{"product_id":"value-collection-581400pr-hex-socket-cap-screw-1-4-28-unf","title":"Value Collection 581400PR Hex Socket Cap Screw 1\/4-28 Unf","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION 581400PR is a hex socket cap screw designed for applications requiring a secure, high-strength fastener in tight or recessed spaces. Threaded to the 1\/4-28 UNF specification, this screw features a 3\/16-inch hex drive and measures 1-3\/8 inches in length under the head. It is partially threaded, making it well-suited for clamping and load-bearing joints where thread engagement is concentrated at the mating end. Constructed from alloy steel with a black oxide finish, the 581400PR meets ASME\/ANSI B18.3 and ASTM A574 standards. Machinists, millwrights, and mechanical contractors install this fastener across industrial assemblies, machine frames, and equipment maintenance applications.\u003c\/p\u003e\n\u003cp\u003eThis screw is used in precision mechanical assemblies, maintenance and repair operations, and OEM manufacturing where fine-thread engagement and controlled clamping force are required. The 1\/4-28 UNF thread pitch is common in applications that demand greater thread strength and resistance to vibration loosening compared to coarse-thread equivalents. The black oxide coating provides mild corrosion resistance and reduces light reflection, making it suitable for both exposed and enclosed assemblies in commercial and industrial environments.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1\/4-28 UNF fine thread for high-strength, vibration-resistant fastening\u003c\/li\u003e\n  \u003cli\u003e1-3\/8 inch length under head with partial threading for reliable clamping joints\u003c\/li\u003e\n  \u003cli\u003e3\/16-inch hex socket drive for use with standard Allen keys and hex drivers\u003c\/li\u003e\n  \u003cli\u003eAlloy steel construction meets ASTM A574 mechanical requirements\u003c\/li\u003e\n  \u003cli\u003eBlack oxide finish provides mild corrosion resistance and low-glare appearance\u003c\/li\u003e\n  \u003cli\u003eConforms to ASME\/ANSI B18.3 dimensional standards\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style and MRO replacement hex socket cap screw for industrial machinery, mechanical assemblies, and equipment requiring 1\/4-28 UNF fine-thread fasteners with a 3\/16-inch hex drive.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by machinists, millwrights, or mechanical technicians using a 3\/16-inch hex key or socket driver. Ensure mating threaded holes are clean and properly tapped to 1\/4-28 UNF before installation. De-energize and lock out equipment per applicable OSHA lockout\/tagout procedures before replacing or installing fasteners in live machinery. Do not substitute a coarse-thread screw in a fine-thread application, as cross-threading will damage the mating component.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/4-28 UNF\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Under Head\u003c\/strong\u003e: 1-3\/8 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThreading\u003c\/strong\u003e: Partial\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\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: 0.05 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: 581400PR\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51713699414322,"sku":"581400PR","price":10926.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6505b1f204c00b2919a6a237028e21d5.jpg?v=1788494862","url":"https:\/\/voomisupply.com\/products\/value-collection-581400pr-hex-socket-cap-screw-1-4-28-unf","provider":"Voomi Supply","version":"1.0","type":"link"}