M20 x 90mm 內六角肩螺絲 | 內六角頭 | 六角驅動 | 合金鋼 (10個/包)

The precision-ground shoulder on these screws made aligning them in my pivot assembly effortless. They slide in smoothly and hold tight without any wobble, exactly what I needed for a bearing surface.

Got these for a custom jig I'm building and the precision-ground shoulder made alignment much easier than with standard bolts. The hex socket drive is clean and takes torque well without stripping.

These shoulder screws took the slop out of a linkage I was building—the precision-ground surface spins true in its bearing race. The hex socket drive made torquing them down to spec a breeze with no cam-out. Exactly what I needed for a clean mechanical pivot.