براغي رأس أسطوانية 1/4-28 × 7/16 بوصة | رأس منخفض سداسي | سبائك فولاذية بأكسيد أسود حراري (200 / عبوة)

Used these on a precision fixture at work and the low head profile cleared the clearance issue I was having with standard caps. The thermal black oxide finish handles shop grime well, and all 200 in the bag were clean and threaded true.

The hex socket drive grips my Allen key cleanly with zero stripping on the first few installs. The 7/16" length sits perfectly flush in my fixture plates, and the black oxide finish hasn't shown a spot of rust after a week in the shop.

Exactly what I needed for a jig build—these low head screws snugged into tight spots where standard caps wouldn't fit. The hex drive seated cleanly without stripping, and the black oxide finish feels durable.