These are 1/4"x3.375" Axle Shafts.
 
 
 
FEATURES
Zinc plated spring steel construction.
 
 
INCLUDES
Two axle shafts
Two 7/16" Nylon lock nuts
 
SPECIFICATIONS
Length: 3.375" (axle) .5 (thread) 4.125" (total length)
Diameter: 1/48" (axle) 7/16" (thread)