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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.

5331-01-036-7699 (3763-6)

NIIN: 01-036-7699
In stock
NSN: 5331-01-036-7699
FSC Code: 5331
MPN: 37636

5331-01-536-0918 (123-028-5)

NIIN: 01-536-0918
In stock
NSN: 5331-01-536-0918
FSC Code: 5331
MPN: 1230285

5331-01-536-1921 (123-030-5)

NIIN: 01-536-1921
In stock
NSN: 5331-01-536-1921
FSC Code: 5331
MPN: 1230305

5331-01-055-6929 (37621-376)

NIIN: 01-055-6929
In stock
NSN: 5331-01-055-6929
FSC Code: 5331
MPN: 37621376

5331-01-055-6931 (37621-001)

NIIN: 01-055-6931
In stock
NSN: 5331-01-055-6931
FSC Code: 5331
MPN: 37621001

5331-00-490-5027 (376-150-0001)

NIIN: 00-490-5027
In stock
NSN: 5331-00-490-5027
FSC Code: 5331
MPN: 3761500001

5331-00-957-7682 (376-111-0426)

NIIN: 00-957-7682
In stock
NSN: 5331-00-957-7682
FSC Code: 5331
MPN: 3761110426

5331-00-580-3939 (37610-131)

NIIN: 00-580-3939
In stock
NSN: 5331-00-580-3939
FSC Code: 5331
MPN: 37610131

5331-00-988-5829 (37604-021)

NIIN: 00-988-5829
In stock
NSN: 5331-00-988-5829
FSC Code: 5331
MPN: 37604021

5331-00-395-3213 (37603-012)

NIIN: 00-395-3213
In stock
NSN: 5331-00-395-3213
FSC Code: 5331
MPN: 37603012

5331-00-395-3214 (37603-339)

NIIN: 00-395-3214
In stock
NSN: 5331-00-395-3214
FSC Code: 5331
MPN: 37603339

5331-14-412-5535 (12300D00A3U61D8)

NIIN: 14-412-5535
In stock
NSN: 5331-14-412-5535
FSC Code: 5331
MPN: 12300D00A3U61D8

5331-00-406-0830 (375G031QTA)

NIIN: 00-406-0830
In stock
NSN: 5331-00-406-0830
FSC Code: 5331
MPN: 375G031QTA

5331-01-084-4749 (375B116QTA)

NIIN: 01-084-4749
In stock
NSN: 5331-01-084-4749
FSC Code: 5331
MPN: 375B116QTA

5331-01-142-1325 (375-B-908-QTA)

NIIN: 01-142-1325
In stock
NSN: 5331-01-142-1325
FSC Code: 5331
MPN: 375B908QTA

5331-01-142-3508 (375-B-905SUA)

NIIN: 01-142-3508
In stock
NSN: 5331-01-142-3508
FSC Code: 5331
MPN: 375B905SUA

5331-01-336-8775 (375B219QMA)

NIIN: 01-336-8775
In stock
NSN: 5331-01-336-8775
FSC Code: 5331
MPN: 375B219QMA

5331-01-101-0595 (375B217SUA)

NIIN: 01-101-0595
In stock
NSN: 5331-01-101-0595
FSC Code: 5331
MPN: 375B217SUA

5331-01-119-4934 (375B218SUA)

NIIN: 01-119-4934
In stock
NSN: 5331-01-119-4934
FSC Code: 5331
MPN: 375B218SUA

5331-01-142-3507 (375B010QMA)

NIIN: 01-142-3507
In stock
NSN: 5331-01-142-3507
FSC Code: 5331
MPN: 375B010QMA

5331-01-252-0471 (375-B-143QTA)

NIIN: 01-252-0471
In stock
NSN: 5331-01-252-0471
FSC Code: 5331
MPN: 375B143QTA

5331-01-255-8858 (375B212QMA)

NIIN: 01-255-8858
In stock
NSN: 5331-01-255-8858
FSC Code: 5331
MPN: 375B212QMA

5331-01-223-6764 (375B)

NIIN: 01-223-6764
In stock
NSN: 5331-01-223-6764
FSC Code: 5331
MPN: 375B

5331-01-231-0692 (375B009QTA)

