{"product_id":"holo-krome-73164-hex-socket-cap-screw-5-8-18-unf-alloy-steel","title":"Holo-krome 73164 Hex Socket Cap Screw 5\/8-18 Unf Alloy Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HOLO-KROME 73164 is a hex socket cap screw designed for high-strength fastening applications in mechanical assemblies, industrial equipment, and trade installations. Sized at 5\/8-18 UNF with a 3.5-inch length under head, this screw is partially threaded and driven with a 0.5-inch hex key. The alloy steel construction with black oxide coating delivers solid corrosion resistance and structural integrity under load. It meets ASME B18.3 and ASTM A574 standards, making it suitable for demanding fastener specifications in maintenance, fabrication, and equipment repair work.\u003c\/p\u003e\n\u003cp\u003eThis cap screw fits applications requiring a fine-thread UNF fastener with a socket drive interface. It is commonly used in machine frames, motor mounts, equipment enclosures, and structural assemblies where a flush or recessed fastener head is required. The 5\/8-18 UNF thread pitch is appropriate for applications where fine thread engagement and controlled torque are priorities. Machinists, millwrights, HVAC equipment technicians, and industrial maintenance professionals regularly specify this type of fastener for precision mechanical work.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e5\/8-18 UNF fine thread for precise engagement and controlled clamping force\u003c\/li\u003e\n  \u003cli\u003e3.5-inch length under head with partial threading for through-hole and clearance applications\u003c\/li\u003e\n  \u003cli\u003e0.5-inch hex socket drive for torque wrench and hex key installation\u003c\/li\u003e\n  \u003cli\u003eAlloy steel construction meets ASTM A574 high-strength cap screw standard\u003c\/li\u003e\n  \u003cli\u003eBlack oxide finish provides moderate corrosion resistance and reduces light reflection\u003c\/li\u003e\n  \u003cli\u003eConforms to ASME B18.3 socket cap screw dimensional standard\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 5\/8-18 UNF partially threaded socket head fastener.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a qualified mechanic or maintenance technician using a calibrated torque wrench and the appropriate 0.5-inch hex key or socket bit. Ensure mating threads are clean and free of debris before installation. Do not exceed the rated torque range for the fastener grade per ASTM A574 specifications. Always de-energize and lockout any equipment before replacing or installing fasteners in live mechanical assemblies.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 5\/8-18 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: 0.5 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\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: 73164\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HOLO-KROME","offers":[{"title":"Default Title","offer_id":51740716892466,"sku":"73164","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/d594cca4f4268b64b73d697d509fd0cb.jpg?v=1788826911","url":"https:\/\/voomisupply.com\/products\/holo-krome-73164-hex-socket-cap-screw-5-8-18-unf-alloy-steel","provider":"Voomi Supply","version":"1.0","type":"link"}