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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 5331-00-285-9775 P/N PRP252AMS7270 · PRP568-252-4200-70 · AS568-252AMS7270 · AS3569-252 · +9 more
  2. O-RING NSN 5331-00-279-4328 P/N 287-6008P104 · 287-6008P104 · MILR25988 · MIL-DTL-25988/1 · +9 more
  3. O-RING NSN 5331-00-253-4844 P/N S8057AP6 · S9412-011 · S8057AP6 · MIL-DTL-25988/2 · +9 more
  4. O-RING NSN 5331-00-242-6628 P/N 6700419 · 9121274 · 9121274 · 6700419 · +9 more
  5. O-RING NSN 5331-00-232-0632 P/N 426-11646 · PRP426-11646 · PRP568-426-1133-60 · B63115-426 · +9 more
  6. O-RING NSN 5331-00-231-1464 P/N S9515-AL-MMA-010,7-52 ITEM 5 · S9515-AL-MMA-010,7-56 ITEM 4 · NV822201 FIND 89 · 3P031030D3 · +9 more
  7. O-RING NSN 5331-00-225-9034 P/N 018-11646 · PRP018-11646 · B63115-18 · PRP568-018-1133-60 · +9 more
  8. O-RING NSN 5331-00-222-1709 P/N PRP011-11737 · 011-11737 · MS9386-011 · AS568-011AMS7267 · +9 more
  9. O-RING NSN 5331-00-197-9606 P/N PR4202-1PC21 · PR4301-1PC21 · PR4201-1PC21 · N91-81639 · +9 more
  10. O-RING NSN 5331-00-196-5361 P/N 117045 · 287-1004P76 · AN6227B76 · AN6227-76 · +9 more
  11. O-RING NSN 5331-00-182-3115 P/N 1115-0300-23 · AS3582-023 · AS568-023AMS3304 · 2-023S604-70 · +9 more
  12. O-RING NSN 5331-00-180-9566 P/N 014-11737 · PRP014-11737 · AS568-014AMS7267 · MS9386-014 · +9 more
  13. O-RING NSN 5331-00-167-5164 P/N 6962398-31 · 845-820-12 ITEM 16 · AS3209-451 · ABS7262 · +9 more
  14. O-RING NSN 5331-00-167-5155 P/N 649-393-280-0 · J221P280 · AS3209-280 · M83248/1-280 · +9 more
  15. O-RING NSN 5331-00-156-2966 P/N 22-69058 ITEM 11 · 4-222154 · 4-222154 · B 2575.146.678 · +9 more
  16. O-RING NSN 5331-00-136-5642 P/N 2507294-18 · 2-029 BUNA-N · 2507294-18 · AS568-029NBR · +9 more
  17. O-RING NSN 5331-00-135-7227 P/N AS3582-029 · AMS 3304 · AS3582-029 · 5331PL2168235 · +9 more
  18. O-RING NSN 5331-00-128-2074 P/N A-1633-39 · AS568-239B46A · 2-239 N674-70 · 42.91 · +9 more
  19. O-RING NSN 5331-00-123-2829 P/N MS9385-05 · MS9385-05 · MS9385-05 · S8990-581 · +9 more
  20. O-RING NSN 5331-00-075-3221 P/N 19711 · 398033-013 · 651456 · AS568-117 ZZ-R-765 CL2B-70 · +9 more
  21. O-RING NSN 5331-00-068-2500 P/N AS3582-220 · 2-220-S604-70 · MS9068-220 · 5331000682500 · +9 more
  22. O-RING NSN 5331-00-066-2413 P/N S8057R7 · S8057R7 · AS3582-012 · MS9068-012 · +9 more
  23. O-RING NSN 5331-00-057-2029 P/N 0XN90-81606 · 2621-906-19 PIECE 20 · 58-011-15 · MS28775-011 CP · +9 more
  24. O-RING NSN 5331-00-020-7106 P/N ASTM-D2000 · AS568B · AS568-010 3CH915B34EO16EO36 · MIL-STD-413C · +9 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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