M4 x 10mm 肩式螺絲 | 內六角頭 | 內六角驅動 | 18/8不鏽鋼 (25 / 包)

I needed precision axles for a small custom build, and these screws have the tightest tolerance on that shoulder I've seen at this price point. They thread smoothly into aluminum without any binding. Exactly what I needed for a clean pivot.

I’ve used these as pivot pins for a small jig, and the precision-ground shoulder makes for a surprisingly smooth, wobble-free fit in the bearing bore. The 18/8 stainless finish also feels solid and corrosion-resistant, so no worries about rust in a humid shop.

The shoulder on these is machined so precisely that the hex wrench slots in without any wobble. I used them as axle pins on a camera rig and they spin perfectly true, and the 18/8 stainless finish hasn't shown a single speck of rust after a few humid weeks.