HOLO-KROME 08086 1/2" X 2-3/4" 內六角肩螺絲 | 內六角頭 | 六角驅動 | 合金鋼熱處理黑氧化物 (25 顆/包)

Used one of these as a pivot pin for a custom tool I built, and the precision-ground shoulder ran dead smooth. The thermal black oxide finish also held up well during assembly without flaking. Really solid hardware for the price.

I was a little worried the hex socket would strip under torque, but these alloy steel screws held up perfectly during my jig assembly. The black oxide finish gives them a nice, durable look too.

The precision ground shoulder on these screws works perfectly as a pivot point in my small assembly jig. The hex socket drive made installation straightforward with a standard allen key. They feel solid and well-made for the price.