A metallic item which mounts upon or in a manhole and will accommodate a cover, manhole.
NSN 5835-00-315-3797
NSN 5945-01-514-8554
NSN 6610-01-512-2025
NSN 6150-00-644-7707
NSN 5998-00-498-4346
NSN 6685-00-695-7129
NSN 5999-01-389-1906
NSN 5996-00-969-9882
NSN 5965-01-564-5039
NSN 6645-01-606-2164
NSN 5910-01-424-8786
NSN 6105-00-244-1922