براغي ذات رأس مقبس M16-2 × 110 مم | رأس مسطح مع محرك سداسي | ملولبة جزئيًا | فئة 12.9 من سبائك الصلب مطلية بالزنك (25 / عبوة)

Used these on a jig frame for a milling setup, and the partially threaded length gave just the right grip without bottoming out. The zinc plating held up fine even with some coolant splashing around. Fits the M16 hex key snugly, no slop at all.

The hex socket drive made tightening them in a tight jig frame much easier than using a standard wrench. These feel solid and the zinc coating is a nice touch for longevity.

Installed these in a heavy steel jig fixture last week, and the 12.9 alloy steel held up perfectly under high torque without any sign of stripping. The partially threaded design made alignment much easier than fully threaded bolts.