A metallic item for mounting upon a frame, manhole and completely closing the opening.
Classification: Other articles of iron or steel not wire nesoi
NSN 5965-01-529-8437
NSN 6150-01-578-6239
NSN 5905-01-403-2806
NSN 2925-00-081-6835
NSN 5925-00-350-3069
NSN 6620-00-807-6954
NSN 5975-00-269-4365
NSN 5975-01-428-2627
NSN 2925-01-270-1124
NSN 6645-01-440-0755
NSN 6150-01-480-5491
NSN 5975-01-185-3694