{"product_id":"holo-krome-72354-hex-socket-cap-screw-7-8-9-unc-alloy-steel","title":"Holo-krome 72354 Hex Socket Cap Screw 7\/8-9 Unc Alloy Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HOLO-KROME 72354 is a hex socket cap screw designed for high-strength bolted connections in industrial, mechanical, and structural applications. It features a 7\/8-9 UNC thread with a 4-1\/2 inch length under head and is partially threaded for secure clamping in through-hole and tapped-hole assemblies. The 3\/4 inch hex drive socket accommodates a standard hex key or Allen-style driver. Constructed from alloy steel with a black oxide finish, this fastener delivers high tensile strength combined with moderate corrosion resistance. It conforms to ASME B18.3 and ASTM A574 standards, making it suitable for precision and load-bearing fastening work.\u003c\/p\u003e\n\u003cp\u003eThis screw is used in heavy-duty machinery, industrial equipment, tooling fixtures, and structural assemblies where a recessed drive and high clamping load are required. The partial threading ensures that the smooth shank aligns and bears load across the joint interface, which is critical in close-tolerance bores. It is suited for machine shops, fabrication facilities, and maintenance environments where ASME-compliant fasteners are specified.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e7\/8-9 UNC thread for high load capacity in coarse-thread tapped holes\u003c\/li\u003e\n  \u003cli\u003e4-1\/2 inch length under head with partial threading for accurate shank-to-bore fit\u003c\/li\u003e\n  \u003cli\u003e3\/4 inch hex socket drive for high-torque installation with a hex key or power tool bit\u003c\/li\u003e\n  \u003cli\u003eAlloy steel construction meets ASTM A574 mechanical requirements\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 standard\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style and general-replacement hex socket cap screw for use in any tapped or through-hole application specifying a 7\/8-9 UNC partially threaded socket head cap screw conforming to ASME B18.3 and ASTM A574.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a qualified mechanic or industrial technician using a properly sized 3\/4 inch hex key or socket drive tool. Always de-energize and lock out any equipment before servicing fastened assemblies. Thread engagement should meet the minimum requirements for the base material as specified by the design engineer or applicable standard. Avoid over-torquing, which can exceed the yield strength of the mating tapped component.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 7\/8-9 UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Under Head\u003c\/strong\u003e: 4-1\/2 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: 3\/4 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\u003eUNSPSC Code\u003c\/strong\u003e: 31161501\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\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: 72354\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HOLO-KROME","offers":[{"title":"Default Title","offer_id":51741265625394,"sku":"72354","price":31.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/b9ca729da637e85a6661814404db82a7.jpg?v=1788830408","url":"https:\/\/voomisupply.com\/products\/holo-krome-72354-hex-socket-cap-screw-7-8-9-unc-alloy-steel","provider":"Voomi Supply","version":"1.0","type":"link"}