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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.

5331-01-076-0202 (CT336-3)

NIIN: 01-076-0202
In stock
NSN: 5331-01-076-0202
FSC Code: 5331
MPN: CT3363

5331-01-076-1313 (CT336-12)

NIIN: 01-076-1313
In stock
NSN: 5331-01-076-1313
FSC Code: 5331
MPN: CT33612

5331-01-103-5751 (CST-121-2)

NIIN: 01-103-5751
In stock
NSN: 5331-01-103-5751
FSC Code: 5331
MPN: CST1212

5331-01-103-5750 (CST-121-1)

NIIN: 01-103-5750
In stock
NSN: 5331-01-103-5750
FSC Code: 5331
MPN: CST1211

5331-01-145-7559 (CSS000652)

NIIN: 01-145-7559
In stock
NSN: 5331-01-145-7559
FSC Code: 5331
MPN: CSS000652

5331-01-381-2263 (6831-001)

NIIN: 01-381-2263
In stock
NSN: 5331-01-381-2263
FSC Code: 5331
MPN: 6831001

5331-01-447-0792 (6831842-015)

NIIN: 01-447-0792
In stock
NSN: 5331-01-447-0792
FSC Code: 5331
MPN: 6831842015

5331-00-338-4668 (CSA337-2-39)

NIIN: 00-338-4668
In stock
NSN: 5331-00-338-4668
FSC Code: 5331
MPN: CSA337239

5331-00-441-9876 (CSA337-2-25)

NIIN: 00-441-9876
In stock
NSN: 5331-00-441-9876
FSC Code: 5331
MPN: CSA337225

5331-00-005-0880 (CSA337-2-33)

NIIN: 00-005-0880
In stock
NSN: 5331-00-005-0880
FSC Code: 5331
MPN: CSA337233

5331-00-627-9354 (CSA337-2-62)

NIIN: 00-627-9354
In stock
NSN: 5331-00-627-9354
FSC Code: 5331
MPN: CSA337262

5331-00-175-7567 (CSA-337-2-10)

NIIN: 00-175-7567
In stock
NSN: 5331-00-175-7567
FSC Code: 5331
MPN: CSA337210

5331-01-436-5699 (R978800436)

NIIN: 01-436-5699
In stock
NSN: 5331-01-436-5699
FSC Code: 5331
MPN: R978800436

5331-01-541-3064 (68-1599)

NIIN: 01-541-3064
In stock
NSN: 5331-01-541-3064
FSC Code: 5331
MPN: 681599

5331-01-514-9926 (68-1583)

NIIN: 01-514-9926
In stock
NSN: 5331-01-514-9926
FSC Code: 5331
MPN: 681583

5331-01-491-8842 (68-1229)

NIIN: 01-491-8842
In stock
NSN: 5331-01-491-8842
FSC Code: 5331
MPN: 681229

5331-25-150-9059 (68112622-00)

NIIN: 25-150-9059
In stock
NSN: 5331-25-150-9059
FSC Code: 5331
MPN: 6811262200

5331-25-150-9061 (68112438-00)

NIIN: 25-150-9061
In stock
NSN: 5331-25-150-9061
FSC Code: 5331
MPN: 6811243800

5331-25-150-9063 (ASSY68112540)

NIIN: 25-150-9063
In stock
NSN: 5331-25-150-9063
FSC Code: 5331
MPN: ASSY68112540

5331-01-460-5617 (68104-119)

NIIN: 01-460-5617
In stock
NSN: 5331-01-460-5617
FSC Code: 5331
MPN: 68104119

5331-01-346-0271 (68101-022)

NIIN: 01-346-0271
In stock
NSN: 5331-01-346-0271
FSC Code: 5331
MPN: 68101022

5331-01-285-0674 (CS001467AITEM23)

NIIN: 01-285-0674
In stock
NSN: 5331-01-285-0674
FSC Code: 5331
MPN: CS001467AITEM23

5331-25-150-9062 (68098359-02)

NIIN: 25-150-9062
In stock
NSN: 5331-25-150-9062
FSC Code: 5331
MPN: 6809835902

5331-01-562-5699 (680187C1)

