Part of the fun of building a home wall is hammering the t-nuts! I promise, you'll love it. Ok, maybe not, but they're a must have for your climbing wall. How many T-nuts does a wall need? Average is around 100 T-nuts per sheet of 4x8 plywood. Packs of 100 will give you a good start, and don't forget to pick up wafer screws to keep these t-nuts in place!