What size key"

[DaddyT65]

Just ordered a live axle and hubs from Northern Tool that have 1/4" wide keyways. I am not sure of the height of the keyways. Does anyone know if the keyways are 1/4" tall that would require a 1/2" tall key to fill in both sides. I wanna have these ready when my order comes in.

 

[tazmannusa]

The standard would be 1/4" x 1/4" square key the key ways are 1/8" + deep on the axle and hubs