These Are The Standard Skateboard Nut and Bolt Sizes
Skateboards use standard, off-the-shelf hardware. You can save money by buying it in bulk from somewhere like McMaster-Carr or your local hardware store* instead of paying skate shop markups. Here are the standard hardware-store sizes.
Axles take 5/16”-24 nylock jam nuts. If you have precision trucks like Rogues, you may want the taller standard nuts.
Kingpins take 3/8”-24 nylock jam nuts. Bushings have a standard 1” outer diameter, so you’ll want these flat washers.
Mounting hardware is 10-32. You can get bolts in various lengths and styles (street skateboards generally take flat head 7/8” without risers or 1” with risers, while longboards use 1 1/4” or longer, depending on risers). The nuts are standard lock nuts.
*Most hardware stores keep 10-32 hardware in stock, but you’ll probably have to special order axle nuts and kingpin nuts. Also, while home improvement stores like Home Depot and Lowe’s sell hardware, they are not hardware stores. They generally charge much higher prices for fasteners and sell them in smaller quantities, so it’s worth checking out your local Ace Hardware or a comparable store.