M16 X 25mm 內六角肩螺絲 | 內六角頭 | 六角驅動 | 18/8 不鏽鋼 (10個/包)

Finally, shoulder screws that don’t wobble when I use them as axle pins in my jig—the ground surface is dead smooth and the hex drive bites perfectly. They’re solid stainless too, so no rust worries even in the damp garage. These will last me a good while.

The precision-ground shoulder on these M16 screws is noticeably smooth, and they worked perfectly as an axle for my custom pivot assembly. Nice to find stainless steel in this specific size—should hold up outdoors without rusting.

The precision-ground shoulder made for a smooth pivot in my build—no wobble at all. Only gripe is the hex socket felt a touch shallow, but the stainless finish looks clean and held up fine so far.