براغي رأس أسطوانية 1/4-28 × 5/8 بوصة | رأس زر مع مقبس سداسي | حبيبات نايلون | ملولبة بالكامل | فولاذ سبائكي بطبقة أكسيد أسود حراري (100 / عبوة)

The black oxide finish on these screws held up perfectly against the light oil and debris in my milling setup. They seated smoothly into the threaded holes on my fixture plate without any galling. This is my second pack for tooling builds, and the nylon pellet locking feature really does keep them f

Needed some precise fasteners for a jig I was building, and these button heads fit perfectly without sticking up too far. The thermal black oxide finish seems durable and gave them a clean, professional look right out of the bag.

The black oxide finish on these screws is holding up well in my tooling fixtures, and the nylon pellet locks them in place without needing threadlocker. They seat flush with a 5/32 hex driver, exactly as expected for precision work.