{"product_id":"value-collection-33721-2-hex-socket-cap-screw-1-1-4-7-unc","title":"Value Collection -33721-2 Hex Socket Cap Screw 1-1\/4-7 Unc","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VALUE COLLECTION -33721-2 is a hex socket cap screw designed for high-strength bolted assemblies in industrial, mechanical, and structural applications. Manufactured from alloy steel with a black oxide finish, this fastener meets ASME\/ANSI B18.3 and ASTM A574 standards, confirming it is engineered to handle demanding torque and load requirements. The 1-1\/4-7 UNC thread size and 4-inch length under head make it suited for thick-stock clamping situations. Drive engagement is via a 7\/8-inch hex socket, compatible with standard socket drive tooling. Threading is partial, meaning the unthreaded shank provides a precise shear-load bearing surface commonly required in close-tolerance joint designs.\u003c\/p\u003e\u003cp\u003eThis cap screw is used across a wide range of industrial environments including heavy equipment assembly, machine tool fabrication, structural steel connections, and maintenance repair operations. The partially threaded configuration is a deliberate design choice in applications where the bolt shank must bear lateral shear loads without relying on thread engagement in the joint interface. It is installed by machinists, millwrights, and maintenance technicians wherever high-strength UNC fasteners are required.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eThread size 1-1\/4-7 UNC for heavy-duty clamping applications\u003c\/li\u003e\n\u003cli\u003e4-inch length under head accommodates thick-stock assemblies\u003c\/li\u003e\n\u003cli\u003ePartially threaded shank provides shear-load bearing surface\u003c\/li\u003e\n\u003cli\u003e7\/8-inch hex socket drive for positive torque transfer\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 reduces light reflection in machined assemblies\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style and MRO replacement hex socket cap screw for industrial assemblies requiring 1-1\/4-7 UNC partially threaded fasteners conforming to ASME\/ANSI B18.3 and ASTM A574 standards.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified mechanic or millwright using a calibrated torque wrench and the appropriate 7\/8-inch hex socket. Always clean and inspect threaded holes before installation and ensure thread engagement depth meets engineering specifications for the joint. Apply thread lubricant or anti-seize only if specified by the assembly drawing, as lubrication significantly affects torque-to-clamp-force relationships. De-energize and lock out all equipment before performing any fastener service on machinery.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1-1\/4-7 UNC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Under Head\u003c\/strong\u003e: 4 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: 7\/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, ASTM A574\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 31161501\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.01 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: -33721-2\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51716445798706,"sku":"-33721-2","price":63.67,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/ac662f62d0b27cfc1602c250aa54e2ea.jpg?v=1788526239","url":"https:\/\/voomisupply.com\/products\/value-collection-33721-2-hex-socket-cap-screw-1-1-4-7-unc","provider":"Voomi Supply","version":"1.0","type":"link"}