Vent hole required
A cone-shaped, unthreaded, metallic or nonmetallic item, tapered through its entire length, primarily used to position and hold two or more mating parts in alignment.
NSN 6240-00-805-0955
NSN 5999-01-336-6891
NSN 6220-00-042-3936
NSN 6110-01-147-2487
NSN 4140-00-027-5150
NSN 6150-01-004-0030
NSN 5835-00-196-9771
NSN 6135-01-167-7604
NSN 5910-00-754-7009
NSN 5990-01-268-4268
NSN 6145-01-023-7719
NSN 5996-01-273-8033