{"product_id":"holo-krome-72170-hex-socket-cap-screw-3-8-16-unc-alloy-steel","title":"Holo-krome 72170 Hex Socket Cap Screw 3\/8-16 Unc Alloy Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HOLO-KROME 72170 is a hex socket cap screw designed for high-strength fastening applications in mechanical assemblies, fixtures, and equipment. It features a 3\/8-16 UNC thread with a 2.5-inch length under head and a 5\/16-inch hex drive socket. The screw is partially threaded and manufactured from alloy steel with a black oxide coating, which provides moderate corrosion resistance and reduces light reflection in finished assemblies. This fastener meets ASME B18.3 and ASTM A574 standards, making it suitable for applications where dimensional accuracy and tensile strength are critical. Machinists, millwrights, and maintenance technicians are the typical end users.\u003c\/p\u003e\n\u003cp\u003eThis screw is used in industrial machinery, tooling fixtures, hydraulic components, and structural assemblies where a flush or recessed fastener head is required. The hex socket drive allows installation in confined spaces where a standard hex-head wrench cannot reach. The partial thread design provides a grip length that improves clamping force in thick-material applications. Typical installation environments include manufacturing facilities, field maintenance, and OEM equipment production.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e3\/8-16 UNC thread for standard inch-series fastener compatibility\u003c\/li\u003e\n  \u003cli\u003e2.5-inch length under head with partial threading for improved clamping grip\u003c\/li\u003e\n  \u003cli\u003e5\/16-inch hex socket drive for use with standard Allen keys or hex bit drivers\u003c\/li\u003e\n  \u003cli\u003eAlloy steel construction meeting ASTM A574 high-strength cap screw requirements\u003c\/li\u003e\n  \u003cli\u003eBlack oxide finish for mild corrosion resistance and low-reflectance appearance\u003c\/li\u003e\n  \u003cli\u003eConforms to ASME B18.3 dimensional 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 3\/8-16 UNC partially threaded cap screw with a 2.5-inch length under head.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation requires a 5\/16-inch hex key or Allen-style bit driver. Ensure the mating threaded hole is clean and free of debris before driving the fastener. Do not over-torque; consult published torque tables for ASTM A574 alloy steel cap screws at the applicable thread size. Thread-locking compound may be applied where vibration resistance is required, per the equipment manufacturer's recommendations.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 3\/8-16 UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Under Head\u003c\/strong\u003e: 2.5 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: 5\/16 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThreading\u003c\/strong\u003e: Partially 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: 0.1 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: 72170\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HOLO-KROME","offers":[{"title":"Default Title","offer_id":51747357622578,"sku":"72170","price":7239.51,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/c9d60bde010da402e405e4d36e8cbaad.jpg?v=1788879011","url":"https:\/\/voomisupply.com\/products\/holo-krome-72170-hex-socket-cap-screw-3-8-16-unc-alloy-steel","provider":"Voomi Supply","version":"1.0","type":"link"}