HOLO-KROME 720000273 براغي ذات رأس أسطواني #4-40 × 1-1/2 بوصة | محرك سداسي | فولاذ سبائكي أسود حراري (100/عبوة)

The black oxide finish on these is evenly applied and hasn't chipped during repeated assembly and disassembly on my fixture. They thread cleanly into tapped holes without binding, and the hex socket drive holds the wrench firmly.

I needed some precise fasteners for a small jig I’m building, and these #4-40 x 1-1/2" socket cap screws threaded in perfectly without any binding. The hex drive made installation quick.

The thermal black oxide finish held up perfectly during assembly on my tooling fixture—no smearing or wear after repeated wrenching. Threads seated cleanly in the tapped holes, and the hex socket drive gripped firmly without stripping. Exactly what I needed for precision jig work.