NIIN: 01-562-5699
In stock
NSN: 5331-01-562-5699
FSC Code: 5331
MPN: 680187C1

5331-01-492-5204 (67KS-91510-627)

NIIN: 01-492-5204
In stock
NSN: 5331-01-492-5204
FSC Code: 5331
MPN: 67KS91510627

5331-99-524-8654 (678-524-8654)

NIIN: 99-524-8654
In stock
NSN: 5331-99-524-8654
FSC Code: 5331
MPN: 6785248654

5331-01-420-2606 (90130A029)

NIIN: 01-420-2606
In stock
NSN: 5331-01-420-2606
FSC Code: 5331
MPN: 90130A029

5331-01-254-8296 (CR50/23)

NIIN: 01-254-8296
In stock
NSN: 5331-01-254-8296
FSC Code: 5331
MPN: CR5023

5331-01-254-7292 (CR50/16)

NIIN: 01-254-7292
In stock
NSN: 5331-01-254-7292
FSC Code: 5331
MPN: CR5016

5331-01-254-7293 (CR50/17)

NIIN: 01-254-7293
In stock
NSN: 5331-01-254-7293
FSC Code: 5331
MPN: CR5017

5331-01-255-1058 (CR50/166)

NIIN: 01-255-1058
In stock
NSN: 5331-01-255-1058
FSC Code: 5331
MPN: CR50166

5331-01-310-9012 (CR5/23)

NIIN: 01-310-9012
In stock
NSN: 5331-01-310-9012
FSC Code: 5331
MPN: CR523

5331-01-310-9010 (CR5/16)

NIIN: 01-310-9010
In stock
NSN: 5331-01-310-9010
FSC Code: 5331
MPN: CR516

5331-01-310-9011 (CR5/17)

NIIN: 01-310-9011
In stock
NSN: 5331-01-310-9011
FSC Code: 5331
MPN: CR517

5331-01-310-9955 (CR5/166)

NIIN: 01-310-9955
In stock
NSN: 5331-01-310-9955
FSC Code: 5331
MPN: CR5166

5331-01-492-8939 (676-00037)

NIIN: 01-492-8939
In stock
NSN: 5331-01-492-8939
FSC Code: 5331
MPN: 67600037

5331-01-476-3255 (676-00236-0)

NIIN: 01-476-3255
In stock
NSN: 5331-01-476-3255
FSC Code: 5331
MPN: 676002360

5331-01-382-4197 (676-00025)

NIIN: 01-382-4197
In stock
NSN: 5331-01-382-4197
FSC Code: 5331
MPN: 67600025

5331-01-432-7896 (6758204-26)

NIIN: 01-432-7896
In stock
NSN: 5331-01-432-7896
FSC Code: 5331
MPN: 675820426

5331-01-476-3093 (6754(N4))

NIIN: 01-476-3093
In stock
NSN: 5331-01-476-3093
FSC Code: 5331
MPN: 6754N4

5331-01-217-2945 (CR33/166)

NIIN: 01-217-2945
In stock
NSN: 5331-01-217-2945
FSC Code: 5331
MPN: CR33166

5331-01-211-0476 (CR33/16)

NIIN: 01-211-0476
In stock
NSN: 5331-01-211-0476
FSC Code: 5331
MPN: CR3316

5331-01-217-7001 (CR33/23)

NIIN: 01-217-7001
In stock
NSN: 5331-01-217-7001
FSC Code: 5331
MPN: CR3323

5331-01-211-0477 (CR33/17)

NIIN: 01-211-0477
In stock
NSN: 5331-01-211-0477
FSC Code: 5331
MPN: CR3317

5331-01-469-1725 (67500-70)

NIIN: 01-469-1725
In stock
NSN: 5331-01-469-1725
FSC Code: 5331
MPN: 6750070

5331-01-497-1805 (675-00240)

NIIN: 01-497-1805
In stock
NSN: 5331-01-497-1805
FSC Code: 5331
MPN: 67500240

5331-01-453-1983 (PL19466-1)

NIIN: 01-453-1983
In stock
NSN: 5331-01-453-1983
FSC Code: 5331
MPN: PL194661

5331-01-466-7282 (PL-20430-1)

NIIN: 01-466-7282
In stock
NSN: 5331-01-466-7282
FSC Code: 5331
MPN: PL204301