براغي رأس مقبس 1/4-28 × 1" | محرك مقبس سداسي | حبيبة نايلون | ملولبة بالكامل | فولاذ سبائكي أكسيد أسود حراري (100 / عبوة)

I’ve been using these for replacing worn fasteners on a jig fixture, and the hex socket drive made installation noticeably easier with a ball-end Allen. The nylon pellet locking feature held the screws securely in place without any backing out during use.

The black oxide finish on these screws has held up perfectly in my jig setup, no rust or galling after weeks of use. The nylon pellet does its job too—once torqued down, they stay put without backing out.

Put these in a fixture at work and the nylon pellet held position perfectly under vibration—exactly what I needed for jig assembly. The threads cut clean without any binding, and the thermal black oxide finish gives them a nice uniform look.