براغي رأس أسطوانية M3-0.5 × 20mm | رأس مسطحة محرك سداسي | ملولبة بالكامل | فولاذ مقاوم للصدأ 316 (900/عبوة)

The hex socket drive on these M3 screws gives a solid grip without stripping, which I appreciate for precision jig work. They’re consistent across the whole 900-piece pack, with no burrs or threading flaws that could jam up a fixture.

These flat heads seated perfectly in my precision fixture build, and the hex drive didn't cam out even under high torque. The 316 stainless gives me confidence against corrosion in a slightly damp shop environment.

Installed a batch of these in a custom jig, and the hex socket drive grabbed perfectly without any stripping. The 316 stainless feels substantial, fully threaded along the whole 20mm length.