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 6320-00-575-6072
NSN 6685-00-290-0209
NSN 5960-01-111-5142
NSN 5990-01-324-1204
NSN 5996-01-341-0828
NSN 6135-00-444-1402
NSN 5920-00-252-3197
NSN 7035-01-659-8317
NSN 5930-01-550-4012
NSN 5920-01-424-8094
NSN 6320-01-631-7828
NSN 6105-00-900-4143