براغي هولو-كروم 73054 مقاس 1/4-28 × 3/8 بوصة برأس مقبس سداسي من الفولاذ السبائكي بطبقة أكسيد حراري سوداء (100 / عبوة)

Exactly the right length for my jig build—the black oxide finish looks clean and adds some corrosion resistance. Took a standard hex key without any wobble, which saved me time on assembly.

Put these into a precision alignment fixture for my lathe, and the threads engaged smoothly with consistent torque. The black oxide finish gave them a nice uniform look and seems to resist the coolant spray on the shop floor.

Needed a hundred of these for a jig I’m building and the black oxide finish looks clean, plus the threads seated perfectly in my 1/4-28 tap. They’re solid enough for the tooling pressure I’m putting on them, and the box arrived with every screw accounted for.