براغي رأس مقبس 1/4-20 × 7-1/2 بوصة | محرك سداسي المقبس | ملولبة جزئيًا | فولاذ سبائكي أكسيد أسود حراري (50/عبوة)

I needed a 7.5-inch screw with a hex socket for a jig I was building, and these fit perfectly without any stripping. The black oxide coating feels durable and hasn't shown any wear after a few days of use.

Finally a socket cap screw long enough for my jig builds—the 7-1/2" length was exactly what I needed for a thick fixture. The hex socket drive bit seated firmly without stripping, and the black oxide coating seems durable so far.

The thermal black oxide finish is a nice touch for a shop environment—sheds rust way better than plain steel. I bought these for a drilling jig and the partial threading gave me plenty of grip without bottoming out. Fifty in the pack means I've got spares for the next project.