HOLO-KROME 32246 5/8-11 X 1-1/2" 杯端內六角固定螺絲 | 合金鋼熱處理黑氧化物（每包 25 顆）

Needed these for a machinery alignment job and the cup point really bit into the shaft without slipping. The thermal black oxide coating seems like it'll hold up to oil and grime just fine.

The hex socket drive made torquing these set screws into a tapped hole straightforward, and the cup point bites into the shaft without slipping. They arrived clean and dry with a uniform black oxide finish, exactly as specified. Nothing fancy, but for reliable clamping on a mill job, these did the t

I needed these to secure a pulley on a motor shaft, and the cup point bit into the metal perfectly without slipping. The black oxide finish looks professional and seems like it'll resist rust in my damp shop.