M12-1.75 x 50mm 內六角螺絲 | 低頭六角驅動 | 部分螺紋 | 10.9級合金鋼 熱處理黑色氧化 (50顆/包)

The low head profile was exactly what I needed to clear a tight space on my tooling fixture, and the black oxide finish looks robust. These screws torqued down smoothly without any galling—solid feel overall.

Threads are clean and the black oxide finish looks uniform across all fifty screws, so they'll blend in nicely on my jig table. The hex socket drive seated firmly with my Allen key, and the partial threading gave me just enough grip for a 10mm plate stack.

I needed some high-strength fasteners for a jig I’m building, and these cap screws threaded in smoothly without any binding. The partial threading gave me enough grip for the clamping force I needed, and the black oxide finish seems durable so far.