A metallic item which mounts upon or in a manhole and will accommodate a cover, manhole.
NSN 5910-01-390-6561
NSN 6135-01-074-2529
NSN 6240-00-017-9006
NSN 5985-00-964-7692
NSN 6110-01-555-9021
NSN 6650-00-140-8776
NSN 5999-00-269-5320
NSN 6145-00-736-8338
NSN 5925-01-307-5497
NSN 5930-00-964-7363
NSN 5930-00-504-9359
NSN 6645-00-008-3944