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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.

5331-01-371-0827 (72-50F)

NIIN: 01-371-0827
In stock
NSN: 5331-01-371-0827
FSC Code: 5331
MPN: 7250F

5331-01-123-2832 (FD76A)

NIIN: 01-123-2832
In stock
NSN: 5331-01-123-2832
FSC Code: 5331
MPN: FD76A

5331-01-412-5442 (7250019-066)

NIIN: 01-412-5442
In stock
NSN: 5331-01-412-5442
FSC Code: 5331
MPN: 7250019066

5331-01-412-5438 (7250019-069)

NIIN: 01-412-5438
In stock
NSN: 5331-01-412-5438
FSC Code: 5331
MPN: 7250019069

5331-01-417-0030 (7-2479-01-457)

NIIN: 01-417-0030
In stock
NSN: 5331-01-417-0030
FSC Code: 5331
MPN: 7247901457

5331-01-079-6513 (FC030027)

NIIN: 01-079-6513
In stock
NSN: 5331-01-079-6513
FSC Code: 5331
MPN: FC030027

5331-01-266-3282 (FC014266000)

NIIN: 01-266-3282
In stock
NSN: 5331-01-266-3282
FSC Code: 5331
MPN: FC014266000

5331-01-271-9374 (FC030028)

NIIN: 01-271-9374
In stock
NSN: 5331-01-271-9374
FSC Code: 5331
MPN: FC030028

5331-01-271-9373 (FC030027)

NIIN: 01-271-9373
In stock
NSN: 5331-01-271-9373
FSC Code: 5331
MPN: FC030027

5331-01-271-9372 (FC030020)

NIIN: 01-271-9372
In stock
NSN: 5331-01-271-9372
FSC Code: 5331
MPN: FC030020

5331-01-271-9371 (FC030021)

NIIN: 01-271-9371
In stock
NSN: 5331-01-271-9371
FSC Code: 5331
MPN: FC030021

5331-01-434-4818 (72442-0)

NIIN: 01-434-4818
In stock
NSN: 5331-01-434-4818
FSC Code: 5331
MPN: 724420

5331-01-266-3281 (FC006019000)

NIIN: 01-266-3281
In stock
NSN: 5331-01-266-3281
FSC Code: 5331
MPN: FC006019000

5331-01-362-4326 (72-40F2IN-22)

NIIN: 01-362-4326
In stock
NSN: 5331-01-362-4326
FSC Code: 5331
MPN: 7240F2IN22

5331-01-176-7939 (FB167143)

NIIN: 01-176-7939
In stock
NSN: 5331-01-176-7939
FSC Code: 5331
MPN: FB167143

5331-01-529-4248 (7236-1.0INCHPC24)

NIIN: 01-529-4248
In stock
NSN: 5331-01-529-4248
FSC Code: 5331
MPN: 723610INCHPC24

5331-01-381-3764 (7236-1.0INCHPC24)

NIIN: 01-381-3764
In stock
NSN: 5331-01-381-3764
FSC Code: 5331
MPN: 723610INCHPC24

5331-01-176-7940 (FA-167101)

NIIN: 01-176-7940
In stock
NSN: 5331-01-176-7940
FSC Code: 5331
MPN: FA167101

5331-01-407-7123 (7233FRL972-5708)

NIIN: 01-407-7123
In stock
NSN: 5331-01-407-7123
FSC Code: 5331
MPN: 7233FRL9725708

5331-01-277-8808 (FA00117)

NIIN: 01-277-8808
In stock
NSN: 5331-01-277-8808
FSC Code: 5331
MPN: FA00117

5331-01-277-8807 (FA00017)

NIIN: 01-277-8807
In stock
NSN: 5331-01-277-8807
FSC Code: 5331
MPN: FA00017

5331-01-277-8809 (FA00110)

NIIN: 01-277-8809
In stock
NSN: 5331-01-277-8809
FSC Code: 5331
MPN: FA00110

5331-01-242-0695 (FA00210)

NIIN: 01-242-0695
In stock
NSN: 5331-01-242-0695
FSC Code: 5331
MPN: FA00210

5331-01-539-6397 (722A8MS-772-9173)

NIIN: 01-539-6397
In stock
NSN: 5331-01-539-6397
FSC Code: 5331
MPN: 722A8MS7729173

