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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.

5331-01-181-4938 (TF831-215-1)

NIIN: 01-181-4938
In stock
NSN: 5331-01-181-4938
FSC Code: 5331
MPN: TF8312151

5331-01-181-4948 (TF831-210-1)

NIIN: 01-181-4948
In stock
NSN: 5331-01-181-4948
FSC Code: 5331
MPN: TF8312101

5331-01-181-4947 (TF831-116-1)

NIIN: 01-181-4947
In stock
NSN: 5331-01-181-4947
FSC Code: 5331
MPN: TF8311161

5331-01-254-6381 (TF-4JB-P4)

NIIN: 01-254-6381
In stock
NSN: 5331-01-254-6381
FSC Code: 5331
MPN: TF4JBP4

5331-00-931-6747 (TF3-2T)

NIIN: 00-931-6747
In stock
NSN: 5331-00-931-6747
FSC Code: 5331
MPN: TF32T

5331-01-308-8212 (TF2-129T)

NIIN: 01-308-8212
In stock
NSN: 5331-01-308-8212
FSC Code: 5331
MPN: TF2129T

5331-01-310-5259 (TF2-134T)

NIIN: 01-310-5259
In stock
NSN: 5331-01-310-5259
FSC Code: 5331
MPN: TF2134T

5331-01-304-2354 (TF-158)

NIIN: 01-304-2354
In stock
NSN: 5331-01-304-2354
FSC Code: 5331
MPN: TF158

5331-01-174-3477 (TEFLON)

NIIN: 01-174-3477
In stock
NSN: 5331-01-174-3477
FSC Code: 5331
MPN: TEFLON

5331-01-345-2324 (EA-14013-1-B)

NIIN: 01-345-2324
In stock
NSN: 5331-01-345-2324
FSC Code: 5331
MPN: EA140131B

5331-01-346-0290 (E9048142)

NIIN: 01-346-0290
In stock
NSN: 5331-01-346-0290
FSC Code: 5331
MPN: E9048142

5331-01-346-0291 (E9048158)

NIIN: 01-346-0291
In stock
NSN: 5331-01-346-0291
FSC Code: 5331
MPN: E9048158

5331-01-572-7638 (E8J0465)

NIIN: 01-572-7638
In stock
NSN: 5331-01-572-7638
FSC Code: 5331
MPN: E8J0465

5331-01-455-0071 (E8CR130-051)

NIIN: 01-455-0071
In stock
NSN: 5331-01-455-0071
FSC Code: 5331
MPN: E8CR130051

5331-01-367-1166 (E75503017)

NIIN: 01-367-1166
In stock
NSN: 5331-01-367-1166
FSC Code: 5331
MPN: E75503017

5331-01-557-5784 (E75500925)

NIIN: 01-557-5784
In stock
NSN: 5331-01-557-5784
FSC Code: 5331
MPN: E75500925

5331-01-557-5785 (E75502644)

NIIN: 01-557-5785
In stock
NSN: 5331-01-557-5785
FSC Code: 5331
MPN: E75502644

5331-01-509-0263 (E70012)

NIIN: 01-509-0263
In stock
NSN: 5331-01-509-0263
FSC Code: 5331
MPN: E70012

5331-01-475-4029 (E56086)

NIIN: 01-475-4029
In stock
NSN: 5331-01-475-4029
FSC Code: 5331
MPN: E56086

5331-00-104-6224 (TA750)

NIIN: 00-104-6224
In stock
NSN: 5331-00-104-6224
FSC Code: 5331
MPN: TA750

5331-01-432-1459 (E540-80)

NIIN: 01-432-1459
In stock
NSN: 5331-01-432-1459
FSC Code: 5331
MPN: E54080

5331-01-400-2648 (STSV047AL217)

NIIN: 01-400-2648
In stock
NSN: 5331-01-400-2648
FSC Code: 5331
MPN: STSV047AL217

5331-01-466-4571 (E45-0001-002)

NIIN: 01-466-4571
In stock
NSN: 5331-01-466-4571
FSC Code: 5331
MPN: E450001002

5331-01-505-8867 (E45-0006-001)

NIIN: 01-505-8867
In stock
NSN: 5331-01-505-8867
FSC Code: 5331
MPN: E450006001

5331-01-221-9653 (T-9K-14)

