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 5920-01-535-6498
NSN 6110-01-525-1298
NSN 5960-00-538-2252
NSN 6320-00-242-3300
NSN 2925-01-153-7794
NSN 6610-01-516-7278
NSN 5950-00-789-3025
NSN 6220-00-358-9580
NSN 6105-01-323-7679
NSN 6135-00-269-5843
NSN 5999-00-999-4058
NSN 6620-01-530-7538