براغي رأس كبسولية 1/4-20 × 1-1/2 بوصة | محرك سداسي رأس مسطح | حبيبات نايلون | ملولبة بالكامل | فولاد سبائكي أسود حراري (100/عبوة)

I used a handful of these for jig assembly, and the hex socket drive made tightening them in tight spots effortless. The black oxide finish on the alloy steel feels really durable, and the nylon pellet kept them from backing out under vibration. Great value for a hundred pack.

The nylon pellet locks them in place firmly, so they don’t back out after a day of vibration on the jig. Threads cut clean into steel without any galling, and the black oxide coating hasn’t chipped or smeared after repeated tightening.

The black oxide finish is holding up great so far—no wear after a few days of repeated fitting in my jig setup. All 100 came with clean threads and the hex drive bites perfectly with a 5/32 Allen key.