براغي هولو-كروم 73116 3/8-24 × 2-1/4 بوصة برأس أسطواني | محرك سداسي | سبائك فولاذية بأكسيد حراري أسود (50/عبوة)

Needed these for a jig I was building and the fit in the tapped holes was spot on — no binding or slop. The hex socket drive made installation quick with just an Allen key. Fifty of them should last me through several more projects.

I needed precise threads for a jig I was building, and these thermal black oxide screws threaded in smoothly with no binding. The hex socket drive seated perfectly on my driver.

The black oxide finish held up nicely during my tooling setup, no chips or wear after threading into hardened steel. These bolts seated smoothly with a hex key, though I wish the package included a few extras for the price. Solid fasteners for jigs and precision work.