{"product_id":"holo-krome-08040-shoulder-screw-3-8-in-alloy-steel-hex-socket","title":"Holo-krome 08040 Shoulder Screw 3\/8 in Alloy Steel Hex Socket","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HOLO-KROME 08040 is a Grade 8 alloy steel shoulder screw designed for precision mechanical assemblies where a hardened, close-tolerance shoulder is required as a bearing, pivot, or guide surface. The screw features a 3\/8-inch shoulder diameter and a 3\/4-inch shoulder length, with a 5\/16-18 UNRC threaded end measuring 1\/2 inch in length. Drive is a 3\/16-inch hex socket. Overall length is 1.5 inches. The uncoated finish makes it suitable for applications where post-treatment or close dimensional fit is critical. Mechanical assemblers, maintenance technicians, and industrial equipment builders are the typical installers.\u003c\/p\u003e\n\u003cp\u003eThis shoulder screw is used in jigs, fixtures, dies, and general precision mechanical assemblies where a hardened shoulder acts as a pivot point, linear guide, or bearing journal. It is appropriate for both light industrial and heavy-duty machine tool applications. The Grade 8 alloy steel construction and compliance with ASME B18.3 and ASME B1.1 standards make it a reliable choice for demanding mechanical environments where dimensional consistency is essential.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e3\/8-inch shoulder diameter with close-tolerance head diameter range of 0.543 to 0.562 inches\u003c\/li\u003e\n  \u003cli\u003eGrade 8 alloy steel construction for high tensile strength and wear resistance\u003c\/li\u003e\n  \u003cli\u003e3\/16-inch hex socket drive for precise torque application in confined spaces\u003c\/li\u003e\n  \u003cli\u003e5\/16-18 UNRC thread form compliant with ASME B1.1\u003c\/li\u003e\n  \u003cli\u003eUncoated finish maintains tight dimensional tolerances for press-fit or slip-fit shoulder applications\u003c\/li\u003e\n  \u003cli\u003eMeets ASME B18.3 standards for socket head cap and shoulder screws\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard ASME B18.3 shoulder screw for use in precision mechanical assemblies, jigs, fixtures, and die sets requiring a 3\/8-inch diameter shoulder with a 5\/16-18 threaded shank.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a qualified mechanical assembler or machinist using an appropriately sized 3\/16-inch hex key or socket driver. Ensure the mating bore is sized to the correct tolerance class for the intended shoulder fit before installation. Do not over-torque the threaded end, as this can damage the thread or distort the shoulder fitment. Verify compliance with applicable machinery or equipment standards before use in safety-critical assemblies.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShoulder Diameter\u003c\/strong\u003e: 0.3750 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShoulder Length\u003c\/strong\u003e: 3\/4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 1.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 5\/16-18 UNRC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.5000 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\u003eHead Height\u003c\/strong\u003e: 0.2500 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\u003eHead Type\u003c\/strong\u003e: Rounded\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: ASME B1.1, ASME B18.3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 31161619\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: HOLO-KROME\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 08040\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HOLO-KROME","offers":[{"title":"Default Title","offer_id":51752940306738,"sku":"08040","price":15954.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/d57e106e8b234f51b7c22d4d57959ecf.jpg?v=1788931332","url":"https:\/\/voomisupply.com\/products\/holo-krome-08040-shoulder-screw-3-8-in-alloy-steel-hex-socket","provider":"Voomi Supply","version":"1.0","type":"link"}