1/2-13 × 1-1/2" براغي رأس كبس | رأس زر محرك سداسي | حبيبة نايلون | ملولبة بالكامل | فولاد سبائك أسود حراري (100 / عبوة)

The black oxide finish on these button head screws is holding up well during my fixture assembly, and the nylon pellet locking feature is a nice touch for preventing loosening under vibration. I used a full bag on a jig build and every one threaded smoothly without any galling.

I needed a batch of ½-13 fasteners for a jig build, and these button heads with the nylon pellet are perfect for locking the threads in place without extra Loctite. The black oxide finish is clean and feels durable for repeated tooling adjustments.

The hex socket drive seated my Allen wrench perfectly without any wobble, and the threads cut cleanly into my steel jig. Each screw came uniform out of the bag, though I wish the package included a few extra for the ones I dropped under the bench.