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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 5331-01-398-4995 P/N AS9955-023 · MS9955-023 · MS9955-023 · AS9955-023 · +2 more
  2. O-RING NSN 5331-01-397-3436 P/N MIL-P-83461/1-427 · MIL-P-83461/1-427 · M83461/1-427 · MIL-P-83461/1-427 · +2 more
  3. O-RING NSN 5331-01-396-7233 P/N ST7M258H466 · 600-466 · STM258-466 · ST7M258H466 · +2 more
  4. O-RING NSN 5331-01-396-0470 P/N R37287 · 276A · R37287 · R37287 · +2 more
  5. O-RING NSN 5331-01-395-3022 P/N AS3209-130 · AMS7276 BROWN ONLY · MIL-R-83248 · M83248/1-130 BROWN ONLY · +2 more
  6. O-RING NSN 5331-01-393-9441 P/N KIT8.3X2.4MM N90 · 4HS741 · 4HS741 · 960159 · +2 more
  7. O-RING NSN 5331-01-391-9843 P/N JL-77-172-2-6 · G476650-6 · G476650-6 · 2-259B1167-80 · +2 more
  8. O-RING NSN 5331-01-390-2905 P/N H45112-3-2452 · H45112-3-2452-F 03 · H45112-3-2452 · H45112-3-2452 · +2 more
  9. PACKING,FOLLOWER NSN 5331-01-390-2901 P/N H47857 · H47857 · H47857 · H47857-A01 · +2 more
  10. O-RING NSN 5331-01-390-0617 P/N AMS-P-83461 · M83461/1-239 · MIL-P-83461 · M83461/1-239 · +2 more
  11. O-RING NSN 5331-01-389-1486 P/N 918736 · NAS1611-377A · NAS1613 · NAS1601-377 · +2 more
  12. O-RING NSN 5331-01-389-0060 P/N 95022307 · 20A11EM231 · 95022307 · 5331PL1284827 · +2 more
  13. O-RING NSN 5331-01-386-9823 P/N 3423-5001-1 ITEM 19 · 3423-1001-1 ITEM 25 · 1000-0060-20 · 1000-0060-20CP · +2 more
  14. O-RING NSN 5331-01-386-1416 P/N 1269-60 · A-238 MG · 71306463 · 0R2-238-9251 · +2 more
  15. O-RING NSN 5331-01-385-6400 P/N M83248/1-134 · 4400571-1340 · 283371-0003ITEM67 · 283371-0001ITEM67 · +2 more
  16. O-RING NSN 5331-01-385-3444 P/N AMS-R-83485/1 · M83485/1-907 · M83485/1-907 · AMS-R-83485/1 · +2 more
  17. O-RING NSN 5331-01-384-9520 P/N 5331PL0805748 · 5331PL2172520 · MS28778-2 · A000282951000 · +2 more
  18. O-RING NSN 5331-01-384-3045 P/N 200991 · 10018618 · HMHRADQ · HMHRADQ · +2 more
  19. O-RING NSN 5331-01-384-3044 P/N HMHRABV · 200978 · HMHRABV · 10018633 · +2 more
  20. O-RING NSN 5331-01-383-2672 P/N M83461/1-202 · M83461/1-202 · MIL-P-83461/1-202 · AMS-P-83461/1 · +2 more
  21. O-RING NSN 5331-01-381-0071 P/N MS28775-213 · MS28775-213 · MS28775-213CP · MS28775-213CP · +2 more
  22. O-RING NSN 5331-01-379-9962 P/N RR1542M · 200145AA PIECE 11 · RR1542M · 200145AA PIECE 11 · +2 more
  23. O-RING NSN 5331-01-379-9293 P/N MIL-G-22050 · MIL-G-22050GRADE3SIZEAS568-228 · AF722-1948-000PC76A · 722-2021-000PC76A · +2 more
  24. O-RING NSN 5331-01-379-9290 P/N MIL-G-22050 · MIL-G-22050GRADE3SIZEAS568-226 · AF722-1948-000PC75A · 722-2021-000PC75A · +2 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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