HOLO-KROME 09007 8mm X 16mm ソケットショルダーネジ | 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 (25本入)

Used these as pivot pins in a custom indexing fixture, and the precision ground shoulder ran true within a few tenths. The black oxide finish slides smoothly in the bushing without galling.

The precision ground shoulder on these is spot on; they slide into my jig's alignment holes with zero wobble. Each screw in the pack looks consistent and the black oxide finish already makes them resist a little surface rust.

Finally, shoulder screws that actually fit like they should—the precision ground shoulder is dead on, so my pivot assembly runs smooth with zero wobble. Hex drive seated perfectly with no stripping, and the black oxide finish looks sharp.