{"product_id":"holo-krome-72174-hex-socket-cap-screw-3-8-16-unc-alloy-steel","title":"Holo-krome 72174 Hex Socket Cap Screw 3\/8-16 Unc Alloy Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HOLO-KROME 72174 is a hex socket cap screw designed for high-strength fastening in mechanical assemblies, tooling fixtures, and industrial equipment. It features a 3\/8-16 UNC thread and a 5\/16 inch hex drive, requiring a standard hex key or Allen wrench for installation and removal. Constructed from alloy steel with a black oxide finish, the fastener resists mild corrosion and surface oxidation while maintaining high tensile strength. The 3 inch length under head with partial threading allows the unthreaded shank to bear shear loads in close-tolerance applications. This screw meets ASME B18.3 and ASTM A574 standards, making it suitable for demanding mechanical and structural fastening work.\u003c\/p\u003e\u003cp\u003eThe 72174 is suited for use in machine tool setups, jigs, fixtures, hydraulic components, and general industrial assemblies where socket-drive access is limited or a flush, low-profile head is required. The 3\/8-16 UNC coarse thread pattern offers good thread engagement and easy assembly in steel and aluminum tapped holes. Partial threading is particularly useful in applications that require a precision grip length or controlled clamping force between assembled components.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e3\/8-16 UNC coarse thread for reliable engagement in tapped steel and aluminum\u003c\/li\u003e\n\u003cli\u003e3 inch length under head with partial threading for controlled grip length\u003c\/li\u003e\n\u003cli\u003e5\/16 inch hex socket drive compatible with standard Allen keys and socket drivers\u003c\/li\u003e\n\u003cli\u003eAlloy steel construction rated to ASTM A574 for high tensile strength\u003c\/li\u003e\n\u003cli\u003eBlack oxide finish provides mild corrosion resistance and reduces light reflection\u003c\/li\u003e\n\u003cli\u003eConforms to ASME B18.3 dimensional standards\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or direct-fit fastener for any application requiring a 3\/8-16 UNC hex socket cap screw with a 3 inch length under head per ASME B18.3.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is typically performed by machinists or maintenance mechanics using a 5\/16 inch hex key or Allen socket driver. De-energize and lock out all equipment before replacing fasteners in assemblies under load or pressure. Apply appropriate thread lubricant or thread-locking compound per the equipment manufacturer's torque and preload requirements. Consult ASME or equipment OEM documentation for torque specifications applicable to this thread size and material class.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 3\/8-16 UNC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Under Head\u003c\/strong\u003e: 3 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: 5\/16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThreading\u003c\/strong\u003e: Partially Threaded\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Alloy Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Black Oxide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFastener Standard\u003c\/strong\u003e: ASME B18.3, ASTM A574\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.1 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\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: 72174\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HOLO-KROME","offers":[{"title":"Default Title","offer_id":51749330747698,"sku":"72174","price":9740.45,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/fb2533147dd2011bea4cda049ec7ab8c.jpg?v=1788904606","url":"https:\/\/voomisupply.com\/products\/holo-krome-72174-hex-socket-cap-screw-3-8-16-unc-alloy-steel","provider":"Voomi Supply","version":"1.0","type":"link"}