NIIN: 01-221-9653
In stock
NSN: 5331-01-221-9653
FSC Code: 5331
MPN: T9K14

5331-01-228-6166 (T-9K-7)

NIIN: 01-228-6166
In stock
NSN: 5331-01-228-6166
FSC Code: 5331
MPN: T9K7

5331-01-084-1082 (T-9A-44-1)

NIIN: 01-084-1082
In stock
NSN: 5331-01-084-1082
FSC Code: 5331
MPN: T9A441

5331-01-084-1850 (T-9B-44)

NIIN: 01-084-1850
In stock
NSN: 5331-01-084-1850
FSC Code: 5331
MPN: T9B44

5331-01-128-4449 (T-9B-43-1)

NIIN: 01-128-4449
In stock
NSN: 5331-01-128-4449
FSC Code: 5331
MPN: T9B431

5331-01-211-7349 (T-9-67)

NIIN: 01-211-7349
In stock
NSN: 5331-01-211-7349
FSC Code: 5331
MPN: T967

5331-01-180-4613 (T-98-12W)

NIIN: 01-180-4613
In stock
NSN: 5331-01-180-4613
FSC Code: 5331
MPN: T9812W

5331-01-427-9787 (N48855-94)

NIIN: 01-427-9787
In stock
NSN: 5331-01-427-9787
FSC Code: 5331
MPN: N4885594

5331-01-546-2299 (E-347PC29)

NIIN: 01-546-2299
In stock
NSN: 5331-01-546-2299
FSC Code: 5331
MPN: E347PC29

5331-01-104-4699 (T9-0008)

NIIN: 01-104-4699
In stock
NSN: 5331-01-104-4699
FSC Code: 5331
MPN: T90008

5331-01-374-2741 (E322-2066-J)

NIIN: 01-374-2741
In stock
NSN: 5331-01-374-2741
FSC Code: 5331
MPN: E3222066J

5331-01-303-6280 (T-85127-0-11)

NIIN: 01-303-6280
In stock
NSN: 5331-01-303-6280
FSC Code: 5331
MPN: T85127011

5331-01-310-8448 (T77858)

NIIN: 01-310-8448
In stock
NSN: 5331-01-310-8448
FSC Code: 5331
MPN: T77858

5331-01-310-8449 (T77613)

NIIN: 01-310-8449
In stock
NSN: 5331-01-310-8449
FSC Code: 5331
MPN: T77613

5331-01-289-9130 (T76938)

NIIN: 01-289-9130
In stock
NSN: 5331-01-289-9130
FSC Code: 5331
MPN: T76938

5331-01-312-4820 (T71981)

NIIN: 01-312-4820
In stock
NSN: 5331-01-312-4820
FSC Code: 5331
MPN: T71981

5331-01-312-7165 (T72571)

NIIN: 01-312-7165
In stock
NSN: 5331-01-312-7165
FSC Code: 5331
MPN: T72571

5331-01-312-7164 (T72573)

NIIN: 01-312-7164
In stock
NSN: 5331-01-312-7164
FSC Code: 5331
MPN: T72573

5331-01-255-3561 (T68412)

NIIN: 01-255-3561
In stock
NSN: 5331-01-255-3561
FSC Code: 5331
MPN: T68412

5331-01-332-4077 (T-595-Y)

NIIN: 01-332-4077
In stock
NSN: 5331-01-332-4077
FSC Code: 5331
MPN: T595Y

5331-01-291-6539 (T-590-Y-BR-20-1)

NIIN: 01-291-6539
In stock
NSN: 5331-01-291-6539
FSC Code: 5331
MPN: T590YBR201

5331-01-332-4078 (T-595-Y)

NIIN: 01-332-4078
In stock
NSN: 5331-01-332-4078
FSC Code: 5331
MPN: T595Y

5331-01-111-9281 (T59816)

NIIN: 01-111-9281
In stock
NSN: 5331-01-111-9281
FSC Code: 5331
MPN: T59816

5331-01-031-4865 (T590YPC13SIZE1-1/2IN)

NIIN: 01-031-4865
In stock
NSN: 5331-01-031-4865
FSC Code: 5331
MPN: T590YPC13SIZE112IN