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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.

5331-01-537-1747 (25-16177-3)

NIIN: 01-537-1747
In stock
NSN: 5331-01-537-1747
FSC Code: 5331
MPN: 25161773

5331-01-537-1645 (25-16131-10)

NIIN: 01-537-1645
In stock
NSN: 5331-01-537-1645
FSC Code: 5331
MPN: 251613110

5331-01-537-1745 (25-16131-7)

NIIN: 01-537-1745
In stock
NSN: 5331-01-537-1745
FSC Code: 5331
MPN: 25161317

5331-01-536-0705 (25-16131-6)

NIIN: 01-536-0705
In stock
NSN: 5331-01-536-0705
FSC Code: 5331
MPN: 25161316

5331-01-561-1023 (25-159)

NIIN: 01-561-1023
In stock
NSN: 5331-01-561-1023
FSC Code: 5331
MPN: 25159

5331-01-372-3528 (25155-244)

NIIN: 01-372-3528
In stock
NSN: 5331-01-372-3528
FSC Code: 5331
MPN: 25155244

5331-01-529-8926 (25154-021)

NIIN: 01-529-8926
In stock
NSN: 5331-01-529-8926
FSC Code: 5331
MPN: 25154021

5331-01-442-0856 (25-15011-C-10)

NIIN: 01-442-0856
In stock
NSN: 5331-01-442-0856
FSC Code: 5331
MPN: 2515011C10

5331-01-445-7760 (25-15011-B-10)

NIIN: 01-445-7760
In stock
NSN: 5331-01-445-7760
FSC Code: 5331
MPN: 2515011B10

5331-01-561-1022 (25-150)

NIIN: 01-561-1022
In stock
NSN: 5331-01-561-1022
FSC Code: 5331
MPN: 25150

5331-01-558-6776 (25152-146)

NIIN: 01-558-6776
In stock
NSN: 5331-01-558-6776
FSC Code: 5331
MPN: 25152146

5331-01-558-9292 (25152-322)

NIIN: 01-558-9292
In stock
NSN: 5331-01-558-9292
FSC Code: 5331
MPN: 25152322

5331-00-440-3874 (6261-8307)

NIIN: 00-440-3874
In stock
NSN: 5331-00-440-3874
FSC Code: 5331
MPN: 62618307

5331-01-388-4499 (25141-149)

NIIN: 01-388-4499
In stock
NSN: 5331-01-388-4499
FSC Code: 5331
MPN: 25141149

5331-01-367-4110 (A25141-212-4058/90)

NIIN: 01-367-4110
In stock
NSN: 5331-01-367-4110
FSC Code: 5331
MPN: A25141212405890

5331-01-388-4465 (25141-110)

NIIN: 01-388-4465
In stock
NSN: 5331-01-388-4465
FSC Code: 5331
MPN: 25141110

5331-01-419-6549 (25141-219-STD)

NIIN: 01-419-6549
In stock
NSN: 5331-01-419-6549
FSC Code: 5331
MPN: 25141219STD

5331-01-388-4498 (25141-016)

NIIN: 01-388-4498
In stock
NSN: 5331-01-388-4498
FSC Code: 5331
MPN: 25141016

5331-01-407-7180 (25133-04)

NIIN: 01-407-7180
In stock
NSN: 5331-01-407-7180
FSC Code: 5331
MPN: 2513304

5331-01-265-0571 (625NBGV86-7B)

NIIN: 01-265-0571
In stock
NSN: 5331-01-265-0571
FSC Code: 5331
MPN: 625NBGV867B

5331-01-439-5765 (25-12067)

NIIN: 01-439-5765
In stock
NSN: 5331-01-439-5765
FSC Code: 5331
MPN: 2512067

5331-01-509-8410 (25-12031)

NIIN: 01-509-8410
In stock
NSN: 5331-01-509-8410
FSC Code: 5331
MPN: 2512031

5331-01-397-6815 (2-512-007-872)

NIIN: 01-397-6815
In stock
NSN: 5331-01-397-6815
FSC Code: 5331
MPN: 2512007872

5331-01-522-5558 (2-512-033-894)

NIIN: 01-522-5558
In stock
NSN: 5331-01-522-5558
FSC Code: 5331
MPN: 2512033894

5331-01-522-5569 (2-512-010-894)

