{"product_id":"holo-krome-72020-hex-socket-cap-screw-4-40-unc-alloy-steel","title":"Holo-krome 72020 Hex Socket Cap Screw 4-40 Unc Alloy Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HOLO-KROME 72020 is a hex socket cap screw designed for precision fastening in mechanical assemblies, equipment repairs, and industrial applications. It features a 4-40 UNC thread and a 3\/32-inch hex drive, accepting a standard hex key or Allen wrench. The screw is fully threaded along its 3\/8-inch length under the head. Constructed from alloy steel with a black oxide finish, it delivers reliable clamping force in tight spaces where a conventional hex head fastener will not fit. Licensed trade mechanics, millwrights, and equipment technicians commonly install this type of fastener during maintenance and assembly work.\u003c\/p\u003e\n\u003cp\u003eThis screw is suited for light-duty mechanical assemblies requiring a compact, recessed-drive fastener. The 4-40 UNC thread is a fine-pitch unified coarse thread standard common in small instrument panels, electrical enclosures, motor mounts, and precision equipment frames. The black oxide coating provides mild corrosion resistance and reduces surface glare. It is sold individually but must be ordered in multiples of 100 units per the manufacturer minimum order quantity.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e4-40 UNC thread for use in standard tapped holes in small mechanical and electrical assemblies\u003c\/li\u003e\n  \u003cli\u003e3\/32-inch hex drive accepts a standard hex key for installation in recessed or confined spaces\u003c\/li\u003e\n  \u003cli\u003eFully threaded 3\/8-inch length under head maximizes thread engagement across the full shank\u003c\/li\u003e\n  \u003cli\u003eAlloy steel construction meets ASME B18.3 and ASTM A574 fastener standards\u003c\/li\u003e\n  \u003cli\u003eBlack oxide finish provides mild corrosion resistance and a low-reflectance appearance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or stock fastener for any application requiring a 4-40 UNC fully threaded hex socket cap screw with a 3\/8-inch length under head.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation requires a 3\/32-inch hex key or ball-end driver. De-energize and lock out any equipment before fastener work on electrical or powered assemblies. Apply thread-locking compound if vibration is a concern, following the compound manufacturer instructions. Follow applicable ASME or ASTM fastener standards for torque and inspection requirements.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 4-40 UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Under Head\u003c\/strong\u003e: 3\/8 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\/32 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThreading\u003c\/strong\u003e: Fully 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: 0.001 pounds\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: 72020\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HOLO-KROME","offers":[{"title":"Default Title","offer_id":51743623971122,"sku":"72020","price":5901.56,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/b7e6e4b466ea34301324650fa1fb30be.jpg?v=1788848547","url":"https:\/\/voomisupply.com\/products\/holo-krome-72020-hex-socket-cap-screw-4-40-unc-alloy-steel","provider":"Voomi Supply","version":"1.0","type":"link"}