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O-Rings

FSC 5331: O-Rings

Federal Supply Class (FSC) 5331 covers O-rings, the round-section elastomeric seals used to seal static and dynamic joints. The catalog includes O-rings built to AS568, MIL-SPEC, and industry standards.

O-rings seal connections in hydraulic, pneumatic, fuel, and fluid systems by compressing in a groove. They are among the most widely used sealing elements in machinery.

Common materials include nitrile (Buna-N), fluorocarbon (Viton), silicone, EPDM, and PTFE, selected for fluid compatibility and temperature range. Sizes follow standard dash-number series for repeatable replacement.

5331-01-383-3942 (2-161E962-90)

NIIN: 01-383-3942
In stock
NSN: 5331-01-383-3942
FSC Code: 5331
MPN: 2161E96290

5331-01-439-4574 (216-19359)

NIIN: 01-439-4574
In stock
NSN: 5331-01-439-4574
FSC Code: 5331
MPN: 21619359

5331-00-720-2135 (597-515-1884386REVAPC18)

NIIN: 00-720-2135
In stock
NSN: 5331-00-720-2135
FSC Code: 5331
MPN: 5975151884386REVAPC18

5331-00-684-2550 (597-203-1884734REVAPC40)

NIIN: 00-684-2550
In stock
NSN: 5331-00-684-2550
FSC Code: 5331
MPN: 5972031884734REVAPC40

5331-01-525-9928 (2-161)

NIIN: 01-525-9928
In stock
NSN: 5331-01-525-9928
FSC Code: 5331
MPN: 2161

5331-01-504-2778 (2-160L1223-60)

NIIN: 01-504-2778
In stock
NSN: 5331-01-504-2778
FSC Code: 5331
MPN: 2160L122360

5331-01-526-7702 (2-159N0525-60)

NIIN: 01-526-7702
In stock
NSN: 5331-01-526-7702
FSC Code: 5331
MPN: 2159N052560

5331-01-460-1045 (2-159C1124-70)

NIIN: 01-460-1045
In stock
NSN: 5331-01-460-1045
FSC Code: 5331
MPN: 2159C112470

5331-01-537-2483 (2-159L1223-60)

NIIN: 01-537-2483
In stock
NSN: 5331-01-537-2483
FSC Code: 5331
MPN: 2159L122360

5331-01-529-0537 (S1224-2-159-70)

NIIN: 01-529-0537
In stock
NSN: 5331-01-529-0537
FSC Code: 5331
MPN: S1224215970

5331-01-385-1051 (2-158S469-40)

NIIN: 01-385-1051
In stock
NSN: 5331-01-385-1051
FSC Code: 5331
MPN: 2158S46940

5331-01-397-8174 (2-158L0946-60)

NIIN: 01-397-8174
In stock
NSN: 5331-01-397-8174
FSC Code: 5331
MPN: 2158L094660

5331-01-481-8498 (ORAR00215-N9038)

NIIN: 01-481-8498
In stock
NSN: 5331-01-481-8498
FSC Code: 5331
MPN: ORAR00215N9038

5331-01-407-7754 (2-157V747-75)

NIIN: 01-407-7754
In stock
NSN: 5331-01-407-7754
FSC Code: 5331
MPN: 2157V74775

5331-01-441-5738 (AS568-157AMS3212)

NIIN: 01-441-5738
In stock
NSN: 5331-01-441-5738
FSC Code: 5331
MPN: AS568157AMS3212

5331-01-359-4546 (21574GE)

NIIN: 01-359-4546
In stock
NSN: 5331-01-359-4546
FSC Code: 5331
MPN: 21574GE

5331-01-542-9917 (2-156N304-7)

NIIN: 01-542-9917
In stock
NSN: 5331-01-542-9917
FSC Code: 5331
MPN: 2156N3047

5331-01-499-3590 (2-157)

NIIN: 01-499-3590
In stock
NSN: 5331-01-499-3590
FSC Code: 5331
MPN: 2157

5331-01-372-3056 (2-156C873-70)

NIIN: 01-372-3056
In stock
NSN: 5331-01-372-3056
FSC Code: 5331
MPN: 2156C87370

5331-01-460-1054 (2-156C1124-70)

NIIN: 01-460-1054
In stock
NSN: 5331-01-460-1054
FSC Code: 5331
MPN: 2156C112470

5331-01-361-1457 (2-155-NBR)

NIIN: 01-361-1457
In stock
NSN: 5331-01-361-1457
FSC Code: 5331
MPN: 2155NBR

5331-01-453-1831 (2-155V884-75)

NIIN: 01-453-1831
In stock
NSN: 5331-01-453-1831
FSC Code: 5331
MPN: 2155V88475

5331-01-502-2947 (AMS-R-83485/1)

