Divers mask usn mark 1 model o
A ring-shaped item whose outer surface is so shaped as to form a seat for the coupling nut and the fitting between which it is assembled. It is designed to be slipped over tubing or hose so that tightening of the coupling nut to the fitting compresses the sleeve against the circumference of the tubing or hose thereby effecting a tight seal between the tubing, or hose fitting and coupling nut.
NSN 5915-01-186-4199
NSN 5905-01-316-7331
NSN 6145-01-081-6255
NSN 5915-00-629-4294
NSN 5905-01-642-8927
NSN 5930-00-218-4739
NSN 5990-01-356-4259
NSN 5935-01-406-6654
NSN 6610-01-027-8736
NSN 5996-00-597-2234
NSN 6620-00-280-2874
NSN 5950-00-190-4435