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 5945-01-136-4592
NSN 6110-01-151-2368
NSN 6650-01-487-4236
NSN 7035-00-145-9138
NSN 2925-01-487-0886
NSN 6145-00-717-8421
NSN 5905-00-274-3789
NSN 6145-00-823-6215
NSN 6150-00-466-2892
NSN 6650-01-287-2628
NSN 5905-00-564-2480
NSN 5910-01-136-6952