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 6105-01-541-4811
NSN 5930-01-254-3819
NSN 4140-01-286-1146
NSN 5996-01-202-9338
NSN 4140-01-432-1447
NSN 7035-01-483-1776
NSN 2925-01-360-2734
NSN 6610-00-907-0484
NSN 5950-01-505-0946
NSN 6105-01-398-7369
NSN 5945-01-642-6805
NSN 5950-01-222-0808