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 6220-00-009-6099
NSN 5835-01-540-4995
NSN 5930-01-357-0187
NSN 5975-01-506-2618
NSN 6145-01-573-9716
NSN 6620-01-448-1423
NSN 4140-00-350-5441
NSN 6320-01-449-1014
NSN 5975-00-089-3905
NSN 5910-00-434-9715
NSN 6150-01-469-1544
NSN 5950-01-441-3110