Heavy Duty Black Oxide Socket Cap Screw With Internal Hex Drive, 4 Inch Length, Partially Threaded, 5/16-18 UNC Threads, Meets ASME B18.3 And ASTM A574 Standards, Imported Pack Of 50 For Home Shop, Auto And Industrial Projects

Heavy-Duty Black Oxide Socket Cap Screws, 4in, 5/16-18 UNC
✔️ 4 in long, partially threaded, 5/16-18 UNC socket cap screws

These heavy-duty socket cap screws are designed for high-torque fastening in tight areas, ideal for automotive work, machinery, and industrial setups where access is limited. The black oxide finish adds corrosion resistance and a clean, professional look.

✅ 4 in (101.6 mm) long, partially threaded
✅ 5/16-18 UNC threads (0.3125 in / 7.94 mm diameter)
✅ Internal hex drive for compact access
✅ Black oxide finish for corrosion resistance
✅ Meets ASME B18.3 and ASTM A574 standards
✅ Pack of 50 screws for home shop and industrial use

💡 What is a socket head cap screw used for in heavy-duty machinery and auto projects?

Socket head cap screws are handy fasteners that provide strong, reliable clamping in tight spaces where tool access is limited. - Handy for tight spaces where tool access is limited - Ideal for high-torque fastening in automotive and industrial gear - Implemented in standards compliance ASME B18.3 and ASTM A574 - Sold in packs (e.g., 50) for job-based needs