{"product_id":"value-collection-211121pr-flat-socket-cap-screw-1-4-28-x-3-8-in","title":"Value Collection 211121PR Flat Socket Cap Screw 1\/4-28 X 3\/8 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION 211121PR is a flat socket cap screw designed for flush or countersunk fastening applications in precision assemblies. Manufactured from alloy steel with a black oxide finish, this screw features an 82-degree flat head profile and a 5\/32-inch hex socket drive. The 1\/4-28 UNF thread designation indicates a unified fine-thread standard, offering strong thread engagement in tapped holes. At 3\/8 inches in overall length and fully threaded, it is well suited for securing components where a low-profile head and a clean, finished appearance are required.\u003c\/p\u003e\n\u003cp\u003eThis screw is commonly used in machine tooling, jigs, fixtures, and mechanical assemblies where a countersunk fastener is necessary to keep surfaces flush. The black oxide finish provides moderate corrosion resistance and reduces light reflection, making it a practical choice in industrial, tooling, and manufacturing environments. Installation is performed by machinists, assemblers, and maintenance technicians using a 5\/32-inch hex key or Allen driver.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e82-degree flat head seats flush in standard countersunk holes per ASME\/ANSI B18.3\u003c\/li\u003e\n  \u003cli\u003e5\/32-inch hex socket drive for precise torque application with standard Allen keys\u003c\/li\u003e\n  \u003cli\u003e1\/4-28 UNF fully threaded shank for maximum thread engagement across the full 3\/8-inch length\u003c\/li\u003e\n  \u003cli\u003eAlloy steel construction for high tensile strength in demanding fastening applications\u003c\/li\u003e\n  \u003cli\u003eBlack oxide finish for moderate 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 an OEM-style replacement or standard fastener for applications requiring a 1\/4-28 UNF countersunk socket cap screw with an 82-degree flat head profile, conforming to ASME\/ANSI B18.3 and ASTM F835 standards.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed using a 5\/32-inch hex key or Allen driver seated fully in the socket to prevent cam-out and fastener damage. Ensure the mating countersink is machined to an 82-degree included angle to achieve proper head seating and flush surface contact. De-energize and lock out any equipment before servicing fasteners in live assemblies. Follow applicable torque guidelines per ASME B18.3 for alloy steel socket cap screws of this thread size.\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\u003c\/strong\u003e: 3\/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: 5\/32 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\u003eThread Standard\u003c\/strong\u003e: UNF\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\u003eSystem of Measurement\u003c\/strong\u003e: Inch\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: 211121PR\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51722392699186,"sku":"211121PR","price":1870.66,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/4259ea6357041c348be29e2b96e6bfe6.jpg?v=1788590449","url":"https:\/\/voomisupply.com\/products\/value-collection-211121pr-flat-socket-cap-screw-1-4-28-x-3-8-in","provider":"Voomi Supply","version":"1.0","type":"link"}