3.225 in.Inside dia.
A nonmetallic circular item with an aperature, having a solid round cross-section. They are used primarily for sealing. For items with other than round cross section, see packing,preformed. For noncircular items with a round cross-section, see seal,nonmetallic round section and rubber,round section.
NSN
NSN 6145-00-553-6286
NSN 6240-01-627-4142
NSN 5930-00-189-6661
NSN 5998-01-347-1522
NSN 6135-01-394-4160
NSN 6320-00-977-3930
NSN 5960-01-579-9493
NSN 6130-00-186-8460
NSN 5925-00-708-8769
NSN 6645-01-458-5235
NSN 6105-01-024-9907