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Home/Military Standard parts/Seals & Fittings/FSC 5331
Category // FSC 5331 · 53,078 items

O-Ring

Round-section sealing rings used in grooves to seal fluid and gas connections; every item filed here is an O-ring.

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53,078 items

  1. O-RING NSN 5331-00-285-9771 P/N AS3569-227 · AN123987 · AN123987 · AS3569-227 · +1 more
  2. O-RING NSN 5331-00-285-9539 P/N 3213064 · 3238830 · 3238830 · 3213064 · +1 more
  3. O-RING NSN 5331-00-285-8561 P/N S8057AY11 · S8057K11 · S8057K11 · S8057AY11 · +1 more
  4. O-RING NSN 5331-00-285-6870 P/N 3238272 · 2409-1186 · 25C504 · 3238272 · +1 more
  5. O-RING NSN 5331-00-279-9409 P/N MIL-DTL-25988/1 · M25988/1-210 · MIL-R-25988/1 · M25988/1-210ES · +1 more
  6. O-RING NSN 5331-00-279-9391 P/N MILR25988 · M25988/1-328 · MIL-DTL-25988/1 · 2-328-A · +1 more
  7. O-RING NSN 5331-00-279-9388 P/N 69494J326 · M25988/1-326 · MILR25988 · MIL-DTL-25988/1 · +1 more
  8. O-RING NSN 5331-00-279-9352 P/N MIL-R-25988/1 · MIL-DTL-25988/1 · M25988/1-241 · 5331PL1738641 · +1 more
  9. O-RING NSN 5331-00-274-7252 P/N ARP568-920MILG22050 · AS568-920MILG22050GR1 · ARP568-920MILG2 2050 · AS568-920MILG22050GR1 · +1 more
  10. O-RING NSN 5331-00-264-0032 P/N EP8-0375-093 · 2-110E540-8 · 00696 · 2-110E540-80 · +1 more
  11. O-RING NSN 5331-00-263-9540 P/N 2-212E540-80 · H467AH001 IT58 · 2-212E540-80 · E0540 2-212 · +1 more
  12. O-RING NSN 5331-00-256-6708 P/N 2532499-240 · 2532499-240 · ARP240-9250 · 2532499-240 · +1 more
  13. O-RING NSN 5331-00-256-3067 P/N 2532499-113 · ARP113-9250 · 2532499-113 · 00011300MG · +1 more
  14. O-RING NSN 5331-00-255-5338 P/N 2-236E540-8 · 6201 243 · 6201 243 · NAS1611-236 · +1 more
  15. O-RING NSN 5331-00-255-3411 P/N ST1000-124 · ST1000-124 · ST1000-124 · ST1000-124 · +1 more
  16. O-RING NSN 5331-00-253-4846 P/N S9412-009 · S9412-009 · S9412-009 · S9005E9 · +1 more
  17. O-RING NSN 5331-00-252-6045 P/N MS29513-442 · MILP5315 · MS29513-442 · MS29513-442 · +1 more
  18. O-RING NSN 5331-00-250-9614 P/N 32Z9004100-2340 · 9004100-2340 · 9004100-2340 · 900-4100-2340 · +1 more
  19. O-RING NSN 5331-00-250-1229 P/N AS3570-272 · AN123932 · 5330002501229 · AS3570-272 · +1 more
  20. O-RING NSN 5331-00-250-1222 P/N AS3570-229 · AN123889 · AN123889 · AS3570-229 · +1 more
  21. O-RING NSN 5331-00-250-1216 P/N AN123865 · 2-112N180-70 · NO180 2-112 · AN123865 · +1 more
  22. O-RING NSN 5331-00-249-2259 P/N ASTM D2000 M2FK608A19E36F19Z · AS568-024 · 2-024C0MPL449-6 · 2-024L449-65 · +1 more
  23. O-RING NSN 5331-00-247-5972 P/N AS568-318 · ASTM D200 M3CH810A25EO16Z1 · 2-318N951-75 · AS568-318 · +1 more
  24. O-RING NSN 5331-00-247-5654 P/N AS3570-246 · AN123906 · 2-246 N180-70 · AS3570-246 · +1 more

Ranked by how many manufacturer cross-references are on file. Every item is quote-only — the federal record carries no price and no stock, and Atlas publishes neither. Browsing stops at page 500 of this class — past that, search by number. Send a whole list →

Questions about O-Ring

What does federal supply class 5331 cover?

Federal supply class 5331 covers O-rings, the round-section sealing rings used in grooves to seal fluid and gas connections. Every item filed here is an O-ring.

How is a part in federal supply class 5331 identified?

Because every item in the class has the same item name, the NSN is what tells one O-ring from another. Each NSN record carries the characteristics on file for that exact ring and the part numbers cross-referenced to it, so a buyer can work from an MS or AS number, a manufacturer number, or a drawing callout. Each item in the class has its own National Stock Number (NSN) record, listed above.

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