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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.

5331-01-294-4231 (5-26736)

NIIN: 01-294-4231
In stock
NSN: 5331-01-294-4231
FSC Code: 5331
MPN: 526736

5331-00-409-3680 (5-264S604-70)

NIIN: 00-409-3680
In stock
NSN: 5331-00-409-3680
FSC Code: 5331
MPN: 5264S60470

5331-01-567-2857 (19744APC42)

NIIN: 01-567-2857
In stock
NSN: 5331-01-567-2857
FSC Code: 5331
MPN: 19744APC42

5331-01-567-2856 (19744APC41)

NIIN: 01-567-2856
In stock
NSN: 5331-01-567-2856
FSC Code: 5331
MPN: 19744APC41

5331-01-198-8093 (52574-1)

NIIN: 01-198-8093
In stock
NSN: 5331-01-198-8093
FSC Code: 5331
MPN: 525741

5331-01-137-6904 (525648-02)

NIIN: 01-137-6904
In stock
NSN: 5331-01-137-6904
FSC Code: 5331
MPN: 52564802

5331-01-312-7155 (52561B330)

NIIN: 01-312-7155
In stock
NSN: 5331-01-312-7155
FSC Code: 5331
MPN: 52561B330

5331-01-114-7977 (52561M212)

NIIN: 01-114-7977
In stock
NSN: 5331-01-114-7977
FSC Code: 5331
MPN: 52561M212

5331-01-200-0444 (52561S349)

NIIN: 01-200-0444
In stock
NSN: 5331-01-200-0444
FSC Code: 5331
MPN: 52561S349

5331-01-020-9262 (52561A437)

NIIN: 01-020-9262
In stock
NSN: 5331-01-020-9262
FSC Code: 5331
MPN: 52561A437

5331-01-114-3816 (52561M112)

NIIN: 01-114-3816
In stock
NSN: 5331-01-114-3816
FSC Code: 5331
MPN: 52561M112

5331-01-310-5190 (52561B118)

NIIN: 01-310-5190
In stock
NSN: 5331-01-310-5190
FSC Code: 5331
MPN: 52561B118

5331-01-200-0459 (52561A462)

NIIN: 01-200-0459
In stock
NSN: 5331-01-200-0459
FSC Code: 5331
MPN: 52561A462

5331-01-236-6211 (52561A342)

NIIN: 01-236-6211
In stock
NSN: 5331-01-236-6211
FSC Code: 5331
MPN: 52561A342

5331-01-080-9066 (52561A346)

NIIN: 01-080-9066
In stock
NSN: 5331-01-080-9066
FSC Code: 5331
MPN: 52561A346

5331-01-054-2371 (52561A346)

NIIN: 01-054-2371
In stock
NSN: 5331-01-054-2371
FSC Code: 5331
MPN: 52561A346

5331-01-101-2474 (52561A430)

NIIN: 01-101-2474
In stock
NSN: 5331-01-101-2474
FSC Code: 5331
MPN: 52561A430

5331-01-020-9260 (52561A349)

NIIN: 01-020-9260
In stock
NSN: 5331-01-020-9260
FSC Code: 5331
MPN: 52561A349

5331-01-310-3897 (52561A333)

NIIN: 01-310-3897
In stock
NSN: 5331-01-310-3897
FSC Code: 5331
MPN: 52561A333

5331-01-126-0865 (52561A112)

NIIN: 01-126-0865
In stock
NSN: 5331-01-126-0865
FSC Code: 5331
MPN: 52561A112

5331-01-310-3896 (52560A073)

NIIN: 01-310-3896
In stock
NSN: 5331-01-310-3896
FSC Code: 5331
MPN: 52560A073

5331-01-213-6764 (52561A211)

NIIN: 01-213-6764
In stock
NSN: 5331-01-213-6764
FSC Code: 5331
MPN: 52561A211

5331-01-309-3632 (52561A123)

NIIN: 01-309-3632
In stock
NSN: 5331-01-309-3632
FSC Code: 5331
MPN: 52561A123

5331-01-309-3631 (52561A118)

NIIN: 01-309-3631
In stock
NSN: 5331-01-309-3631
FSC Code: 5331
MPN: 52561A118

5331-01-287-2926 (52561A235)

