These custom mild steel washers were manufactured with plain finish to work on a T-bolt and nut assembly for an agricultural equipment application.  Medium steel material was used for additional strength and the inside diameter set to .406" +/-.015" to fit over 3/8-20 thread on the bolt.  The outside diameter was set to .815" +/- .015" and thickness set to .086"-.132".  Full certs were made available with the parts and.