A flat rigid item provided with holes or similar means for attaching to a container for the purpose of holding an observation window in place.
NSN 5925-01-505-1126
NSN 6220-01-097-6202
NSN 5945-01-043-4024
NSN 6220-01-227-7307
NSN 5965-00-142-9052
NSN 5835-01-350-0566
NSN 6645-01-481-9834
NSN 2925-01-474-3363
NSN 6145-00-989-9613
NSN 5945-01-336-6573
NSN 6110-01-197-6954
NSN 6135-01-255-9129