{"product_id":"value-collection-581381pr-hex-socket-cap-screw-1-4-20-unc","title":"Value Collection 581381PR Hex Socket Cap Screw 1\/4-20 Unc","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION 581381PR is a hex socket cap screw designed for high-strength fastening applications in mechanical assembly, fabrication, and maintenance work. Featuring a 1\/4-20 UNC thread and a 4-1\/2 inch length under head, this screw is partially threaded to provide clamping force where it matters most. The 3\/16 inch hex drive accepts a standard Allen wrench or hex bit. Constructed from alloy steel with a black oxide coating, it resists corrosion and surface wear under normal service conditions. Machinists, millwrights, and maintenance technicians commonly install this fastener type in equipment frames, fixtures, and structural assemblies.\u003c\/p\u003e\n\u003cp\u003eThis screw is suited for general industrial and mechanical applications where a partially threaded, socket-head cap screw is required. The 1\/4-20 UNC thread pitch is one of the most common inch-series coarse thread standards, making this a widely applicable replacement or new-installation fastener. The black oxide finish makes it appropriate for applications where mild corrosion resistance and a low-reflectance appearance are needed. It conforms to ASME\/ANSI B18.3 and ASTM A574 standards, which are the governing specifications for alloy steel hex socket cap screws in North American fastener practice.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1\/4-20 UNC coarse thread for broad compatibility with standard inch-series tapped holes\u003c\/li\u003e\n  \u003cli\u003e4-1\/2 inch length under head accommodates deeper grip and clamping requirements\u003c\/li\u003e\n  \u003cli\u003ePartially threaded shank provides shear strength and precise clamping\u003c\/li\u003e\n  \u003cli\u003e3\/16 inch hex socket drive for Allen wrench or hex bit installation\u003c\/li\u003e\n  \u003cli\u003eAlloy steel construction meets ASTM A574 mechanical property requirements\u003c\/li\u003e\n  \u003cli\u003eBlack oxide finish provides mild corrosion resistance and low-glare appearance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style or replacement hex socket cap screw for any application requiring a 1\/4-20 UNC partially threaded alloy steel fastener 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 using a 3\/16 inch hex key or Allen-head driver bit; ensure the drive tool seats fully before applying torque to avoid cam-out damage. Verify that the mating tapped hole is clean, properly threaded to 1\/4-20 UNC, and free of debris before installation. Apply a thread lubricant or anti-seize compound if specified by the equipment manufacturer for the application. Do not exceed the torsional capacity of the fastener or the thread-strip limit of the base material.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/4-20 UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Under Head\u003c\/strong\u003e: 4-1\/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\/16 inches\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\u003eWeight\u003c\/strong\u003e: 0.06 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: 581381PR\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51712104825138,"sku":"581381PR","price":1965.69,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/c9127b1fd15e607ce5fe959934e7045d.jpg?v=1788483902","url":"https:\/\/voomisupply.com\/products\/value-collection-581381pr-hex-socket-cap-screw-1-4-20-unc","provider":"Voomi Supply","version":"1.0","type":"link"}