1-1/4-7 × 3" براغي رأس أسطواني | رأس مسطح محرك سداسي | كامل الخيط | فولاذ سبائك أكسيد أسود حراري (5 / عبوة)

Used these to repair a heavy-duty jig in my shop, and the black oxide finish has held up perfectly with no rust after a week of coolant spray. The hex socket drive seated cleanly on my driver, no stripping. Exactly what I needed for precision tooling.

I needed a handful of strong bolts for a hydraulic press fixture, and these flat heads seated flush and held tight without any play. The black oxide finish feels durable and hasn't shown any wear after a few test cycles.

Fitting these into my jig took no persuasion at all, the hex socket seated perfectly with my allen key and the threads cut cleanly. For a 1-1/4-7 this size, the thermal black oxide coat feels tough enough to survive my workshop grime.