The item has four holes in it
A circular shaped item designed to be installed in a specially prepared groove or counterbore to provide a low pressure seal. It may be supplied in various cross-sectional shapes and is cut through at one point to allow for installation and fitting. Excludes items whose primary function is to provide sealing, wiping, or wearing surface capabilities for piston configurations. See also ring, piston and ring, wiper.
Classification: Gaskets,washers & other seals
NSN 6220-01-490-5681
NSN 4140-00-274-9638
NSN 6685-01-634-0611
NSN 5965-00-893-2509
NSN 5855-01-378-1888
NSN 7035-00-270-5519
NSN 5835-01-564-5575
NSN 5999-01-110-6838
NSN 5945-01-529-1182
NSN 6105-01-114-8036
NSN 5835-01-111-9838
NSN 6240-00-816-6749