Versions
MIL-PRF-22750G Is the most recent version of the spec where MIL = Military, PRF = Performance Specification, 22750 = Unique identification number, G = Version.
MIL-PRF-22750F Revision F was established in May 1994. This was superceded by G in September 2011 with a further amendment in April 2014.
MIL-C-22750E Was established in July 1989, where C = Coating. This superceeded version D, established in Nov 1980.