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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.

5331-00-404-1475 (M25988/2-141)

NIIN: 00-404-1475
In stock
NSN: 5331-00-404-1475
FSC Code: 5331
MPN: M259882141

5331-00-340-5787 (M25988/2-140)

NIIN: 00-340-5787
In stock
NSN: 5331-00-340-5787
FSC Code: 5331
MPN: M259882140

5331-00-411-3902 (M25988/2-143)

NIIN: 00-411-3902
In stock
NSN: 5331-00-411-3902
FSC Code: 5331
MPN: M259882143

5331-01-321-6686 (M25988/2-145)

NIIN: 01-321-6686
In stock
NSN: 5331-01-321-6686
FSC Code: 5331
MPN: M259882145

5331-01-079-7301 (M25988/2-110)

NIIN: 01-079-7301
In stock
NSN: 5331-01-079-7301
FSC Code: 5331
MPN: M259882110

5331-01-080-5008 (M25988/2-131)

NIIN: 01-080-5008
In stock
NSN: 5331-01-080-5008
FSC Code: 5331
MPN: M259882131

5331-00-031-2915 (M25988/2-125)

NIIN: 00-031-2915
In stock
NSN: 5331-00-031-2915
FSC Code: 5331
MPN: M259882125

5331-01-085-8391 (M25988/2-122)

NIIN: 01-085-8391
In stock
NSN: 5331-01-085-8391
FSC Code: 5331
MPN: M259882122

5331-01-134-3299 (M25988/2-130)

NIIN: 01-134-3299
In stock
NSN: 5331-01-134-3299
FSC Code: 5331
MPN: M259882130

5331-01-326-9507 (M25988/2-129)

NIIN: 01-326-9507
In stock
NSN: 5331-01-326-9507
FSC Code: 5331
MPN: M259882129

5331-01-134-0767 (M25988/2-126)

NIIN: 01-134-0767
In stock
NSN: 5331-01-134-0767
FSC Code: 5331
MPN: M259882126

5331-01-079-7307 (M25988/2-109)

NIIN: 01-079-7307
In stock
NSN: 5331-01-079-7307
FSC Code: 5331
MPN: M259882109

5331-01-116-8116 (M25988/2-105)

NIIN: 01-116-8116
In stock
NSN: 5331-01-116-8116
FSC Code: 5331
MPN: M259882105

5331-00-401-4905 (M25988/2-112)

NIIN: 00-401-4905
In stock
NSN: 5331-00-401-4905
FSC Code: 5331
MPN: M259882112

5331-01-136-6139 (M25988/2-118)

NIIN: 01-136-6139
In stock
NSN: 5331-01-136-6139
FSC Code: 5331
MPN: M259882118

5331-01-079-7306 (M25988/2-031)

NIIN: 01-079-7306
In stock
NSN: 5331-01-079-7306
FSC Code: 5331
MPN: M259882031

5331-00-184-4064 (M25988/2-030)

NIIN: 00-184-4064
In stock
NSN: 5331-00-184-4064
FSC Code: 5331
MPN: M259882030

5331-01-324-4112 (M25988/2-029)

NIIN: 01-324-4112
In stock
NSN: 5331-01-324-4112
FSC Code: 5331
MPN: M259882029

5331-01-087-8825 (M25988/2-023)

NIIN: 01-087-8825
In stock
NSN: 5331-01-087-8825
FSC Code: 5331
MPN: M259882023

5331-00-253-5363 (M25988/2-035)

NIIN: 00-253-5363
In stock
NSN: 5331-00-253-5363
FSC Code: 5331
MPN: M259882035

5331-01-330-3176 (M25988/2-027)

NIIN: 01-330-3176
In stock
NSN: 5331-01-330-3176
FSC Code: 5331
MPN: M259882027

5331-00-401-4820 (M25988/2-037)

NIIN: 00-401-4820
In stock
NSN: 5331-00-401-4820
FSC Code: 5331
MPN: M259882037

5331-01-079-5185 (M25988/2-026)

NIIN: 01-079-5185
In stock
NSN: 5331-01-079-5185
FSC Code: 5331
MPN: M259882026

5331-01-087-8824 (M25988/2-022)

NIIN: 01-087-8824
In stock
NSN: 5331-01-087-8824
FSC Code: 5331
MPN: M259882022

5331-00-922-3261 (M25988/2-021)

