{"product_id":"cap-screws-flat-socket-alloy-thermal-black-oxide-5-16-18-x-2-1-4","title":"5\/16-18 X 2-1\/4\" Flat Head Cap Screws | Alloy Steel Thermal Black Oxide (100 \/ Pkg.)","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cb\u003eCap Screws Flat Socket Alloy Thermal Black Oxide 5\/16-18 x 2 1\/4\u003c\/b\u003e are high-strength socket cap screws designed for demanding assemblies where precision, security, and durability matter. The alloy steel construction paired with a thermal black oxide finish delivers strong clamping power with a low-glare, corrosion-conscious profile suitable for machinery, automotive, and fabrication applications.\u003c\/p\u003e \u003cp\u003eThese screws feature a 5\/16-18 thread and an overall length of 2-1\/4 inches, making them compatible with standard fastener hardware and nuts. The flat socket design ensures a clean, flush drive in tight or recessed spaces, helping you achieve reliable torque and consistent performance in every job.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cb\u003eThread size\u003c\/b\u003e: 5\/16-18\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eLength\u003c\/b\u003e: 2-1\/4 in (overall)\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eFinish\u003c\/b\u003e: Thermal Black Oxide\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eMaterial\u003c\/b\u003e: Alloy steel\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eDrive type\u003c\/b\u003e: Hex socket\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eHead style\u003c\/b\u003e: Cap screw\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cb\u003eApplications\u003c\/b\u003e: Ideal for precision machinery, automotive assemblies, equipment fabrication, and maintenance tasks where a strong, durable fastener with a low-glare finish is required. Our cap screws are designed to withstand regular use in industrial environments while maintaining dependable torque and secure clamping.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Mutual Screw","offers":[{"title":"Default Title","offer_id":50350842904855,"sku":"3136CSFBB","price":65.31,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0836\/1125\/5063\/files\/0606CSF188BYW_97bf01ce-0ccb-43c6-ba1a-12eb33c89787.jpg?v=1746805099","url":"https:\/\/mutualscrew.com\/products\/cap-screws-flat-socket-alloy-thermal-black-oxide-5-16-18-x-2-1-4","provider":"Mutual Screw \u0026 Supply","version":"1.0","type":"link"}