براغي رأس أسطوانية 1/2-13 × 1-1/2 بوصة | رأس مسطحة بمقبس سداسي | حبيبات نايلون | ملولبة بالكامل | سبائك فولاذية بأكسيد حراري أسود (100/عبوة)

Installed a dozen of these on a custom jig fixture I'm building and the hex socket drive made it much easier to get good torque in a tight spot. The black oxide finish looks solid and seems like it'll resist rust better than the plain steel ones I've used before.

Used a full bag of these mounting a new fixture at the shop, and the flat head seating is perfect for countersunk holes. The black oxide finish has a nice even sheen, and the nylon pellet keeps them locked tight even with vibration. No stripped sockets or bad threads out of the hundred.

The hex socket drive made installation straightforward even in tight spots, and the nylon pellet is a nice touch for vibration resistance. I used these for a jig build and they held up well under heavy use. Exactly the quality I needed.