براغي رأس كبسولية M6-1 × 55 مم | محرك سداسي داخلي | ملولبة جزئيًا | فئة 12.9 سبيكة فولاذ مطلي بالزنك (200/عبوة)

The partially threaded design on these 55mm screws gripped perfectly when I was assembling a custom jig, and the zinc plating gives a nice uniform finish without any burrs. They threaded smoothly into my steel fixture without binding.

The hex socket drive made installation quick with my Allen key, and the 55mm length was perfect for clamping down a jig plate. The zinc coating looks clean and professional on my assembly table.

Used these for a fixture I’m building and the hex socket drive held up perfectly under a torque wrench—no stripping at all. The 12.9 alloy steel feels seriously tough, and the partial threading made aligning the plates a breeze.