HOLO-KROME 76552 M24-3 X 65mm 內六角螺絲 | 六角驅動 | 合金鋼 熱處理黑色氧化 (10 / 包)

The black oxide finish on these screws feels durable and hasn't chipped during assembly. They seated perfectly in my precision fixture without any binding.

Needed these for a jig I’m building, and the M24-3 thread cut perfectly into the tapped holes without any binding. The hex socket drive seated firmly on my Allen key, giving solid torque control—exactly what I expected from an alloy steel fastener.

The black oxide finish is holding up perfectly in my jig setup, no rust or wear after a week of heavy use. These M24 screws fit snugly into the threads and haven't loosened under vibration.