M4-0.7 X 16mm براغي غطاء مقبس | محرك مقبس سداسي | ملولبة بالكامل | سبيكة فولاذية فئة 8.8 بأكسيد أسود حراري (900 / عبوة)

Finally got around to using these on a jig build and the black oxide finish makes them slide into tapped holes much smoother than I expected. The hex socket drive holds up well without stripping under moderate torque.

Picked up a box for a precision assembly project and was pleasantly surprised by how clean the black oxide finish is across all 900 pieces—no burrs or uneven coating. The hex socket drive engaged perfectly with my driver, and the 8.8 grade steel gives me confidence in the joint strength.

Needed some quality fasteners for a jig build and these fully threaded M4s worked perfectly. The black oxide finish looks sharp and the hex socket drive makes installation a breeze.