براغي ذات رأس مقبس مسطحة HOLO-KROME 61016 1/4-28 × 3/8 بوصة | محرك سداسي المقبس | فولاذ سبائكي مع أكسيد حراري أسود (100 / عبوة)

The black oxide finish on these screws feels tough and consistent, and the flat head sits flush perfectly in my jig assembly. Needed a full box for a small production run, and the 100 count was exactly what I needed.

Was pleasantly surprised by the smooth hex socket drive on these—no stripping even at higher torque. The black oxide finish looks sharp and should resist rust well in my machinery setups.

Pulled a few of these out for a jig I was building and the flat head seating is flush every time, no wobble. The thermal black oxide coating looks solid and hasn't chipped even after tightening them down with a hex key. Bag of 100 will last me a long while.