NIIN: 01-502-2947
In stock
NSN: 5331-01-502-2947
FSC Code: 5331
MPN: AMSR834851

5331-01-382-0121 (2-154N525-60)

NIIN: 01-382-0121
In stock
NSN: 5331-01-382-0121
FSC Code: 5331
MPN: 2154N52560

5331-01-519-3566 (215-4642224ITEM1-26(MOD))

NIIN: 01-519-3566
In stock
NSN: 5331-01-519-3566
FSC Code: 5331
MPN: 2154642224ITEM126MOD

5331-01-358-1023 (215-4200-70)

NIIN: 01-358-1023
In stock
NSN: 5331-01-358-1023
FSC Code: 5331
MPN: 215420070

5331-01-398-8804 (21542963-1)

NIIN: 01-398-8804
In stock
NSN: 5331-01-398-8804
FSC Code: 5331
MPN: 215429631

5331-01-501-4296 (5331PL0658577)

NIIN: 01-501-4296
In stock
NSN: 5331-01-501-4296
FSC Code: 5331
MPN: 5331PL0658577

5331-01-435-9478 (2-152PS1-30-5)

NIIN: 01-435-9478
In stock
NSN: 5331-01-435-9478
FSC Code: 5331
MPN: 2152PS1305

5331-01-433-2072 (2-152-E0515-80)

NIIN: 01-433-2072
In stock
NSN: 5331-01-433-2072
FSC Code: 5331
MPN: 2152E051580

5331-01-496-7840 (2-152N497-70)

NIIN: 01-496-7840
In stock
NSN: 5331-01-496-7840
FSC Code: 5331
MPN: 2152N49770

5331-01-429-2398 (21522115-877)

NIIN: 01-429-2398
In stock
NSN: 5331-01-429-2398
FSC Code: 5331
MPN: 21522115877

5331-01-553-4313 (2-152-47-071)

NIIN: 01-553-4313
In stock
NSN: 5331-01-553-4313
FSC Code: 5331
MPN: 215247071

5331-01-379-8132 (2152-2115-712)

NIIN: 01-379-8132
In stock
NSN: 5331-01-379-8132
FSC Code: 5331
MPN: 21522115712

5331-01-433-9226 (54.5X3NBR90IRH)

NIIN: 01-433-9226
In stock
NSN: 5331-01-433-9226
FSC Code: 5331
MPN: 545X3NBR90IRH

5331-01-382-2598 (21522164-182)

NIIN: 01-382-2598
In stock
NSN: 5331-01-382-2598
FSC Code: 5331
MPN: 21522164182

5331-01-429-2399 (21522115-415)

NIIN: 01-429-2399
In stock
NSN: 5331-01-429-2399
FSC Code: 5331
MPN: 21522115415

5331-01-379-8293 (2152-2115-944)

NIIN: 01-379-8293
In stock
NSN: 5331-01-379-8293
FSC Code: 5331
MPN: 21522115944

5331-01-379-8448 (2152-2115-895)

NIIN: 01-379-8448
In stock
NSN: 5331-01-379-8448
FSC Code: 5331
MPN: 21522115895

5331-01-379-8296 (2152-2115-525)

NIIN: 01-379-8296
In stock
NSN: 5331-01-379-8296
FSC Code: 5331
MPN: 21522115525

5331-01-429-2397 (21522118-803)

NIIN: 01-429-2397
In stock
NSN: 5331-01-429-2397
FSC Code: 5331
MPN: 21522118803

5331-01-381-1652 (2-151A)

NIIN: 01-381-1652
In stock
NSN: 5331-01-381-1652
FSC Code: 5331
MPN: 2151A

5331-01-291-0544 (595-N8-5-01964-00)

NIIN: 01-291-0544
In stock
NSN: 5331-01-291-0544
FSC Code: 5331
MPN: 595N850196400

5331-01-164-9748 (5-955N674-70)

NIIN: 01-164-9748
In stock
NSN: 5331-01-164-9748
FSC Code: 5331
MPN: 5955N67470

5331-01-269-4976 (5-953-S899-50)

NIIN: 01-269-4976
In stock
NSN: 5331-01-269-4976
FSC Code: 5331
MPN: 5953S89950

5331-00-171-5193 (5-950N602-70)

NIIN: 00-171-5193
In stock
NSN: 5331-00-171-5193
FSC Code: 5331
MPN: 5950N60270

5331-01-028-3617 (595029-7)

NIIN: 01-028-3617
In stock
NSN: 5331-01-028-3617
FSC Code: 5331
MPN: 5950297

5331-01-033-5798 (595029-2)

NIIN: 01-033-5798
In stock
NSN: 5331-01-033-5798
FSC Code: 5331
MPN: 5950292