براغي رأس أسطوانية M10-1.5 × 45 مم | رأس مسطح مع محرك سداسي | ملولبة بالكامل | فولاذ سبائكي فئة 10.9 مع أكسيد أسود حراري (100 / عبوة)

The black oxide finish on these has held up well so far with no rust after a few weeks on my jig fixtures. The 10.9 alloy steel feels plenty stout for clamping and the threading is clean all the way down. I've used them on three different setups now and haven't had a single one bind or strip.

The hex socket drive seated perfectly on my wrench, no wobble or stripped corners even after torquing them down on a jig fixture. Threads ran smooth the whole way in, and the 10.9 alloy steel feels seriously tough for the price per hundred.

Used these on a jig fixture that gets constant torque and the 10.9 alloy steel hasn't stripped or bent at all. The black oxide finish also kept them from rusting after a coolant spill. Sizing is spot on and the hex socket drives clean.