Skip to content

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.

5331-01-540-4486 (7T0565-163)

NIIN: 01-540-4486
In stock
NSN: 5331-01-540-4486
FSC Code: 5331
MPN: 7T0565163

5331-01-540-8269 (7T0565-234)

NIIN: 01-540-8269
In stock
NSN: 5331-01-540-8269
FSC Code: 5331
MPN: 7T0565234

5331-01-540-0687 (7T0565-138)

NIIN: 01-540-0687
In stock
NSN: 5331-01-540-0687
FSC Code: 5331
MPN: 7T0565138

5331-01-540-0692 (7T0565-141)

NIIN: 01-540-0692
In stock
NSN: 5331-01-540-0692
FSC Code: 5331
MPN: 7T0565141

5331-01-540-4488 (7T0565-121)

NIIN: 01-540-4488
In stock
NSN: 5331-01-540-4488
FSC Code: 5331
MPN: 7T0565121

5331-01-540-1791 (7T0565-130)

NIIN: 01-540-1791
In stock
NSN: 5331-01-540-1791
FSC Code: 5331
MPN: 7T0565130

5331-01-540-4489 (7T0565-115)

NIIN: 01-540-4489
In stock
NSN: 5331-01-540-4489
FSC Code: 5331
MPN: 7T0565115

5331-01-387-6907 (7T0188)

NIIN: 01-387-6907
In stock
NSN: 5331-01-387-6907
FSC Code: 5331
MPN: 7T0188

5331-01-474-1532 (7R-4530)

NIIN: 01-474-1532
In stock
NSN: 5331-01-474-1532
FSC Code: 5331
MPN: 7R4530

5331-01-473-5780 (7R6467)

NIIN: 01-473-5780
In stock
NSN: 5331-01-473-5780
FSC Code: 5331
MPN: 7R6467

5331-01-370-7706 (7Q072019)

NIIN: 01-370-7706
In stock
NSN: 5331-01-370-7706
FSC Code: 5331
MPN: 7Q072019

5331-01-371-2039 (7Q072020)

NIIN: 01-371-2039
In stock
NSN: 5331-01-371-2039
FSC Code: 5331
MPN: 7Q072020

5331-01-370-7707 (7Q072215)

NIIN: 01-370-7707
In stock
NSN: 5331-01-370-7707
FSC Code: 5331
MPN: 7Q072215

5331-01-372-9380 (7Q10P018)

NIIN: 01-372-9380
In stock
NSN: 5331-01-372-9380
FSC Code: 5331
MPN: 7Q10P018

5331-01-532-5733 (7R-0042)

NIIN: 01-532-5733
In stock
NSN: 5331-01-532-5733
FSC Code: 5331
MPN: 7R0042

5331-01-370-7708 (7Q073912)

NIIN: 01-370-7708
In stock
NSN: 5331-01-370-7708
FSC Code: 5331
MPN: 7Q073912

5331-01-371-2040 (7Q072016)

NIIN: 01-371-2040
In stock
NSN: 5331-01-371-2040
FSC Code: 5331
MPN: 7Q072016

5331-01-371-2038 (7Q072021)

NIIN: 01-371-2038
In stock
NSN: 5331-01-371-2038
FSC Code: 5331
MPN: 7Q072021

5331-01-560-7608 (7MM)

NIIN: 01-560-7608
In stock
NSN: 5331-01-560-7608
FSC Code: 5331
MPN: 7MM

5331-01-454-6213 (7M57(196))

NIIN: 01-454-6213
In stock
NSN: 5331-01-454-6213
FSC Code: 5331
MPN: 7M57196

5331-01-469-8242 (7M)

NIIN: 01-469-8242
In stock
NSN: 5331-01-469-8242
FSC Code: 5331
MPN: 7M

5331-01-527-1598 (7KK590)

NIIN: 01-527-1598
In stock
NSN: 5331-01-527-1598
FSC Code: 5331
MPN: 7KK590

5331-01-353-3476 (7L4773)

NIIN: 01-353-3476
In stock
NSN: 5331-01-353-3476
FSC Code: 5331
MPN: 7L4773

5331-01-511-4051 (7L2297)

NIIN: 01-511-4051
In stock
NSN: 5331-01-511-4051
FSC Code: 5331
MPN: 7L2297

5331-01-558-3716 (7KP688)