NIIN: 01-231-0692
In stock
NSN: 5331-01-231-0692
FSC Code: 5331
MPN: 375B009QTA

5331-00-136-5077 (3754-5)

NIIN: 00-136-5077
In stock
NSN: 5331-00-136-5077
FSC Code: 5331
MPN: 37545

5331-01-151-5068 (375411-01-1)

NIIN: 01-151-5068
In stock
NSN: 5331-01-151-5068
FSC Code: 5331
MPN: 375411011

5331-00-136-5076 (3754-4)

NIIN: 00-136-5076
In stock
NSN: 5331-00-136-5076
FSC Code: 5331
MPN: 37544

5331-01-569-1307 (122-9250)

NIIN: 01-569-1307
In stock
NSN: 5331-01-569-1307
FSC Code: 5331
MPN: 1229250

5331-01-281-6433 (375-10A)

NIIN: 01-281-6433
In stock
NSN: 5331-01-281-6433
FSC Code: 5331
MPN: 37510A

5331-00-052-0537 (375098ES)

NIIN: 00-052-0537
In stock
NSN: 5331-00-052-0537
FSC Code: 5331
MPN: 375098ES

5331-01-094-5996 (37503-30)

NIIN: 01-094-5996
In stock
NSN: 5331-01-094-5996
FSC Code: 5331
MPN: 3750330

5331-01-255-2574 (37504000-625)

NIIN: 01-255-2574
In stock
NSN: 5331-01-255-2574
FSC Code: 5331
MPN: 37504000625

5331-01-372-2569 (12282157-36)

NIIN: 01-372-2569
In stock
NSN: 5331-01-372-2569
FSC Code: 5331
MPN: 1228215736

5331-00-883-0541 (3-7-47-071)

NIIN: 00-883-0541
In stock
NSN: 5331-00-883-0541
FSC Code: 5331
MPN: 3747071

5331-00-853-4301 (373471S)

NIIN: 00-853-4301
In stock
NSN: 5331-00-853-4301
FSC Code: 5331
MPN: 373471S

5331-00-490-1891 (373524S)

NIIN: 00-490-1891
In stock
NSN: 5331-00-490-1891
FSC Code: 5331
MPN: 373524S

5331-00-234-8769 (373326-17)

NIIN: 00-234-8769
In stock
NSN: 5331-00-234-8769
FSC Code: 5331
MPN: 37332617

5331-00-826-7249 (373326-15)

NIIN: 00-826-7249
In stock
NSN: 5331-00-826-7249
FSC Code: 5331
MPN: 37332615

5331-00-720-3195 (373262-1)

NIIN: 00-720-3195
In stock
NSN: 5331-00-720-3195
FSC Code: 5331
MPN: 3732621

5331-00-826-7248 (373326-13)

NIIN: 00-826-7248
In stock
NSN: 5331-00-826-7248
FSC Code: 5331
MPN: 37332613

5331-01-313-7873 (373022-04-2)

NIIN: 01-313-7873
In stock
NSN: 5331-01-313-7873
FSC Code: 5331
MPN: 373022042

5331-01-313-7874 (373022-07-7)

NIIN: 01-313-7874
In stock
NSN: 5331-01-313-7874
FSC Code: 5331
MPN: 373022077

5331-01-479-2595 (12-24-1822)

NIIN: 01-479-2595
In stock
NSN: 5331-01-479-2595
FSC Code: 5331
MPN: 12241822

5331-00-853-4296 (372219S94)

NIIN: 00-853-4296
In stock
NSN: 5331-00-853-4296
FSC Code: 5331
MPN: 372219S94

5331-01-373-5232 (SA-1248-C)

NIIN: 01-373-5232
In stock
NSN: 5331-01-373-5232
FSC Code: 5331
MPN: SA1248C

5331-01-371-5126 (SA-1247-C)

NIIN: 01-371-5126
In stock
NSN: 5331-01-371-5126
FSC Code: 5331
MPN: SA1247C

5331-01-373-0588 (SA-1273-C)

NIIN: 01-373-0588
In stock
NSN: 5331-01-373-0588
FSC Code: 5331
MPN: SA1273C

5331-01-479-2591 (12-23-1822)

NIIN: 01-479-2591
In stock
NSN: 5331-01-479-2591
FSC Code: 5331
MPN: 12231822