{"product_id":"value-collection-221121pr-shoulder-screw-1-2in-x-2in-3-8-16-alloy","title":"Value Collection 221121PR Shoulder Screw 1\/2in X 2in 3\/8-16 Alloy","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VALUE COLLECTION 221121PR is a Grade 8 alloy steel shoulder screw designed for precision fastening applications where a controlled-diameter bearing surface is required. The shoulder measures 0.5 inches in diameter and 2 inches in length, providing an accurate pivot or bearing point for components such as linkages, cams, and fixtures. The 3\/8-16 UNC threaded section anchors the fastener securely into a tapped hole. Drive engagement is through a 1\/4 inch hex socket. The uncoated finish leaves the alloy steel surface bare, which is standard for applications where dimensional accuracy is the priority. Installed by machinists, maintenance technicians, and assembly professionals.\u003c\/p\u003e\u003cp\u003eThis shoulder screw is suited for industrial, mechanical, and manufacturing applications where a hardened, close-tolerance shoulder is needed to serve as a shaft, pivot, or guide pin. Typical install scenarios include jigs, fixtures, tooling, and machine assemblies where components must rotate or slide on the shoulder rather than on a threaded surface. The Grade 8 alloy steel construction supports high-load environments. Sold individually with a minimum order quantity of 5 units.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eShoulder diameter of 0.5 inches provides a precise bearing and pivot surface\u003c\/li\u003e\n\u003cli\u003e2 inch shoulder length accommodates standard fixture and linkage stack-ups\u003c\/li\u003e\n\u003cli\u003e3\/8-16 UNC thread for secure engagement in tapped steel or aluminum\u003c\/li\u003e\n\u003cli\u003eGrade 8 alloy steel construction for high tensile strength and durability\u003c\/li\u003e\n\u003cli\u003e1\/4 inch hex socket drive for Allen key or hex bit installation\u003c\/li\u003e\n\u003cli\u003eMeets ANSI B18.3, ASME\/ANSI B18.3, and ASTM A574 standards\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard shoulder screw per ANSI B18.3 and ASME\/ANSI B18.3, suitable for use in any application requiring a 1\/2 inch diameter, 2 inch long shoulder with a 3\/8-16 UNC threaded end in alloy steel.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation requires a 1\/4 inch hex key or hex socket bit. Ensure the tapped receiving hole meets the 3\/8-16 UNC thread specification and that the counterbored shoulder hole is sized to the appropriate close-tolerance fit for the 0.5 inch shoulder diameter. De-energize or lock out any machinery before installing or replacing shoulder screws in active assemblies. Do not use an impact driver at full torque, as this can damage the hex socket recess on hardened fasteners.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\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: 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\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 inch\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\u003eStandards\u003c\/strong\u003e: ANSI B18.3, ASME\/ANSI B18.3, ASTM A574\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.16 pounds\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\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: 221121PR\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51705612566834,"sku":"221121PR","price":2386.47,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/503eba0abfe0ec11b0452e0423c23189.jpg?v=1788430012","url":"https:\/\/voomisupply.com\/products\/value-collection-221121pr-shoulder-screw-1-2in-x-2in-3-8-16-alloy","provider":"Voomi Supply","version":"1.0","type":"link"}