{"product_id":"value-collection-221157pr-shoulder-screw-1-2-in-alloy-steel","title":"Value Collection 221157PR Shoulder Screw 1\/2 in Alloy Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION 221157PR is a hex socket shoulder screw machined from Grade 8 alloy steel with an uncoated finish. The shoulder measures 0.5 inches in diameter and 5 inches in length, providing a precise bearing surface for rotating or sliding components. The 3\/8-16 UNC threaded section secures the fastener into a tapped hole, while the 3\/4-inch head diameter and 5\/16-inch head height accept a 1\/4-inch hex key drive for installation. This shoulder screw meets ANSI B18.3, ASME\/ANSI B18.3, and ASTM A574 standards, making it suitable for applications where dimensional accuracy and material strength are critical.\u003c\/p\u003e\n\u003cp\u003eShoulder screws of this type are used in mechanical assemblies where a precision-ground cylindrical surface is needed to guide motion, act as a pivot point, or retain a bearing or bushing. Common applications include jigs and fixtures, die sets, linkage assemblies, and industrial machinery. The 5-inch shoulder length suits deeper assemblies or setups requiring extended travel. Technicians and machinists working in manufacturing, tooling, and mechanical maintenance environments are the primary installers of this fastener type.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e0.5-inch shoulder diameter with 5-inch shoulder length for extended precision bearing surfaces\u003c\/li\u003e\n  \u003cli\u003eGrade 8 alloy steel construction for high tensile strength and durability\u003c\/li\u003e\n  \u003cli\u003e3\/8-16 UNC thread standard for secure engagement in standard tapped holes\u003c\/li\u003e\n  \u003cli\u003e1\/4-inch hex socket drive for torque application with standard hex keys or drivers\u003c\/li\u003e\n  \u003cli\u003eUncoated finish suitable for use with added lubrication or surface treatments\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 a standard shoulder screw for use in mechanical assemblies requiring a 0.5-inch diameter shoulder, 3\/8-16 UNC threaded engagement, and a 1\/4-inch hex socket drive in conformance with ANSI B18.3 specifications.\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 driver. Ensure the mating tapped hole is clean and correctly sized for the 3\/8-16 UNC thread before driving the fastener. Do not overtighten, as the shoulder surface must remain free to function as a bearing or pivot interface. Consult applicable machinery safety and lockout\/tagout procedures before servicing any assembly containing this fastener.\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: 5 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\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: 0.14 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: 221157PR\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51706974437682,"sku":"221157PR","price":4374.06,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/dd13464323c603ce2a760e45f5f6a445.jpg?v=1788437726","url":"https:\/\/voomisupply.com\/products\/value-collection-221157pr-shoulder-screw-1-2-in-alloy-steel","provider":"Voomi Supply","version":"1.0","type":"link"}