M2.5-0.45 X 16mm براغي رأس سداسية داخلية | رأس زرية بمحرك سداسي داخلي | ملولبة بالكامل | فولاذ سبائكي فئة 12.9 مؤكسد أسود حراريًا (600 / عبوة)

Put these in a small assembly jig I'm building for RC parts, and the hex socket drive made them much easier to tighten in tight spots. The black oxide finish also seems more uniform than cheaper packs I've used.

The black oxide finish on these screws is really consistent and clean—no flaking or uneven patches. I used them on a small jig for a CNC project and the hex drive seated perfectly without stripping. Solid value for a box of 600.

The 12.9 alloy steel is noticeably stronger than the 18-8 stainless I used before, and the thermal black oxide finish looks great on my precision fixture. All 600 screws in the bag were cleanly threaded and seated perfectly with a 2mm hex driver.