{"product_id":"value-collection-225055pr-shoulder-screw-3-8-in-4140-alloy-steel","title":"Value Collection 225055PR Shoulder Screw 3\/8 in 4140 Alloy Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VALUE COLLECTION 225055PR is a hex socket shoulder screw machined from 4140 alloy steel, designed for precision mechanical assemblies where a smooth cylindrical bearing surface is required. The shoulder measures 3\/8 inch in diameter and 5\/8 inch in length, providing a close-tolerance pivot or guide surface. The threaded portion is 5\/16-18 UNC. The hex socket drive accepts a 3\/16 inch hex key for installation in tight or recessed spaces. This fastener meets ASME\/ANSI B18.3, ASTM F835, and IFI 124 standards, making it appropriate for industrial, tooling, and machinery applications where dimensional accuracy and material strength are critical.\u003c\/p\u003e\u003cp\u003eShoulder screws of this type are commonly used in die sets, jigs, fixtures, cams, linkages, and pivot assemblies across manufacturing, maintenance, and repair operations. The smooth shoulder acts as a bearing surface or positive stop, eliminating the need for a separate dowel or bushing in many designs. Machinists, toolmakers, and maintenance mechanics typically install this fastener in light to medium-duty mechanical assemblies requiring repeatable positioning.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e3\/8 inch shoulder diameter provides a precise bearing or pivot surface\u003c\/li\u003e\n\u003cli\u003e5\/8 inch shoulder length suits shallow pivot and guide applications\u003c\/li\u003e\n\u003cli\u003e5\/16-18 UNC thread for positive clamping with standard nuts or tapped holes\u003c\/li\u003e\n\u003cli\u003e4140 alloy steel construction for high tensile strength and wear resistance\u003c\/li\u003e\n\u003cli\u003e3\/16 inch hex socket drive allows installation with a standard hex key in confined spaces\u003c\/li\u003e\n\u003cli\u003eMeets ASME\/ANSI B18.3, ASTM F835, and IFI 124 dimensional and material standards\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard shoulder screw for use in tooling, fixtures, dies, and mechanical assemblies requiring a 3\/8 inch diameter shoulder with 5\/16-18 UNC thread engagement.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstall with a 3\/16 inch hex key. Ensure the mating tapped hole or clearance bore is clean and free of debris before installation. Do not over-torque — shoulder screws are designed to clamp with the shoulder as the bearing surface, not to be driven to high preload values. In machinery applications, follow applicable ASME or facility maintenance standards for fastener installation and inspection.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\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: 3\/8 inch (0.3750 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShoulder Length\u003c\/strong\u003e: 5\/8 inch\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\u003eDrive Type\u003c\/strong\u003e: Hex Socket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrive Size\u003c\/strong\u003e: 3\/16 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Diameter\u003c\/strong\u003e: 9\/16 inch (0.5625 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Height\u003c\/strong\u003e: 1\/4 inch (0.2500 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\u003eWeight\u003c\/strong\u003e: 1 pound (package)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 31161619\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: 225055PR\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51690339172658,"sku":"225055PR","price":2992.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/85748ffbbfd5c1d42754cd706e407017.jpg?v=1788269051","url":"https:\/\/voomisupply.com\/products\/value-collection-225055pr-shoulder-screw-3-8-in-4140-alloy-steel","provider":"Voomi Supply","version":"1.0","type":"link"}