NIIN: 01-522-5569
In stock
NSN: 5331-01-522-5569
FSC Code: 5331
MPN: 2512010894

5331-01-367-0455 (2-512-001-810)

NIIN: 01-367-0455
In stock
NSN: 5331-01-367-0455
FSC Code: 5331
MPN: 2512001810

5331-01-512-1179 (25-11332)

NIIN: 01-512-1179
In stock
NSN: 5331-01-512-1179
FSC Code: 5331
MPN: 2511332

5331-01-561-9007 (2-510-011-860-00)

NIIN: 01-561-9007
In stock
NSN: 5331-01-561-9007
FSC Code: 5331
MPN: 251001186000

5331-01-467-5845 (2-510-012-867)

NIIN: 01-467-5845
In stock
NSN: 5331-01-467-5845
FSC Code: 5331
MPN: 2510012867

5331-00-492-2962 (625058C1)

NIIN: 00-492-2962
In stock
NSN: 5331-00-492-2962
FSC Code: 5331
MPN: 625058C1

5331-01-283-4653 (624-R)

NIIN: 01-283-4653
In stock
NSN: 5331-01-283-4653
FSC Code: 5331
MPN: 624R

5331-01-327-2625 (62488-43)

NIIN: 01-327-2625
In stock
NSN: 5331-01-327-2625
FSC Code: 5331
MPN: 6248843

5331-01-105-7055 (62490-06)

NIIN: 01-105-7055
In stock
NSN: 5331-01-105-7055
FSC Code: 5331
MPN: 6249006

5331-01-556-5521 (2507894C1)

NIIN: 01-556-5521
In stock
NSN: 5331-01-556-5521
FSC Code: 5331
MPN: 2507894C1

5331-01-011-4020 (62489-57)

NIIN: 01-011-4020
In stock
NSN: 5331-01-011-4020
FSC Code: 5331
MPN: 6248957

5331-01-556-5330 (A1205-V-2648)

NIIN: 01-556-5330
In stock
NSN: 5331-01-556-5330
FSC Code: 5331
MPN: A1205V2648

5331-00-286-5744 (62-463-7)

NIIN: 00-286-5744
In stock
NSN: 5331-00-286-5744
FSC Code: 5331
MPN: 624637

5331-01-556-5305 (2506277C1)

NIIN: 01-556-5305
In stock
NSN: 5331-01-556-5305
FSC Code: 5331
MPN: 2506277C1

5331-01-535-6050 (2506277C1)

NIIN: 01-535-6050
In stock
NSN: 5331-01-535-6050
FSC Code: 5331
MPN: 2506277C1

5331-01-513-2978 (250-510)

NIIN: 01-513-2978
In stock
NSN: 5331-01-513-2978
FSC Code: 5331
MPN: 250510

5331-01-513-8939 (250-460)

NIIN: 01-513-8939
In stock
NSN: 5331-01-513-8939
FSC Code: 5331
MPN: 250460

5331-01-561-4269 (2504-5998-010)

NIIN: 01-561-4269
In stock
NSN: 5331-01-561-4269
FSC Code: 5331
MPN: 25045998010

5331-01-561-1021 (25-042)

NIIN: 01-561-1021
In stock
NSN: 5331-01-561-1021
FSC Code: 5331
MPN: 25042

5331-01-329-1877 (623U50-0006)

NIIN: 01-329-1877
In stock
NSN: 5331-01-329-1877
FSC Code: 5331
MPN: 623U500006

5331-01-164-0897 (6-239-35-01-3)

NIIN: 01-164-0897
In stock
NSN: 5331-01-164-0897
FSC Code: 5331
MPN: 623935013

5331-01-267-1653 (6-239-35-01-3-3)

NIIN: 01-267-1653
In stock
NSN: 5331-01-267-1653
FSC Code: 5331
MPN: 6239350133

5331-01-331-9289 (6239185-97)

NIIN: 01-331-9289
In stock
NSN: 5331-01-331-9289
FSC Code: 5331
MPN: 623918597

5331-01-333-2678 (6239136-99)

NIIN: 01-333-2678
In stock
NSN: 5331-01-333-2678
FSC Code: 5331
MPN: 623913699