As-568a o-ring size -258
No other part numbers with same form, fit, and function found.
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.
Classification: Gaskets, washers and other seals, of vulcanized rubber other than hard rubber
NSN 6240-00-244-0483
NSN 5925-01-431-8437
NSN 5910-00-837-3231
NSN 6130-01-367-2869
NSN 4140-00-288-6898
NSN 6145-00-900-1851
NSN 6220-01-487-2229
NSN 7035-01-202-8172
NSN 5965-01-484-9818
NSN 5945-01-074-2118
NSN 6645-00-679-8203
NSN 5950-00-019-8191