Review on 5/8 Washer Cap Push Nuts (Pack of 8) by Hard-to-Find Fastener by Brian Carrizales

The product came quickly and was exactly what I wanted. Be aware though that at this size 3/4" diameter they are very difficult to install and I had to hit them on my axle with a very large 4 pound hammer. Both of what I tried to install warped like that so much so I gave up on my plan and decided to drill a new hole and use a cotter pin. These things may work well for diameters less than 1/2" but anything larger will probably give the same results as me unless you can access the axle and use a hydraulic press. Much luck.