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 6610-01-593-0135
NSN 6645-01-076-4655
NSN 5965-01-306-6527
NSN 5930-01-352-6319
NSN 6135-00-756-6149
NSN 5990-01-243-4233
NSN 6150-01-523-9317
NSN 6150-00-195-1827
NSN 5905-00-759-6261
NSN 5990-01-485-0260
NSN 6610-00-394-9879
NSN 6610-01-614-3720