HOLO-KROME 08150 3/4 X 6インチ ソケットショルダースクリュー | ソケットヘッド | ソケットドライブ | 合金鋼サーマルブラックオキサイド (10 / パック)

The shoulder on these is ground so precisely that my shaft runs dead smooth with zero wobble. I used them as axles on a custom cart and they took the load without any play. These are exactly what you need for precise mechanical assemblies.

I needed a solid pivot for a jig I'm building, and these 3/4" x 6" shoulder screws fit perfectly and didn't bind at all. The hex socket drive made installation easy with a standard Allen key, and the thermal black oxide finish seems durable so far.

The precision ground shoulder on these screws worked perfectly as a bearing surface for a custom jig I'm building, and the thermal black oxide finish looks clean. They seated smoothly with no wobble, exactly what I needed for a rotating pivot point.