مسامير رأس مقبس 7/8-9 X 3-1/4" | محرك سداسي | حبة نايلون | جزئية الخيوط | فولاذ سبيكة أكسيد أسود حراري (10 / عبوة)

Installed these into a jig fixture I'm building and the partial thread let me cinch down two plates perfectly. The black oxide finish feels sturdy and hasn't shown any wear after repeated adjustments.

The hex socket drive gripped perfectly without slipping during assembly, making installation a breeze. These cap screws feel solid and well-machined for tooling work, and the thermal black oxide finish looks clean and durable.

These screws worked perfectly for securing a jig on my milling table, and the black oxide finish made them blend right in with the rest of the setup. They seated nicely with the hex socket drive, no stripping even under high torque.