براغي رأس كبسولة HLO-KROME 65026 5/16-24 × 3/8 بوصة | محرك سداسي رأس زر | فولاذ سبائكي أكسيد أسود حراري (100 / عبوة)

Used these for mounting a jig fixture on the mill table, and the hex drive made installation quick in tight spots. The threads cut cleanly without any binding, and all 100 screws had consistent depth and finish.

The black oxide finish on these screws looks clean and should resist rust well in my shop jigs. They seated smoothly with a hex key and held firm at the specified torque. Exactly what I needed for securing a small fixture plate.

Used a handful of these to hold a drill jig together, and the hex socket drive makes them easy to snug up in tight spots. Threads cut clean into the 5/16-24 holes without any binding, and the black oxide finish looks uniform. Fine for tooling work, no complaints.