{"product_id":"value-collection-721587pr-flat-socket-cap-screw-4-40","title":"Value Collection 721587PR Flat Socket Cap Screw 4-40","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION 721587PR is a flat socket cap screw designed for applications requiring a flush or countersunk fastener profile. Manufactured from alloy steel with a black oxide finish, this screw features an 82-degree flat head and a 1\/16-inch hex socket drive. It is fully threaded along its 7\/8-inch overall length with a 4-40 UNC thread. The black oxide finish provides mild corrosion resistance and reduces light reflection, making it suitable for precision assemblies, jigs, fixtures, and light mechanical applications where a low-profile head is required.\u003c\/p\u003e\n\u003cp\u003eThis screw is suited for use in metal fabrication, instrumentation, electronics enclosures, and general mechanical assembly work. The 82-degree flat head seats flush with or below the surface of the mating material when installed in a properly countersunk hole. It is commonly used by machinists, maintenance technicians, and assembly professionals working with tapped metal components where a recessed fastener is needed to maintain a clean surface profile.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e82-degree flat head for flush countersunk installation\u003c\/li\u003e\n  \u003cli\u003e1\/16-inch hex socket drive for precision torque application\u003c\/li\u003e\n  \u003cli\u003eFully threaded 4-40 UNC along the entire 7\/8-inch length\u003c\/li\u003e\n  \u003cli\u003eAlloy steel construction for strength in light-duty fastening applications\u003c\/li\u003e\n  \u003cli\u003eBlack oxide finish for mild corrosion resistance and low-reflectance appearance\u003c\/li\u003e\n  \u003cli\u003eMeets ASME\/ANSI B18.3 and ASTM F835 fastener standards\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard 4-40 UNC flat socket cap screw for use in any tapped or threaded hole conforming to 4-40 UNC thread specifications and a countersunk seat machined to accept an 82-degree flat head.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed with a 1\/16-inch hex key or ball-end hex driver. The mating hole must be tapped to 4-40 UNC and countersunk to 82 degrees to achieve proper flush seating. Power down or de-energize any equipment before fastener replacement on electrical or mechanical assemblies. Avoid over-torquing, as alloy steel screws in small diameters can be susceptible to thread stripping in softer base materials.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 4-40\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 7\/8 inches (overall)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Type\u003c\/strong\u003e: 82-degree flat\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: 1\/16 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThreading\u003c\/strong\u003e: Fully threaded\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\u003eSystem of Measurement\u003c\/strong\u003e: Inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFastener Standard\u003c\/strong\u003e: ASME\/ANSI B18.3, ASTM F835\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.01 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: 721587PR\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51695441510706,"sku":"721587PR","price":4406.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/d4e14fa2f3ded20955a633a001935bb0_8d7acf89-e450-46bf-9d51-6b433ed4e303.jpg?v=1788335049","url":"https:\/\/voomisupply.com\/products\/value-collection-721587pr-flat-socket-cap-screw-4-40","provider":"Voomi Supply","version":"1.0","type":"link"}