{"product_id":"holo-krome-73142-hex-socket-cap-screw-1-2-20-unf-alloy-steel","title":"Holo-krome 73142 Hex Socket Cap Screw 1\/2-20 Unf Alloy Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HOLO-KROME 73142 is a partially threaded hex socket cap screw designed for high-strength mechanical fastening in demanding trade and industrial applications. It features a 1\/2-20 UNF thread size, a 2.5-inch length under head, and a 3\/8-inch hex drive. Manufactured from alloy steel with a black oxide finish, this screw meets ASME B18.3 and ASTM A574 standards, making it suitable for applications requiring controlled torque and reliable clamping force. It is installed using a 3\/8-inch hex key or socket driver.\u003c\/p\u003e\u003cp\u003eThis cap screw is used in mechanical assemblies, machinery maintenance, and structural fastening where a flush or low-profile socket head is required. The 1\/2-20 UNF fine thread pitch provides tighter thread engagement and is well-suited for applications requiring precise clamping or where vibration resistance is a factor. Typical installers include millwrights, maintenance mechanics, and industrial technicians working on equipment assemblies, jigs, fixtures, and fabricated metal structures.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e1\/2-20 UNF fine thread for precise clamping and vibration resistance\u003c\/li\u003e\n\u003cli\u003e2.5-inch length under head with partial threading for strong grip in clearance-hole applications\u003c\/li\u003e\n\u003cli\u003e3\/8-inch hex socket drive for use with standard hex keys or socket drivers\u003c\/li\u003e\n\u003cli\u003eAlloy steel construction meets ASTM A574 high-strength fastener requirements\u003c\/li\u003e\n\u003cli\u003eBlack oxide finish provides mild corrosion resistance and reduces light glare on finished assemblies\u003c\/li\u003e\n\u003cli\u003eConforms to ASME B18.3 dimensional standards for socket cap screws\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or standard-service hex socket cap screw for mechanical assemblies requiring a 1\/2-20 UNF partially threaded cap screw per ASME B18.3.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by qualified mechanics or technicians familiar with fastener torque requirements for alloy steel cap screws. De-energize and lock out all equipment before removing or replacing fasteners in active machinery. Use a properly sized 3\/8-inch hex key or socket to avoid rounding the drive socket. Do not substitute a lower-grade fastener in applications specified for ASTM A574 high-strength hardware.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/2-20 UNF\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Under Head\u003c\/strong\u003e: 2.5 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\/8 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\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: 73142\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HOLO-KROME","offers":[{"title":"Default Title","offer_id":51740087451954,"sku":"73142","price":7935.46,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/8db820d1adfd08e0d7d17d1998aad83e.jpg?v=1788822192","url":"https:\/\/voomisupply.com\/products\/holo-krome-73142-hex-socket-cap-screw-1-2-20-unf-alloy-steel","provider":"Voomi Supply","version":"1.0","type":"link"}