{"product_id":"holo-krome-73145-hex-socket-cap-screw-1-2-20-unf","title":"Holo-krome 73145 Hex Socket Cap Screw 1\/2-20 Unf","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HOLO-KROME 73145 is a partially threaded hex socket cap screw intended for high-strength fastening applications in mechanical assemblies, industrial equipment, and precision fabrication work. It features a 1\/2-20 UNF thread size and measures 3.5 inches in length under the head. The drive is a 3\/8-inch internal hex socket, requiring a standard hex key or Allen driver. Constructed from alloy steel with a black oxide coating, this fastener delivers solid corrosion resistance and surface hardness suited for demanding service environments. Machinists, millwrights, and maintenance technicians typically install this type of fastener.\u003c\/p\u003e\n\u003cp\u003eThis screw is suited for use in mechanical assemblies where fine-thread engagement and high tensile strength are required. The 1\/2-20 UNF thread pitch provides finer thread engagement compared to coarse-thread equivalents, making it appropriate for applications where vibration resistance or precise clamping load is critical. It is partially threaded, which concentrates clamping force at the bearing surfaces of the joint. Typical applications include machine frames, tool fixtures, motor mounts, and industrial equipment assembly where reliable metal-to-metal fastening is needed.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1\/2-20 UNF fine-thread profile for enhanced vibration resistance and precise torque control\u003c\/li\u003e\n  \u003cli\u003e3.5-inch length under head accommodates thicker joint stacks\u003c\/li\u003e\n  \u003cli\u003ePartial threading concentrates clamping force between joined surfaces\u003c\/li\u003e\n  \u003cli\u003eAlloy steel construction provides high tensile and shear strength\u003c\/li\u003e\n  \u003cli\u003eBlack oxide finish adds corrosion resistance and reduces light reflection in precision environments\u003c\/li\u003e\n  \u003cli\u003eConforms to ASME B18.3 and ASTM A574 fastener standards\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\/2-20 UNF partially threaded fastener with a 3\/8-inch internal hex drive.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a qualified machinist, millwright, or maintenance technician using a properly sized 3\/8-inch hex key or socket driver. De-energize and lock out all equipment before fastener replacement or torquing operations. Thread engagement should be confirmed before applying final clamping load to avoid cross-threading the fine UNF thread. Follow applicable equipment manufacturer specifications for torque values and joint design 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\/2-20 UNF\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\/8 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Alloy Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish Coating\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\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: 73145\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HOLO-KROME","offers":[{"title":"Default Title","offer_id":51740186378546,"sku":"73145","price":11502.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/81550ccf6fae062b54331659476e8146.jpg?v=1788823307","url":"https:\/\/voomisupply.com\/products\/holo-krome-73145-hex-socket-cap-screw-1-2-20-unf","provider":"Voomi Supply","version":"1.0","type":"link"}