{"product_id":"holo-krome-60078-flat-socket-cap-screw-5-16-18-x-3-4-in","title":"Holo-krome 60078 Flat Socket Cap Screw 5\/16-18 X 3\/4 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HOLO-KROME 60078 is a flat socket cap screw designed for applications requiring a flush or countersunk fastener profile. It features an 82-degree flat head with a 3\/16-inch hex socket drive, accepting a standard hex key for installation and removal. The screw is manufactured from alloy steel with a black oxide finish, providing moderate corrosion resistance and a low-reflectance appearance. It carries a Thread Fit Class 3A designation and a hardness rating of 39-44 HRC, making it suitable for high-stress mechanical assemblies. Fully threaded along its 3\/4-inch overall length, this 5\/16-18 UNC fastener is installed by machinists, maintenance technicians, and mechanical assemblers across industrial and OEM applications.\u003c\/p\u003e\n\u003cp\u003eThis flat socket cap screw is used in machine frames, jigs, fixtures, tooling plates, and general mechanical assemblies where the fastener head must sit flush with or below the mating surface. The countersunk profile suits applications where protrusion would interfere with moving parts, mating components, or safety guarding. It meets ASME B18.3 and ASTM F835 standards, making it appropriate for commercial and industrial mechanical work. Minimum order quantity is 100 pieces per the manufacturer requirement.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e82-degree flat head with 3\/16-inch hex socket drive for flush countersunk installation\u003c\/li\u003e\n  \u003cli\u003eAlloy steel construction with 39-44 HRC hardness for high-strength fastening\u003c\/li\u003e\n  \u003cli\u003eBlack oxide finish for low reflectance and moderate corrosion resistance\u003c\/li\u003e\n  \u003cli\u003eFully threaded 5\/16-18 UNC, Thread Fit Class 3A for precise thread engagement\u003c\/li\u003e\n  \u003cli\u003eMeets ASME B18.3 and ASTM F835 fastener standards\u003c\/li\u003e\n  \u003cli\u003eOverall length measured as full length per ASME convention\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style and maintenance replacement flat socket cap screw for machinery, fixtures, and assemblies requiring a 5\/16-18 UNC fully threaded countersunk fastener conforming to ASME B18.3 and ASTM F835 standards.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation requires a 3\/16-inch hex key or hex socket bit. Countersink the mating material to 82 degrees prior to installation to achieve a proper flush fit. Torque to values consistent with Grade 8 or equivalent alloy steel fastener specifications for the thread size, referencing applicable engineering or maintenance documentation. Power down and de-energize any associated equipment before fastener service in 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\/16-18 UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 0.75 inches (overall)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Type\u003c\/strong\u003e: 82-degree Flat\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\/16 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Diameter\u003c\/strong\u003e: 0.6560 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Height\u003c\/strong\u003e: 0.1980 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFull or Partial Threading\u003c\/strong\u003e: Fully Threaded\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Fit Class\u003c\/strong\u003e: 3A\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\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\u003eHardness\u003c\/strong\u003e: 39-44 HRC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSystem of Measurement\u003c\/strong\u003e: Inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFastener Standard\u003c\/strong\u003e: ASME B18.3, ASTM F835\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: 60078\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HOLO-KROME","offers":[{"title":"Default Title","offer_id":51744932102450,"sku":"60078","price":9166.73,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/1df876b28ed672dcbd39dad88495cd0d.jpg?v=1788862393","url":"https:\/\/voomisupply.com\/products\/holo-krome-60078-flat-socket-cap-screw-5-16-18-x-3-4-in","provider":"Voomi Supply","version":"1.0","type":"link"}