{"product_id":"value-collection-40878-2-button-socket-cap-screw-50-pack","title":"Value Collection -40878-2 Button Socket Cap Screw 50 Pack","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION -40878-2 is a button socket cap screw designed for applications requiring a low-profile fastening solution with high strength and corrosion resistance. Manufactured from alloy steel with a black oxide coating, this screw features a 5\/16-18 UNC thread and measures 1\/2 inch in length under the head. The button head profile reduces surface protrusion, making it suitable for assemblies where clearance is limited. Hardness is rated at 36-43 HRC, meeting the mechanical requirements of ANSI\/ASME B18.3 and ASTM F835. This package contains 50 pieces. Installed by millwrights, maintenance technicians, and assembly professionals across industrial and commercial applications.\u003c\/p\u003e\n\u003cp\u003eThis screw is suited for use in general mechanical assemblies, machinery guards, enclosures, brackets, and fabricated steel components where a flush or near-flush fastener profile is required. The black oxide finish provides mild corrosion resistance and reduces light reflection, making it a common choice in both industrial maintenance and precision fabrication settings. The 3\/16-inch hex socket drive accommodates standard hex keys and socket drivers.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eButton head profile keeps fastener low-profile for clearance-sensitive assemblies\u003c\/li\u003e\n  \u003cli\u003eAlloy steel construction with 36-43 HRC hardness rating per ASTM F835\u003c\/li\u003e\n  \u003cli\u003eBlack oxide coating for mild corrosion resistance and reduced reflectivity\u003c\/li\u003e\n  \u003cli\u003e3\/16-inch hex socket drive for use with standard hex keys or socket tools\u003c\/li\u003e\n  \u003cli\u003e5\/16-18 UNC fully threaded, Class 3A thread fit for precise engagement\u003c\/li\u003e\n  \u003cli\u003eMeets ANSI\/ASME B18.3 and ASTM F835 fastener standards\u003c\/li\u003e\n  \u003cli\u003eSold in a 50-piece package with a minimum order quantity of 1\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 general industrial and mechanical assemblies requiring a 5\/16-18 UNC button socket cap screw in alloy steel with black oxide finish.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed using a 3\/16-inch hex key or socket driver. De-energize or lock out any equipment before accessing fastener locations in live machinery per applicable OSHA lockout\/tagout procedures. Do not exceed the rated torque specifications published in ANSI\/ASME B18.3 guidelines for this thread size and material class. Inspect threads for damage before installation to ensure proper Class 3A engagement.\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 Under Head\u003c\/strong\u003e: 0.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Type\u003c\/strong\u003e: Button\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 Height\u003c\/strong\u003e: 0.166 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\u003eThread Standard\u003c\/strong\u003e: UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Fit Class\u003c\/strong\u003e: 3A\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHardness\u003c\/strong\u003e: 36-43 HRC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFastener Standard\u003c\/strong\u003e: ANSI\/ASME B18.3 and ASTM F835\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 50 pieces\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.01 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: VALUE COLLECTION\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: -40878-2\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51699279986994,"sku":"-40878-2","price":35.87,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/94172a9bdb9422ddb7048ab9ba89642d.jpg?v=1788374523","url":"https:\/\/voomisupply.com\/products\/value-collection-40878-2-button-socket-cap-screw-50-pack","provider":"Voomi Supply","version":"1.0","type":"link"}