{"product_id":"value-collection-221103pr-shoulder-screw-1-2-in-alloy-steel","title":"Value Collection 221103PR Shoulder Screw 1\/2 in Alloy Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION 221103PR is a Grade 8 alloy steel shoulder screw designed for precision fastening applications where a tight-tolerance bearing surface is required. The shoulder measures 0.5 inches in diameter and 0.625 inches in length, providing a hardened pivot or guide pin surface within the assembly. Drive engagement is via a 1\/4 inch hex socket. The fastener is finished uncoated, conforming to ANSI B18.3 and ASTM A574 standards. Machinists, maintenance technicians, and mechanical assembly professionals install this type of fastener in jigs, fixtures, linkages, and bearing retention setups.\u003c\/p\u003e\n\u003cp\u003eThis shoulder screw is suited for use in general industrial, manufacturing, and mechanical maintenance environments. The 3\/8-16 UNC thread engages standard tapped holes in steel, aluminum, and cast components. The 3\/4 inch head diameter and 5\/16 inch head height provide a positive seating surface against the mating part. It is commonly installed in fixture plates, die sets, pivot assemblies, and similar precision mechanical applications where the shoulder serves as the load-bearing surface rather than the thread.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e0.5 inch shoulder diameter with 0.625 inch shoulder length for precise clearance fits\u003c\/li\u003e\n  \u003cli\u003eGrade 8 alloy steel construction for high tensile and shear strength\u003c\/li\u003e\n  \u003cli\u003e3\/8-16 UNC thread standard for compatibility with common tapped holes\u003c\/li\u003e\n  \u003cli\u003e1\/4 inch hex socket drive for torque application with standard Allen keys or hex bits\u003c\/li\u003e\n  \u003cli\u003eUncoated finish — suitable for applications where coating buildup tolerance is critical\u003c\/li\u003e\n  \u003cli\u003eMeets ANSI B18.3, ASME\/ANSI B18.3, and ASTM A574 standards\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or stock fastener for mechanical assemblies requiring a 1\/2 inch diameter shoulder, 3\/8-16 UNC threaded shank, and hex socket drive in Grade 8 alloy steel.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by machinists or maintenance technicians using a 1\/4 inch hex key or socket bit driver. Ensure the tapped receiving hole is clean and meets 3\/8-16 UNC thread specifications before installation. The shoulder must seat fully against the mating surface to function as the load-bearing element — do not substitute thread engagement for shoulder support. Verify hole tolerances are appropriate for the intended fit class prior to assembly.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShoulder Diameter\u003c\/strong\u003e: 0.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShoulder Length\u003c\/strong\u003e: 0.625 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 3\/8-16 UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Diameter\u003c\/strong\u003e: 0.75 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Height\u003c\/strong\u003e: 0.3125 inches\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\/4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Alloy Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: 8\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Uncoated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.08 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: ANSI B18.3, ASME\/ANSI B18.3, ASTM A574\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 31161619\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: 221103PR\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51694620606770,"sku":"221103PR","price":1995.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/ffbd5b3db67b640d2a074883f5cbda50.jpg?v=1788326395","url":"https:\/\/voomisupply.com\/products\/value-collection-221103pr-shoulder-screw-1-2-in-alloy-steel","provider":"Voomi Supply","version":"1.0","type":"link"}