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 5935-01-367-4056
NSN 6135-00-927-5848
NSN 5925-01-539-0576
NSN 5990-01-529-8433
NSN 7035-01-123-8723
NSN 7035-01-357-3726
NSN 5960-00-057-9184
NSN 6135-01-357-0621
NSN 5855-00-237-4088
NSN 4140-00-812-6330
NSN 5925-00-529-0441
NSN 5835-01-431-2178