براغي رأس مقبس HOLO-KROME 72198 7/16-14 × 1-1/2 بوصة | محرك مقبس سداسي | سبيكة فولاذ أكسيد أسود حراري (50 / عبوة)

Torqued these into a fixture plate for a jig build and the hex socket drive seated perfectly every time, no stripping. The 7/16-14 threads cut clean and the thermal black oxide coating held up to some wrench scuffs without flaking.

Finally, a box of 50 socket cap screws that actually holds up under real torque. The hex socket drive seated perfectly with my allen wrench, and the thermal black oxide coating looks sharp on my jig setup. These are my go-to for precision assemblies now.

The black oxide finish on these screws looks great and seems durable, no rust after a week of use in my shop setup. They threaded smoothly into my fixture with no binding, which was a relief for a tight tolerance assembly.