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 5895-01-386-5694
NSN 5950-00-434-9296
NSN 5965-01-417-3211
NSN 5915-00-107-4298
NSN 5975-01-131-8218
NSN 6685-01-430-3478
NSN 6220-01-642-8678
NSN 6135-00-221-4720
NSN 6620-00-807-6954
NSN 5990-01-032-3832
NSN 6105-00-861-2674
NSN 6220-01-622-7783