{"product_id":"value-collection-221079pr-shoulder-screw-3-8-in-grade-8","title":"Value Collection 221079PR Shoulder Screw 3\/8 in Grade 8","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VALUE COLLECTION 221079PR is a Grade 8 alloy steel shoulder screw designed for precision fastening applications requiring a tight-tolerance cylindrical shoulder. The shoulder measures 3\/8 inches in diameter and 2-1\/2 inches in overall length, with a 5\/16-18 UNC threaded end. Drive engagement is through a 3\/16-inch hex socket recess. The head is hex-style with a height of 0.250 inches and a diameter between 0.543 and 0.562 inches. This screw is supplied uncoated and conforms to ANSI B18.3, ASME\/ANSI B18.3, and ASTM A574 standards. Machinists, maintenance technicians, and assembly professionals install these in applications that require a pivot point, spacer, or guide for mating components.\u003c\/p\u003e\u003cp\u003eShoulder screws of this type are used across industrial machinery, jigs and fixtures, linkage assemblies, and mechanical pivot joints. The precision shoulder acts as a bearing surface or pivot pin while the threaded shank locks into a tapped hole. This part is sold individually but carries a minimum order quantity of 5 units, making it suitable for both repair stock and production builds. It is appropriate for both light industrial and heavy-duty mechanical assemblies where Grade 8 tensile strength is required.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e3\/8-inch shoulder diameter provides a precision bearing or pivot surface\u003c\/li\u003e\n\u003cli\u003e2-1\/2-inch overall length accommodates deeper assemblies and linkage stacks\u003c\/li\u003e\n\u003cli\u003e5\/16-18 UNC thread for secure engagement in standard tapped holes\u003c\/li\u003e\n\u003cli\u003eGrade 8 alloy steel construction for high tensile strength in demanding applications\u003c\/li\u003e\n\u003cli\u003e3\/16-inch hex socket drive for torquing in confined spaces\u003c\/li\u003e\n\u003cli\u003eMeets ANSI B18.3, ASME\/ANSI B18.3, and ASTM A574 standards\u003c\/li\u003e\n\u003cli\u003eUncoated finish suitable for use as-is or with added corrosion protection\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style or replacement shoulder screw for industrial machinery, fixture builds, and mechanical assemblies requiring a 3\/8-inch shoulder diameter with 5\/16-18 UNC threading.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by machinists or maintenance technicians using a 3\/16-inch hex key or Allen wrench. Ensure the mating tapped hole is clean and within tolerance before driving the screw. Do not over-torque into soft or thin materials; follow applicable mechanical assembly standards for Grade 8 fasteners. Minimum order quantity of 5 units applies when sourcing this part.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eShoulder Diameter\u003c\/strong\u003e: 3\/8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2-1\/2 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 5\/16-18 UNC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Type\u003c\/strong\u003e: Hex\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Height\u003c\/strong\u003e: 0.250 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Diameter\u003c\/strong\u003e: 0.543 to 0.562 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: 3\/16 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: 0.1 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: 221079PR\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51722153722162,"sku":"221079PR","price":1426.37,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/aab13654695776bafb9ba8e4f5d6cd1c.jpg?v=1788586463","url":"https:\/\/voomisupply.com\/products\/value-collection-221079pr-shoulder-screw-3-8-in-grade-8","provider":"Voomi Supply","version":"1.0","type":"link"}