Plate has a recess for an o-ring.
A metallic or nonmetallic item which is rigid, flat and generally smooth. Its thickness is small in comparison to its length and width. It is designed for mounting another item and may have drilled or threaded holes or other facilities for mounting to a supporting object or surface. See support, as modified. Do not use if a more specific name applies.
NSN 5905-01-634-0595
NSN 5985-01-455-0321
NSN 6105-01-192-3049
NSN 5950-00-880-1966
NSN 7035-00-079-7189
NSN 5855-01-006-1827
NSN 6610-01-260-6320
NSN 5965-01-305-2858
NSN 5920-00-450-1978
NSN 2925-00-545-2285
NSN 5925-01-208-6344
NSN 2925-01-554-5246