براغي ذات رأس أسطواني #10-32 × 2-3/4 بوصة | محرك سداسي مسطح الرأس | فولاذ سبائكي، أكسيد أسود حراري (50/عبوة)

I needed a full box of these for a jig setup and the 2-3/4" length was exactly right, no threading surprises. The black oxide finish gives them a nice, consistent grip in the socket wrench, and all 50 arrived clean and deburred.

Finally got around to mounting these on a tooling fixture and the hex socket drive made installation a breeze. The black oxide finish looks great and seems durable, though I wish the package included a few extras for the price.

I used these for a jig assembly on my drill press, and the black oxide finish gave them a nice grip without extra lubricant. Only complaint is that the 2-3/4" length was a hair short for one application, but they fit perfectly where I needed them.