{"product_id":"holo-krome-72438-hex-socket-cap-screw-1-1-2-6-unc","title":"Holo-krome 72438 Hex Socket Cap Screw 1-1\/2-6 Unc","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HOLO-KROME 72438 is a heavy-duty hex socket cap screw designed for high-strength fastening applications in industrial and mechanical assemblies. It features a 1-1\/2-6 UNC thread with a 6-inch length under head and is partially threaded for proper engagement in thick-section joints. The drive is a 1-inch internal hex socket, requiring a matching hex key or Allen driver. Manufactured from alloy steel with a black oxide finish, this fastener offers good corrosion resistance in low-moisture environments and meets ASME B18.3 and ASTM A574 standards. It weighs approximately 4.323 pounds per piece.\u003c\/p\u003e\n\u003cp\u003eThis screw is used in heavy structural, tooling, machine frame, and equipment assembly applications where a high-tensile socket-head fastener is required. The large 1-1\/2-inch diameter and coarse 6 UNC thread pitch make it suitable for thick-plate clamping and fixture work where maximum clamp load is critical. It is commonly installed by millwrights, industrial maintenance technicians, and mechanical assemblers working on presses, dies, machine bases, and similar heavy equipment.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1-1\/2-6 UNC coarse thread provides high clamp load in thick-section assemblies\u003c\/li\u003e\n  \u003cli\u003e6-inch length under head with partial threading for through-bolt and blind-hole applications\u003c\/li\u003e\n  \u003cli\u003e1-inch internal hex socket drive for high-torque installation\u003c\/li\u003e\n  \u003cli\u003eAlloy steel construction meets ASTM A574 high-strength socket screw standard\u003c\/li\u003e\n  \u003cli\u003eBlack oxide finish provides moderate corrosion resistance and reduced light reflection\u003c\/li\u003e\n  \u003cli\u003eConforms to ASME B18.3 dimensional standard for socket cap screws\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard ASME B18.3 hex socket cap screw for use in any application requiring a 1-1\/2-6 UNC partially threaded fastener in alloy steel with black oxide finish.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a qualified millwright or mechanical technician using a calibrated torque wrench and a proper 1-inch hex key or drive bit. Ensure mating threads are clean and free of debris before assembly. Always derate published torque values when using black oxide fasteners without additional lubrication, as surface coating affects friction coefficients. Follow applicable industry standards and equipment OEM specifications for final torque requirements.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1-1\/2-6 UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Under Head\u003c\/strong\u003e: 6 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThreading\u003c\/strong\u003e: Partially Threaded\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: 1 inch\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: 4.323 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 31161501\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: 72438\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HOLO-KROME","offers":[{"title":"Default Title","offer_id":51740087681330,"sku":"72438","price":137.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/755552d3853a5c03f3f2f624aa11033f_f05b049b-e846-410d-9861-42787442f18f.jpg?v=1788822196","url":"https:\/\/voomisupply.com\/products\/holo-krome-72438-hex-socket-cap-screw-1-1-2-6-unc","provider":"Voomi Supply","version":"1.0","type":"link"}