Od 4.1 millimeters
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 5960-01-601-5565
NSN 5985-01-634-0635
NSN 5835-01-105-6545
NSN 5990-00-269-2226
NSN 6150-01-053-2977
NSN 6320-01-172-6103
NSN 5915-00-309-5642
NSN 6645-00-888-5820
NSN 5960-00-102-1516
NSN 5985-01-043-3214
NSN 5935-01-383-2393
NSN 5920-01-634-0250