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 5895-01-125-7137
NSN 5998-01-508-7734
NSN 6220-00-893-8777
NSN 5985-00-971-2056
NSN 6105-01-505-3367
NSN 5965-01-313-3845
NSN 5935-01-396-8587
NSN 6610-01-129-8404
NSN 5855-00-548-4742
NSN 6150-01-561-0150
NSN 6220-00-292-3917
NSN 6105-01-045-7917