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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.

5331-01-101-3193 (5-125)

NIIN: 01-101-3193
In stock
NSN: 5331-01-101-3193
FSC Code: 5331
MPN: 5125

5331-01-561-4986 (185D7159-4)

NIIN: 01-561-4986
In stock
NSN: 5331-01-561-4986
FSC Code: 5331
MPN: 185D71594

5331-01-408-7123 (18-59-MIL-1-2406-14)

NIIN: 01-408-7123
In stock
NSN: 5331-01-408-7123
FSC Code: 5331
MPN: 1859MIL1240614

5331-01-413-5500 (18-58002-1)

NIIN: 01-413-5500
In stock
NSN: 5331-01-413-5500
FSC Code: 5331
MPN: 18580021

5331-01-297-7428 (5120-V-15)

NIIN: 01-297-7428
In stock
NSN: 5331-01-297-7428
FSC Code: 5331
MPN: 5120V15

5331-00-641-3663 (5120-554514-2-4)

NIIN: 00-641-3663
In stock
NSN: 5331-00-641-3663
FSC Code: 5331
MPN: 512055451424

5331-00-486-8520 (5120-50)

NIIN: 00-486-8520
In stock
NSN: 5331-00-486-8520
FSC Code: 5331
MPN: 512050

5331-00-250-9894 (5120-20)

NIIN: 00-250-9894
In stock
NSN: 5331-00-250-9894
FSC Code: 5331
MPN: 512020

5331-01-436-6112 (185-6659)

NIIN: 01-436-6112
In stock
NSN: 5331-01-436-6112
FSC Code: 5331
MPN: 1856659

5331-01-514-6753 (185-6155)

NIIN: 01-514-6753
In stock
NSN: 5331-01-514-6753
FSC Code: 5331
MPN: 1856155

5331-01-514-1108 (185-5929)

NIIN: 01-514-1108
In stock
NSN: 5331-01-514-1108
FSC Code: 5331
MPN: 1855929

5331-01-514-5783 (185-5870)

NIIN: 01-514-5783
In stock
NSN: 5331-01-514-5783
FSC Code: 5331
MPN: 1855870

5331-01-436-6108 (185-5869)

NIIN: 01-436-6108
In stock
NSN: 5331-01-436-6108
FSC Code: 5331
MPN: 1855869

5331-01-514-1214 (185-5126)

NIIN: 01-514-1214
In stock
NSN: 5331-01-514-1214
FSC Code: 5331
MPN: 1855126

5331-01-436-6107 (185-3080)

NIIN: 01-436-6107
In stock
NSN: 5331-01-436-6107
FSC Code: 5331
MPN: 1853080

5331-01-411-4407 (185-2371)

NIIN: 01-411-4407
In stock
NSN: 5331-01-411-4407
FSC Code: 5331
MPN: 1852371

5331-01-411-5052 (185-2372)

NIIN: 01-411-5052
In stock
NSN: 5331-01-411-5052
FSC Code: 5331
MPN: 1852372

5331-01-411-4410 (185-2461)

NIIN: 01-411-4410
In stock
NSN: 5331-01-411-4410
FSC Code: 5331
MPN: 1852461

5331-01-411-5048 (185-2374)

NIIN: 01-411-5048
In stock
NSN: 5331-01-411-5048
FSC Code: 5331
MPN: 1852374

5331-01-411-5063 (185-2373)

NIIN: 01-411-5063
In stock
NSN: 5331-01-411-5063
FSC Code: 5331
MPN: 1852373

5331-01-411-5032 (185-2349)

NIIN: 01-411-5032
In stock
NSN: 5331-01-411-5032
FSC Code: 5331
MPN: 1852349

5331-01-412-0509 (185-2348)

NIIN: 01-412-0509
In stock
NSN: 5331-01-412-0509
FSC Code: 5331
MPN: 1852348

5331-01-411-5070 (185-2338)

NIIN: 01-411-5070
In stock
NSN: 5331-01-411-5070
FSC Code: 5331
MPN: 1852338

5331-01-411-5067 (185-2318)

NIIN: 01-411-5067
In stock
NSN: 5331-01-411-5067
FSC Code: 5331
MPN: 1852318

5331-01-411-5057 (185-2198)

