O rings can be molded in a widde range of compounds in hardnesses from 40 to 95 shore a; this is acrylonitrile butadien (nbr)
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 5999-01-344-0450
NSN 5960-01-142-1995
NSN 5855-01-606-1483
NSN 5935-00-476-4787
NSN 6240-01-287-1328
NSN 6685-00-238-0100
NSN 2925-01-025-0082
NSN 4140-00-443-9732
NSN 5925-00-300-3216
NSN 6240-00-271-5995
NSN 6145-00-462-0594
NSN 5998-01-256-6550