NIIN: 01-287-2926
In stock
NSN: 5331-01-287-2926
FSC Code: 5331
MPN: 52561A235

5331-01-145-6896 (52560A250)

NIIN: 01-145-6896
In stock
NSN: 5331-01-145-6896
FSC Code: 5331
MPN: 52560A250

5331-01-131-9494 (52561A114)

NIIN: 01-131-9494
In stock
NSN: 5331-01-131-9494
FSC Code: 5331
MPN: 52561A114

5331-01-030-4926 (52-560-A073)

NIIN: 01-030-4926
In stock
NSN: 5331-01-030-4926
FSC Code: 5331
MPN: 52560A073

5331-01-151-8789 (5-256)

NIIN: 01-151-8789
In stock
NSN: 5331-01-151-8789
FSC Code: 5331
MPN: 5256

5331-01-291-7879 (5-256)

NIIN: 01-291-7879
In stock
NSN: 5331-01-291-7879
FSC Code: 5331
MPN: 5256

5331-01-451-5632 (196A588LFS)

NIIN: 01-451-5632
In stock
NSN: 5331-01-451-5632
FSC Code: 5331
MPN: 196A588LFS

5331-00-171-8117 (525-27)

NIIN: 00-171-8117
In stock
NSN: 5331-00-171-8117
FSC Code: 5331
MPN: 52527

5331-01-326-5784 (5-251N741-75)

NIIN: 01-326-5784
In stock
NSN: 5331-01-326-5784
FSC Code: 5331
MPN: 5251N74175

5331-00-150-4868 (5-252-77-545)

NIIN: 00-150-4868
In stock
NSN: 5331-00-150-4868
FSC Code: 5331
MPN: 525277545

5331-01-530-5611 (19-68117-214)

NIIN: 01-530-5611
In stock
NSN: 5331-01-530-5611
FSC Code: 5331
MPN: 1968117214

5331-01-530-5607 (19-68118-122)

NIIN: 01-530-5607
In stock
NSN: 5331-01-530-5607
FSC Code: 5331
MPN: 1968118122

5331-00-107-5331 (5-251N674-70)

NIIN: 00-107-5331
In stock
NSN: 5331-00-107-5331
FSC Code: 5331
MPN: 5251N67470

5331-01-436-5698 (19-68117-210)

NIIN: 01-436-5698
In stock
NSN: 5331-01-436-5698
FSC Code: 5331
MPN: 1968117210

5331-01-289-2642 (52507-01ITEM43)

NIIN: 01-289-2642
In stock
NSN: 5331-01-289-2642
FSC Code: 5331
MPN: 5250701ITEM43

5331-01-494-8086 (CGR1601-0125-7)

NIIN: 01-494-8086
In stock
NSN: 5331-01-494-8086
FSC Code: 5331
MPN: CGR160101257

5331-01-118-8807 (52500-172158)

NIIN: 01-118-8807
In stock
NSN: 5331-01-118-8807
FSC Code: 5331
MPN: 52500172158

5331-01-119-3467 (52500-172448)

NIIN: 01-119-3467
In stock
NSN: 5331-01-119-3467
FSC Code: 5331
MPN: 52500172448

5331-00-966-8692 (5245-8)

NIIN: 00-966-8692
In stock
NSN: 5331-00-966-8692
FSC Code: 5331
MPN: 52458

5331-00-966-8682 (5245-5)

NIIN: 00-966-8682
In stock
NSN: 5331-00-966-8682
FSC Code: 5331
MPN: 52455

5331-00-493-8042 (5245-12)

NIIN: 00-493-8042
In stock
NSN: 5331-00-493-8042
FSC Code: 5331
MPN: 524512

5331-00-618-0226 (5245-16)

NIIN: 00-618-0226
In stock
NSN: 5331-00-618-0226
FSC Code: 5331
MPN: 524516

5331-01-315-9277 (5-243N304-75)

NIIN: 01-315-9277
In stock
NSN: 5331-01-315-9277
FSC Code: 5331
MPN: 5243N30475

5331-01-353-3473 (KS-9261-2)

NIIN: 01-353-3473
In stock
NSN: 5331-01-353-3473
FSC Code: 5331
MPN: KS92612