NIIN: 01-411-5057
In stock
NSN: 5331-01-411-5057
FSC Code: 5331
MPN: 1852198

5331-01-411-5066 (185-2197)

NIIN: 01-411-5066
In stock
NSN: 5331-01-411-5066
FSC Code: 5331
MPN: 1852197

5331-01-411-5056 (185-2196)

NIIN: 01-411-5056
In stock
NSN: 5331-01-411-5056
FSC Code: 5331
MPN: 1852196

5331-01-411-5043 (185-2095)

NIIN: 01-411-5043
In stock
NSN: 5331-01-411-5043
FSC Code: 5331
MPN: 1852095

5331-00-136-7823 (5112-51)

NIIN: 00-136-7823
In stock
NSN: 5331-00-136-7823
FSC Code: 5331
MPN: 511251

5331-01-183-1282 (5112-001-03)

NIIN: 01-183-1282
In stock
NSN: 5331-01-183-1282
FSC Code: 5331
MPN: 511200103

5331-01-458-6664 (185-02-600)

NIIN: 01-458-6664
In stock
NSN: 5331-01-458-6664
FSC Code: 5331
MPN: 18502600

5331-00-794-7034 (5-108L449-6)

NIIN: 00-794-7034
In stock
NSN: 5331-00-794-7034
FSC Code: 5331
MPN: 5108L4496

5331-01-398-2840 (184C6429P0018)

NIIN: 01-398-2840
In stock
NSN: 5331-01-398-2840
FSC Code: 5331
MPN: 184C6429P0018

5331-01-377-2668 (7000015928)

NIIN: 01-377-2668
In stock
NSN: 5331-01-377-2668
FSC Code: 5331
MPN: 7000015928

5331-01-061-3262 (5-106N497-70)

NIIN: 01-061-3262
In stock
NSN: 5331-01-061-3262
FSC Code: 5331
MPN: 5106N49770

5331-01-237-5244 (5-107)

NIIN: 01-237-5244
In stock
NSN: 5331-01-237-5244
FSC Code: 5331
MPN: 5107

5331-01-556-5170 (1846295C1)

NIIN: 01-556-5170
In stock
NSN: 5331-01-556-5170
FSC Code: 5331
MPN: 1846295C1

5331-01-556-5165 (1844447C1)

NIIN: 01-556-5165
In stock
NSN: 5331-01-556-5165
FSC Code: 5331
MPN: 1844447C1

5331-01-566-5687 (1844934C1)

NIIN: 01-566-5687
In stock
NSN: 5331-01-566-5687
FSC Code: 5331
MPN: 1844934C1

5331-01-521-7351 (18441-3K)

NIIN: 01-521-7351
In stock
NSN: 5331-01-521-7351
FSC Code: 5331
MPN: 184413K

5331-01-566-5684 (1843971C1)

NIIN: 01-566-5684
In stock
NSN: 5331-01-566-5684
FSC Code: 5331
MPN: 1843971C1

5331-01-566-5685 (1843845C1)

NIIN: 01-566-5685
In stock
NSN: 5331-01-566-5685
FSC Code: 5331
MPN: 1843845C1

5331-01-311-7142 (5-105E515-80)

NIIN: 01-311-7142
In stock
NSN: 5331-01-311-7142
FSC Code: 5331
MPN: 5105E51580

5331-01-229-3511 (5-105C557-70)

NIIN: 01-229-3511
In stock
NSN: 5331-01-229-3511
FSC Code: 5331
MPN: 5105C55770

5331-00-055-5034 (5-105-47-071)

NIIN: 00-055-5034
In stock
NSN: 5331-00-055-5034
FSC Code: 5331
MPN: 510547071

5331-00-171-8044 (510537PC2)

NIIN: 00-171-8044
In stock
NSN: 5331-00-171-8044
FSC Code: 5331
MPN: 510537PC2

5331-01-566-5648 (1841885C1)

NIIN: 01-566-5648
In stock
NSN: 5331-01-566-5648
FSC Code: 5331
MPN: 1841885C1

5331-01-566-6444 (1842021C91)

NIIN: 01-566-6444
In stock
NSN: 5331-01-566-6444
FSC Code: 5331
MPN: 1842021C91