National Stock Number: 5331-01-039-7580
  Federal Supply Class: 5331
  National Item Identification Number: 010397580
  Description: O-RING
  Detail: 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. 
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