5331-01-448-0523 (B398214-74)

NIIN: 01-448-0523
In stock
NSN: 5331-01-448-0523
FSC Code: 5331
MPN: B39821474

5331-01-542-4223 (72277-1-04-24)

NIIN: 01-542-4223
In stock
NSN: 5331-01-542-4223
FSC Code: 5331
MPN: 7227710424

5331-01-038-0385 (F8211-2-5A)

NIIN: 01-038-0385
In stock
NSN: 5331-01-038-0385
FSC Code: 5331
MPN: F821125A

5331-01-350-0459 (72-2142-001)

NIIN: 01-350-0459
In stock
NSN: 5331-01-350-0459
FSC Code: 5331
MPN: 722142001

5331-01-332-4081 (F-818-B)

NIIN: 01-332-4081
In stock
NSN: 5331-01-332-4081
FSC Code: 5331
MPN: F818B

5331-01-440-2196 (7221-285A)

NIIN: 01-440-2196
In stock
NSN: 5331-01-440-2196
FSC Code: 5331
MPN: 7221285A

5331-01-277-2189 (F-81-3-8IN)

NIIN: 01-277-2189
In stock
NSN: 5331-01-277-2189
FSC Code: 5331
MPN: F8138IN

5331-01-379-0736 (961891-02)

NIIN: 01-379-0736
In stock
NSN: 5331-01-379-0736
FSC Code: 5331
MPN: 96189102

5331-00-251-4237 (F73125-258)

NIIN: 00-251-4237
In stock
NSN: 5331-00-251-4237
FSC Code: 5331
MPN: F73125258

5331-01-539-6374 (721G8FS-777-P2)

NIIN: 01-539-6374
In stock
NSN: 5331-01-539-6374
FSC Code: 5331
MPN: 721G8FS777P2

5331-01-362-5045 (721-7069909-40)

NIIN: 01-362-5045
In stock
NSN: 5331-01-362-5045
FSC Code: 5331
MPN: 721706990940

5331-01-389-8782 (7213FT-972-4780)

NIIN: 01-389-8782
In stock
NSN: 5331-01-389-8782
FSC Code: 5331
MPN: 7213FT9724780

5331-01-466-0625 (AS568A-132-70FS)

NIIN: 01-466-0625
In stock
NSN: 5331-01-466-0625
FSC Code: 5331
MPN: AS568A13270FS

5331-01-465-1817 (721-30-B5-G2)

NIIN: 01-465-1817
In stock
NSN: 5331-01-465-1817
FSC Code: 5331
MPN: 72130B5G2

5331-00-082-1120 (F6543PC563)

NIIN: 00-082-1120
In stock
NSN: 5331-00-082-1120
FSC Code: 5331
MPN: F6543PC563

5331-01-290-7412 (F-637-31-3IN)

NIIN: 01-290-7412
In stock
NSN: 5331-01-290-7412
FSC Code: 5331
MPN: F637313IN

5331-01-281-0532 (F63931-MG)

NIIN: 01-281-0532
In stock
NSN: 5331-01-281-0532
FSC Code: 5331
MPN: F63931MG

5331-01-282-0750 (F637-31-2IN-13PACKING)

NIIN: 01-282-0750
In stock
NSN: 5331-01-282-0750
FSC Code: 5331
MPN: F637312IN13PACKING

5331-01-285-9338 (F593G001-17)

NIIN: 01-285-9338
In stock
NSN: 5331-01-285-9338
FSC Code: 5331
MPN: F593G00117

5331-01-295-5671 (F5557)

NIIN: 01-295-5671
In stock
NSN: 5331-01-295-5671
FSC Code: 5331
MPN: F5557

5331-01-295-5672 (F5561)

NIIN: 01-295-5672
In stock
NSN: 5331-01-295-5672
FSC Code: 5331
MPN: F5561

5331-01-313-5689 (F56E)

NIIN: 01-313-5689
In stock
NSN: 5331-01-313-5689
FSC Code: 5331
MPN: F56E

5331-01-308-5850 (F-55279-1)

NIIN: 01-308-5850
In stock
NSN: 5331-01-308-5850
FSC Code: 5331
MPN: F552791

5331-00-998-3468 (F5169271-1)

NIIN: 00-998-3468
In stock
NSN: 5331-00-998-3468
FSC Code: 5331
MPN: F51692711