براغي رأس أسطوانية بمفتاح سداسي M8-1 × 45 مم | محرك سداسي داخلي | ملولبة جزئيًا | سبائك فولاذ درجة 12.9 بأكسيد أسود حراري (100 / عبوة)

The partially threaded design made installing these into my fixture plate much easier than fully threaded bolts would have been. They seated perfectly with a hex key and the black oxide finish looks clean and professional.

The black oxide finish on these M8-1 x 45mm screws looks sharp and gives them a nice grip when wrenching. Threads cut cleanly into my tooling plates with zero binding, and the 12.9 alloy steel feels seriously tough for the price.

Installed these on a jig I'm building and the partial threading grabbed perfectly without slipping. The black oxide finish seems like it will hold up well against the oily shop environment.