براغي كبس صامولة 7/8-9 × 5 بوصة | محرك سداسي | بلاستيك نايلون | ملولب جزئيًا | فولاذ سبيكة مؤكسد أسود حراري (10 / علبة)

These screws held perfectly when I used them to secure a jig on my drill press. The black oxide finish looks clean and the hex socket drove smoothly without cam-out.

Used a pair of these for a shop-built fixture and the black oxide finish held up nicely under the clamp load. The nylon pellet really did keep the screw from backing out during vibration from the mill.

The threads on these were clean enough to start by hand, which saved me a ton of time on a jig I was rebuilding. The black oxide finish feels durable and hasn't shown any wear after a full day of clamping and unclamping. Only wish they came in a larger pack, but the ten I got are perfect so far.