NIIN: 01-558-3716
In stock
NSN: 5331-01-558-3716
FSC Code: 5331
MPN: 7KP688

5331-01-376-6651 (7J-9933)

NIIN: 01-376-6651
In stock
NSN: 5331-01-376-6651
FSC Code: 5331
MPN: 7J9933

5331-01-424-1827 (7J-8956)

NIIN: 01-424-1827
In stock
NSN: 5331-01-424-1827
FSC Code: 5331
MPN: 7J8956

5331-01-370-7705 (7J-6285)

NIIN: 01-370-7705
In stock
NSN: 5331-01-370-7705
FSC Code: 5331
MPN: 7J6285

5331-01-531-5254 (7J1907)

NIIN: 01-531-5254
In stock
NSN: 5331-01-531-5254
FSC Code: 5331
MPN: 7J1907

5331-01-375-3086 (7HA364)

NIIN: 01-375-3086
In stock
NSN: 5331-01-375-3086
FSC Code: 5331
MPN: 7HA364

5331-01-515-0947 (7HB502A)

NIIN: 01-515-0947
In stock
NSN: 5331-01-515-0947
FSC Code: 5331
MPN: 7HB502A

5331-01-444-3079 (7HB502)

NIIN: 01-444-3079
In stock
NSN: 5331-01-444-3079
FSC Code: 5331
MPN: 7HB502

5331-01-479-2039 (7HB433)

NIIN: 01-479-2039
In stock
NSN: 5331-01-479-2039
FSC Code: 5331
MPN: 7HB433

5331-01-459-5254 (XA-2265)

NIIN: 01-459-5254
In stock
NSN: 5331-01-459-5254
FSC Code: 5331
MPN: XA2265

5331-01-375-3087 (Y00023223)

NIIN: 01-375-3087
In stock
NSN: 5331-01-375-3087
FSC Code: 5331
MPN: Y00023223

5331-01-351-5126 (7L-6580)

NIIN: 01-351-5126
In stock
NSN: 5331-01-351-5126
FSC Code: 5331
MPN: 7L6580

5331-01-466-5135 (7HA362)

NIIN: 01-466-5135
In stock
NSN: 5331-01-466-5135
FSC Code: 5331
MPN: 7HA362

5331-01-505-3732 (7G9404)

NIIN: 01-505-3732
In stock
NSN: 5331-01-505-3732
FSC Code: 5331
MPN: 7G9404

5331-01-450-2453 (7DE150FB)

NIIN: 01-450-2453
In stock
NSN: 5331-01-450-2453
FSC Code: 5331
MPN: 7DE150FB

5331-01-377-2759 (7D7519)

NIIN: 01-377-2759
In stock
NSN: 5331-01-377-2759
FSC Code: 5331
MPN: 7D7519

5331-01-557-4643 (7D9014)

NIIN: 01-557-4643
In stock
NSN: 5331-01-557-4643
FSC Code: 5331
MPN: 7D9014

5331-01-450-2455 (7DE150CX)

NIIN: 01-450-2455
In stock
NSN: 5331-01-450-2455
FSC Code: 5331
MPN: 7DE150CX

5331-01-543-6186 (7D8048)

NIIN: 01-543-6186
In stock
NSN: 5331-01-543-6186
FSC Code: 5331
MPN: 7D8048

5331-01-422-6572 (7D0265-905)

NIIN: 01-422-6572
In stock
NSN: 5331-01-422-6572
FSC Code: 5331
MPN: 7D0265905

5331-01-422-6571 (7D0265-903)

NIIN: 01-422-6571
In stock
NSN: 5331-01-422-6571
FSC Code: 5331
MPN: 7D0265903

5331-01-474-2188 (7C-6155)

NIIN: 01-474-2188
In stock
NSN: 5331-01-474-2188
FSC Code: 5331
MPN: 7C6155

5331-01-437-0557 (7B-105-01)

NIIN: 01-437-0557
In stock
NSN: 5331-01-437-0557
FSC Code: 5331
MPN: 7B10501

5331-01-412-9854 (79K8)

NIIN: 01-412-9854
In stock
NSN: 5331-01-412-9854
FSC Code: 5331
MPN: 79K8