براغي رأس أسطواني M3-0.5 × 10 مم | محرك سداسي داخلي | ملولبة بالكامل | فئة 12.9 سبائك فولاذية مؤكسدة سوداء حرارية (900/عبوة)

The hex socket drive seated perfectly with my Allen key, and the 12.9 alloy steel feels rock solid in my fixture builds. 900 screws for this price is a no-brainer, and the black oxide even looks clean on my jig table.

Just unpacked these for a robotics jig I've been building and the hex socket drive fits my driver cleanly without slipping. The 12.9 alloy steel feels noticeably harder than the standard cap screws I used before, which should hold up well under repeated torque.

Ordered these for a jig I’m building and the black oxide finish looks sharp, plus the 12.9 alloy steel feels reassuringly rigid when torqued down. Threads were clean and uniform across all nine hundred, no duds in the bag. Packed tight in a solid box, which I appreciate when storing them on the shel