براغي رأس مقبس M5-0.8 × 6 مم | رأس مسطح محرك مقبس سداسي | خيط كامل | فولاذ سبائك درجة 12.9 أكسيد أسود حراري (900/عبوة)

Bought these for jig-building and the black oxide finish is holding up nicely without any rust spots after a couple of weeks on the bench. The 12.9 alloy steel feels seriously rigid for the price, and threading them into tapped holes is smooth every time.

The hex socket drive grips perfectly even in tight spots on my precision assemblies. Nice tight tolerances across all 900 pieces, no duds in the pack.

Used these on a couple of jigs and the black oxide finish looks sharp while holding up well under repeated clamping. The hex socket drive seated perfectly with my driver, and the 12.9 alloy steel feels stout for the price. A box of 900 is plenty to keep me stocked for a long while.