4 flats on outside surface
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 6320-01-531-4997
NSN 5985-01-439-8726
NSN 5925-00-140-6367
NSN 6685-01-024-9508
NSN 5930-01-250-2636
NSN 2925-01-206-7948
NSN 6320-00-456-2092
NSN 6220-01-542-4671
NSN 5915-00-401-7636
NSN 5950-01-314-5609
NSN 6130-00-834-2764
NSN 5935-01-498-4102