براغي رأس مقبس مقاس M27-3 × 180 مم | محرك مقبس سداسي | خيط جزئي | فولاذ سبائكي فئة 12.9 مطلي بالزنك (10 / عبوة)

Installed these in a heavy-duty jig for a production run, and the partially threaded design gave me just the right grip without bottoming out. The zinc plating has held up well under clamping pressure, no galling so far.

The hex socket drive on these screws really lets you apply full torque without cam-out, and the 12.9 grade steel feels rock solid for heavy jig work. Used them on a press fixture and the zinc plating took the shop abuse without a spec of rust.

Finally, bolts that don't strip or break under serious torque; the Class 12.9 steel feels much tougher than the usual hardware store stuff. The hex socket drive on these M27s fits my wrench perfectly for snugging up on a machine base.