{"product_id":"value-collection-40881-button-socket-cap-screw-5-16-18","title":"Value Collection 40881 Button Socket Cap Screw 5\/16-18","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION 40881 is a 5\/16-18 button socket cap screw designed for use in fastening applications that require a low-profile head and high clamp load. The screw features a hex socket drive sized at 3\/16 inch and a fully threaded shank measuring 1 inch under the head. Constructed from alloy steel with a black oxide finish, the fastener meets ANSI\/ASME B18.3 and ASTM F835 dimensional and mechanical standards. Hardness is rated at 36-43 HRC, and the thread fit class is 3A with right-hand, UNC thread direction. This part is typically installed by maintenance technicians, machinists, and mechanical assembly professionals.\u003c\/p\u003e\n\u003cp\u003eThis button socket cap screw is suited for light to medium clamping applications where a rounded, low-profile head is preferred over a standard hex cap or flat-head profile. The black oxide finish provides mild corrosion resistance and reduces light reflection in exposed assemblies. Common installation environments include machine frames, fixtures, panels, and equipment enclosures where internal hex drive access is available. The UNC thread standard makes it compatible with standard inch-system tapped holes commonly found in North American manufacturing and industrial maintenance contexts.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eButton head profile with 3\/16 inch hex socket drive for low-clearance installations\u003c\/li\u003e\n  \u003cli\u003eFully threaded shank, 1 inch length under head, 5\/16-18 UNC thread\u003c\/li\u003e\n  \u003cli\u003eAlloy steel construction with 36-43 HRC hardness per ASTM F835\u003c\/li\u003e\n  \u003cli\u003eBlack oxide finish for mild corrosion resistance and reduced surface glare\u003c\/li\u003e\n  \u003cli\u003eThread fit class 3A, right-hand thread direction\u003c\/li\u003e\n  \u003cli\u003eMeets ANSI\/ASME B18.3 dimensional standards\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in standard inch-system tapped holes with 5\/16-18 UNC thread form. Suitable as a direct replacement or general-use fastener in any application requiring an ANSI\/ASME B18.3 button socket cap screw of this size and thread.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstall using a 3\/16 inch hex key or socket driver. Verify that the mating tapped hole is clean and free of debris before threading the fastener. Minimum order quantity is 50 pieces per order. Always torque fasteners to application-appropriate values per engineering specifications or applicable mechanical codes — do not exceed material or joint limits.\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\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Fit Class\u003c\/strong\u003e: 3A\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Under Head\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Type\u003c\/strong\u003e: Button\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Height\u003c\/strong\u003e: 0.166 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: 3\/16 inch\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: 36-43 HRC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFastener Standard\u003c\/strong\u003e: ANSI\/ASME B18.3, ASTM F835\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1 (minimum order quantity: 50)\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: 40881\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51690722656562,"sku":"40881","price":43.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/77d0b79469b32b730a6a2ac304ee9e1b.jpg?v=1788274468","url":"https:\/\/voomisupply.com\/products\/value-collection-40881-button-socket-cap-screw-5-16-18","provider":"Voomi Supply","version":"1.0","type":"link"}