HOLO-KROME 76168 براغي رأس كبس مقبس M6-1 × 16 مم | محرك مقبس سداسي | فولاد سبائكي أكسيد أسود حراري (100 / عبوة)

Black oxide finish is holding up great after a week of clamping and unclamping on my fixture table, and the hex socket drive gives a solid bite every time with my Allen key. Threads ran smooth into both steel and aluminum without any galling. For a hundred pieces at this price, these are a no-braine

Used these for a jig on the mill and the black oxide finish held up great against cutting oil splatter. The hex socket drive gave a solid, no-slip grip during tightening.

These are perfect for a quick prototype fixture I was building; the hex socket drive made installation in tight spots a breeze. The black oxide finish looks clean and seems like it will resist rust well in the shop.