براغي ذات رأس أسطواني M16-2 × 80 مم | محرك سداسي | ملولبة جزئيًا | فئة 12.9 فولاذ سبائكي مع أكسيد أسود حراري (25/عبوة)

These screws feel incredibly solid for the price, and the black oxide finish adds a nice professional look. They threaded smoothly into my jig assembly with no need for extra force. Exactly the quality I needed for shop tooling.

I needed high-strength fasteners for a heavy-duty jig build, and the 12.9 alloy steel on these M16 screws is noticeably tougher than standard hardware. The hex socket drive bit perfectly, and the black oxide finish feels durable.

The partially threaded design on these M16 screws made aligning them in my jig much easier than fully threaded bolts. They torqued down smoothly without any binding, and the black oxide finish looks great on the tooling. Exactly the quality I needed for heavy-duty machinery repairs.