{"product_id":"value-collection-225121pr-shoulder-screw-1-2-in-4140-steel","title":"Value Collection 225121PR Shoulder Screw 1\/2 in 4140 Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION 225121PR is a hex socket shoulder screw machined from 4140 alloy steel, designed for precise locating, pivoting, and bearing retention applications in mechanical assemblies. It features a 1\/2-inch shoulder diameter and a 2-inch shoulder length, providing a smooth, ground surface that acts as a bearing or pivot pin within a bored hole. The 3\/8-16 UNC threaded section draws the screw firmly into the mating component, while the 3\/4-inch diameter head seats cleanly against the surface. Drive engagement is through a 1\/4-inch hex socket, requiring an Allen key or hex bit driver for installation. Machinists, maintenance technicians, and mechanical assemblers are the primary installers.\u003c\/p\u003e\n\u003cp\u003eThis shoulder screw is suited for use in fixtures, jigs, dies, machine tools, conveyor assemblies, linkage mechanisms, and general industrial equipment where a hardened, precision-diameter shank is required to guide motion or retain a bearing, bushing, or spacer. The 4140 alloy steel construction provides high tensile strength and wear resistance appropriate for demanding load and cycle conditions. Sold individually per package with a minimum order quantity of 5 units.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1\/2-inch shoulder diameter with a 2-inch shoulder length for precise fit in bored locating holes\u003c\/li\u003e\n  \u003cli\u003e3\/8-16 UNC thread for secure engagement into tapped mating components\u003c\/li\u003e\n  \u003cli\u003e4140 alloy steel construction for high strength and wear resistance\u003c\/li\u003e\n  \u003cli\u003e1\/4-inch hex socket drive for installation with standard Allen keys or hex bit drivers\u003c\/li\u003e\n  \u003cli\u003e3\/4-inch head diameter and 5\/16-inch head height for positive seating against the work surface\u003c\/li\u003e\n  \u003cli\u003eMeets ASME\/ANSI B18.3, ASTM F835, and IFI 124 standards\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or standard-specification shoulder screw for industrial machinery, fixtures, and mechanical assemblies requiring a 1\/2-inch shoulder diameter, 2-inch shoulder length, and 3\/8-16 UNC thread.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by qualified machinists or maintenance technicians. De-energize and lock out all equipment before servicing any assembly containing this fastener. Use a calibrated 1\/4-inch hex key or bit driver to torque the screw into the tapped receiver; ensure the shoulder seats fully into the precision bore before final tightening. Do not substitute thread lubricants or sealants unless specified by the equipment manufacturer.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProduct Type\u003c\/strong\u003e: Shoulder Screw\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShoulder Diameter\u003c\/strong\u003e: 1\/2 inch (0.5000 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShoulder Length\u003c\/strong\u003e: 2 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\u003eDrive Type\u003c\/strong\u003e: Hex Socket\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrive Size\u003c\/strong\u003e: 1\/4 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Diameter\u003c\/strong\u003e: 3\/4 inch (0.7500 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Height\u003c\/strong\u003e: 5\/16 inch (0.3125 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: 4140 Alloy Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: ASME\/ANSI B18.3, ASTM F835, IFI 124\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMinimum Order Quantity\u003c\/strong\u003e: 5\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: 225121PR\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51692594069810,"sku":"225121PR","price":5023.83,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f6af15ba6cc7d665ea05a47cb570a543_9a69af72-adc7-4e83-8cac-d3200372141b.jpg?v=1788299659","url":"https:\/\/voomisupply.com\/products\/value-collection-225121pr-shoulder-screw-1-2-in-4140-steel","provider":"Voomi Supply","version":"1.0","type":"link"}