Flat, round
NSN 5965-01-113-9061
NSN 5960-01-048-8228
NSN 5945-01-076-4039
NSN 5985-01-114-1969
NSN 5910-01-424-0225
NSN 6135-00-235-1938
NSN 4140-01-026-1381
NSN 5905-00-439-6397
NSN 5905-00-288-0428
NSN 5855-00-198-3197
NSN 6150-00-168-9968
NSN 6135-00-196-5267