For upper seat
An item of various shapes (usually circular, conical, cylindrical, or rectangular) used to prevent or regulate the flow of liquids or gases through the valve. May include a retainer, screw, holder, and the like.
Classification: Parts of taps, cocks, valves and similar appliances, nesoi
NSN 5998-01-643-3982
NSN 6110-01-433-0292
NSN 5950-01-027-9560
NSN 5965-01-580-6601
NSN 4140-01-591-0004
NSN 6685-01-308-8467
NSN 6145-01-113-5955
NSN 5996-01-040-2606
NSN 2925-01-294-0585
NSN 5855-01-385-8846
NSN 5935-01-128-3257
NSN 7035-00-623-4744