The default specifications are: all fillet radii should be .12 unless otherwise specified. Additionally, the maximum allowable wall thickness is 0.125 with a minimum of 0.90. The permissible draft is up to 2 units, applicable where necessary. Finishing must adhere to MIL-STD-171 Finish 20.24, and the color should be aircraft green. Type 1 primer is to be used.