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 6150-00-928-4961
NSN 5935-01-298-9961
NSN 5920-01-580-7753
NSN 5915-00-493-4374
NSN 6650-01-393-8971
NSN 6685-01-243-5833
NSN 5925-01-416-5603
NSN 5925-01-432-8431
NSN 7035-00-946-2642
NSN 5965-01-414-4345
NSN 5975-00-472-7778
NSN 5935-01-612-7607