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 5960-00-720-0615
NSN 5998-01-495-0657
NSN 6645-00-814-4558
NSN 5930-01-381-2143
NSN 5985-01-566-2972
NSN 5998-01-048-7722
NSN 5996-01-552-2502
NSN 6650-01-478-5323
NSN 5985-00-466-0205
NSN 6220-00-067-7645
NSN 6145-01-216-4388
NSN 5935-01-650-2702