003cli\u003e8-1\/2 inch length under head for deep-reach and thick-stack fastening\u003c\/li\u003e\n\u003cli\u003ePartially threaded shank provides a bearing surface for shear-load applications\u003c\/li\u003e\n\u003cli\u003e3\/8-inch hex socket drive for use with standard hex keys and socket tooling\u003c\/li\u003e\n\u003cli\u003eAlloy steel construction meets ASTM A574 tensile strength requirements\u003c\/li\u003e\n\u003cli\u003eBlack oxide finish provides mild corrosion resistance and reduces light reflection\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard ASME\/ANSI B18.3 hex socket cap screw suitable for any application requiring a 1\/2-13 UNC partially threaded fastener with an 8-1\/2 inch under-head length.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstall using a 3\/8-inch hex key or socket driver. Ensure the tapped hole is clean and free of debris before threading to avoid cross-threading or galling. Apply appropriate thread lubricant or anti-seize compound when required by the application or ambient conditions. Power down or de-energize any equipment before performing fastener replacement on mechanical assemblies.\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: 8-1\/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: 0.46 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: 581557PR\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51717348819250,"sku":"581557PR","price":1065.13,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/17cd434f3c3b0c4d70578aa1953be847.jpg?v=1788538915","url":"https:\/\/voomisupply.com\/products\/value-collection-581557pr-hex-socket-cap-screw-1-2-13-unc","provider":"Voomi Supply","version":"1.0","type":"link"}