A metallic item which mounts upon or in a manhole and will accommodate a cover, manhole.
NSN 5905-01-472-2027
NSN 5835-00-581-9460
NSN 5895-00-192-7542
NSN 6150-01-594-6350
NSN 6320-01-372-7388
NSN 6650-01-436-3478
NSN 5999-01-159-6373
NSN 6645-00-583-0066
NSN 5985-01-540-6939
NSN 5835-01-495-0595
NSN 5925-01-278-8188
NSN 6320-00-546-9249