براغي رأس مقبس M16-2 × 480 مم | محرك مقبس سداسي | ملولبة جزئيًا | فئة 12.9 فولاذ سبائكي أكسيد أسود حراري (4/عبوة)

Was pleasantly surprised by the thread quality on these screws—they started cleanly and seated perfectly in tapped holes. The black oxide finish looks professional and should resist minor rust on the shop floor.

Installing these on a heavy-duty jig and the partial threading grabbed perfectly without needing extra spacers. The black oxide finish adds a nice layer of corrosion resistance.

I needed a threaded rod longer than my usual options for a jig build, and these 480mm socket cap screws fit the bill perfectly. The hex socket drive gave me a solid grip during tightening, and the black oxide finish looks clean and professional.