{"product_id":"holo-krome-72380-hex-socket-cap-screw-1-8-unc-alloy-steel","title":"Holo-krome 72380 Hex Socket Cap Screw 1-8 Unc Alloy Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HOLO-KROME 72380 is a hex socket cap screw designed for high-strength fastening applications where a compact drive profile is required. Threaded to 1-8 UNC with a 3.5-inch length under head, this screw is partially threaded and accepts a 3\/4-inch hex key drive. It is manufactured from alloy steel with a black oxide finish, providing corrosion resistance and a low-reflectance surface. Conforming to ASME B18.3 and ASTM A574 standards, this screw is built for demanding industrial, mechanical, and structural assembly work. Maintenance technicians, millwrights, and machine builders regularly specify this fastener type for equipment assembly and repair.\u003c\/p\u003e\u003cp\u003eThis screw is suited for applications requiring a recessed drive to avoid interference with surrounding components. The 1-8 UNC coarse thread pitch is well-suited for use in steel and cast iron, offering good resistance to cross-threading and allowing faster assembly. Typical install scenarios include machine frames, tooling fixtures, heavy equipment, and industrial assemblies where torque requirements are high and fastener accessibility is limited. The partial threading engages the grip length securely across joined material while the unthreaded shank resists shear loads.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e1-8 UNC coarse thread for secure engagement in steel and cast iron\u003c\/li\u003e\n\u003cli\u003e3.5-inch length under head accommodates thicker material stacks\u003c\/li\u003e\n\u003cli\u003ePartially threaded shank improves shear load performance\u003c\/li\u003e\n\u003cli\u003e3\/4-inch hex socket drive accepts standard hex keys and socket drivers\u003c\/li\u003e\n\u003cli\u003eAlloy steel construction with black oxide coating for corrosion resistance\u003c\/li\u003e\n\u003cli\u003eMeets ASME B18.3 and ASTM A574 standards for dimensional and mechanical compliance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style and general-use replacement hex socket cap screw for industrial and mechanical assemblies requiring a 1-8 UNC coarse thread fastener conforming to ASME B18.3 and ASTM A574.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified mechanic, millwright, or maintenance technician familiar with fastener torque practices for ASTM A574 alloy steel cap screws. Use a properly sized 3\/4-inch hex key or socket driver to avoid rounding the drive recess. Ensure mating threads are clean and free of debris before installation. De-energize or lock out equipment per applicable safety procedures before servicing any assembly that includes this fastener.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1-8 UNC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Under Head\u003c\/strong\u003e: 3.5 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 inches\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\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: 72380\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HOLO-KROME","offers":[{"title":"Default Title","offer_id":51739378549042,"sku":"72380","price":28.11,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/3d87090f3ceaa237090ecb1cb126882c.jpg?v=1788813792","url":"https:\/\/voomisupply.com\/products\/holo-krome-72380-hex-socket-cap-screw-1-8-unc-alloy-steel","provider":"Voomi Supply","version":"1.0","type":"link"}