Washer, M4.5 x 17.7

These washers fit perfectly on my Sieg SX2.7L handwheel, and the 17.7 mm outer diameter was exactly what I needed. The 1.48 mm thickness feels sturdy enough to handle the torque without deforming.

Needed a few of these for my bench mill handwheel and the 17.7 mm outer diameter fits perfectly in the recess. The metal feels solid and they seated nice and flat without any wobble.

The 1.48 mm thickness of these washers gives them just enough heft to feel solid under the handwheel screws. They fit the M4.5 hole perfectly and the large outer diameter distributes load better than the smaller ones I tried.