3/8-16 Inch Socket Head Cap Screws Bolts 1-1/4 Inch Long Full Thread 12.9 Grade Alloy Steel Black Oxide Finish Allen Hex Drive 5/16 Inch Heavy Duty Tough As Nails Hardware Pack 10

3/8-16 Socket Head Screws, 1-1/4 in Long, 12.9 Alloy
✔️ 5/16 in Allen hex, full-thread, head dia 0.54-0.562 in, pack 10

These heavy-duty socket head cap screws are forged from 12.9 grade alloy steel and finished with black oxide for a clean, non-reflective look. They’re designed for demanding industrial assemblies like press frames, hydraulic power units, trailer hitches, and large gear reducers.

✅ 3/8-16 x 1-1/4 in full-thread bolt
✅ Head diameter 0.54-0.562 in (13.72-14.27 mm)
✅ Head height 0.375 in (9.5 mm)
✅ Drive size 5/16 in Allen hex
✅ Material: 12.9 grade alloy steel with black oxide finish
✅ Pack of 10 bolts

💡 What is a socket head cap screw used for? Socket head cap screws are handy fasteners used in heavy machinery to create strong, flush joints where space is tight and high torque is needed. - Common applications include press frames, hydraulic units, and large gear reducers - Full-thread engagement maximizes clamping and simplifies through-hole assemblies - 12.9 alloy steel with black oxide finish provides high strength for demanding setups