NIIN: 00-922-3261
In stock
NSN: 5331-00-922-3261
FSC Code: 5331
MPN: M259882021

5331-00-179-9443 (M25988/2-021)

NIIN: 00-179-9443
In stock
NSN: 5331-00-179-9443
FSC Code: 5331
MPN: M259882021

5331-01-326-9506 (M25988/2-019)

NIIN: 01-326-9506
In stock
NSN: 5331-01-326-9506
FSC Code: 5331
MPN: M259882019

5331-01-079-7300 (M25988/2-017)

NIIN: 01-079-7300
In stock
NSN: 5331-01-079-7300
FSC Code: 5331
MPN: M259882017

5331-01-079-7299 (M25988/2-016)

NIIN: 01-079-7299
In stock
NSN: 5331-01-079-7299
FSC Code: 5331
MPN: M259882016

5331-00-401-4804 (M25988/2-018)

NIIN: 00-401-4804
In stock
NSN: 5331-00-401-4804
FSC Code: 5331
MPN: M259882018

5331-00-220-5211 (M25988/2-015)

NIIN: 00-220-5211
In stock
NSN: 5331-00-220-5211
FSC Code: 5331
MPN: M259882015

5331-01-079-7303 (M25988/2-009)

NIIN: 01-079-7303
In stock
NSN: 5331-01-079-7303
FSC Code: 5331
MPN: M259882009

5331-01-025-2734 (M25988/2-003)

NIIN: 01-025-2734
In stock
NSN: 5331-01-025-2734
FSC Code: 5331
MPN: M259882003

5331-01-086-9325 (M25988/2-008)

NIIN: 01-086-9325
In stock
NSN: 5331-01-086-9325
FSC Code: 5331
MPN: M259882008

5331-01-330-9833 (M25988/2-007)

NIIN: 01-330-9833
In stock
NSN: 5331-01-330-9833
FSC Code: 5331
MPN: M259882007

5331-01-080-2230 (M25988/1-920)

NIIN: 01-080-2230
In stock
NSN: 5331-01-080-2230
FSC Code: 5331
MPN: M259881920

5331-01-138-2107 (M25988/1-932)

NIIN: 01-138-2107
In stock
NSN: 5331-01-138-2107
FSC Code: 5331
MPN: M259881932

5331-01-181-8234 (M25988/1-914)

NIIN: 01-181-8234
In stock
NSN: 5331-01-181-8234
FSC Code: 5331
MPN: M259881914

5331-00-279-9320 (M25988/1-924)

NIIN: 00-279-9320
In stock
NSN: 5331-00-279-9320
FSC Code: 5331
MPN: M259881924

5331-01-181-8235 (M25988/1-911)

NIIN: 01-181-8235
In stock
NSN: 5331-01-181-8235
FSC Code: 5331
MPN: M259881911

5331-00-340-4724 (M25988/1-909)

NIIN: 00-340-4724
In stock
NSN: 5331-00-340-4724
FSC Code: 5331
MPN: M259881909

5331-01-298-4845 (M25988/1-901)

NIIN: 01-298-4845
In stock
NSN: 5331-01-298-4845
FSC Code: 5331
MPN: M259881901

5331-01-083-6509 (M25988/1-439)

NIIN: 01-083-6509
In stock
NSN: 5331-01-083-6509
FSC Code: 5331
MPN: M259881439

5331-00-288-1983 (M25988/1-359)

NIIN: 00-288-1983
In stock
NSN: 5331-00-288-1983
FSC Code: 5331
MPN: M259881359

5331-01-083-6508 (M25988/1-367)

NIIN: 01-083-6508
In stock
NSN: 5331-01-083-6508
FSC Code: 5331
MPN: M259881367

5331-00-288-1998 (M25988/1-339)

NIIN: 00-288-1998
In stock
NSN: 5331-00-288-1998
FSC Code: 5331
MPN: M259881339

5331-01-174-8255 (M25988/1-345)

NIIN: 01-174-8255
In stock
NSN: 5331-01-174-8255
FSC Code: 5331
MPN: M259881345

5331-00-279-9401 (M25988/1-332)

NIIN: 00-279-9401
In stock
NSN: 5331-00-279-9401
FSC Code: 5331
MPN: M259881332