HOLO-KROME 32136 1/4-20 X 2" 內六角杯端止付螺絲 | 合金鋼熱處理黑色氧化 (50 / 包)

I needed a full 2-inch length to reach through a thick bracket, and these set screws threaded cleanly into the hole without any binding. The black oxide finish feels durable and should resist rust well in my shop environment.

The hex socket drive makes installing these in tight spots really simple, and the 2-inch length gives plenty of grip for clamping components. The cup point design held my shaft securely without slipping.

The black oxide finish on these set screws seems really durable—no flaking after tightening several down. Exactly the right depth for holding a pulley in place on a 2-inch shaft.