براغي ذات رأس أسطواني M4-0.7 X 12mm | رأس زر بمقبس سداسي | ملولبة بالكامل | فئة 12.9 من سبائك الصلب مطلية بالزنك (600 / عبوة)

On my third rebuild of a precision fixture these still thread in smooth and hold torque with zero stripping. The 12.9 alloy and clean zinc finish look like they'll outlast the machines they're going in.

Bought these for a batch of jigs and they’ve held up through constant assembly and disassembly without any stripped threads. The zinc finish is even and the 12.9 alloy steel feels seriously overbuilt for the price. My only worry is running out before the next project.

Needed a handful for a small robotics jig and these threaded perfectly into the tapped holes without any binding. The zinc coating looks uniform and should resist rust in my shop environment.