براغي ذات رأس أسطواني M4-0.7 X 40mm | محرك سداسي داخلي برأس مسطح | ملولبة جزئيًا | فولاذ سبائكي فئة 12.9 مطلي بالزنك (400 / عبوة)

Installing these in a jig for a custom tooling project, the hex socket drive grabbed perfectly without stripping. The zinc plating gives them a clean, consistent finish that resists rust. Exactly what I needed for precision assemblies.

The partially threaded design makes these screws grab perfectly in my jig builds without slipping, and the zinc coating looks clean and consistent across all 400 pieces.

Picked up a pack of 400 of these for a fixture build, and the hex socket drive made installation a breeze with no stripping issues. The zinc plating looks even and consistent across all screws, which gives me confidence they'll hold up in the shop.