M12-1.75 X 35mm براغي ذات رأس مقبس سداسي | رأس مسطح مع محرك سداسي | ملولبة بالكامل | فئة 12.9 فولاذ سبائكي مع أكسيد أسود حراري (100 / عبوة)

Needed 500 of these M12 bolts for a set of precision fixtures I’m building, and the consistent threading across every single one saved me a ton of retapping time. The black oxide finish is holding up well against occasional coolant splashes, too.

Installed these on a jig last week and the 12.9 alloy steel cut down on vibration noticeably compared to the standard 8.8s I've been using. The black oxide coating is nice and even across all 100 pieces, no burs or thread damage right out of the bag.

Took a chance on these for a tooling fixture, and the hex socket drive seated perfectly with no stripped heads even under torque. The black oxide finish looks professional and held up without any rust after a week in a damp shop.