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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.

5331-01-263-2688 (423-700-045)

NIIN: 01-263-2688
In stock
NSN: 5331-01-263-2688
FSC Code: 5331
MPN: 423700045

5331-01-263-8132 (423-700-044)

NIIN: 01-263-8132
In stock
NSN: 5331-01-263-8132
FSC Code: 5331
MPN: 423700044

5331-00-663-6847 (42316-8)

NIIN: 00-663-6847
In stock
NSN: 5331-00-663-6847
FSC Code: 5331
MPN: 423168

5331-01-130-0474 (4231-4)

NIIN: 01-130-0474
In stock
NSN: 5331-01-130-0474
FSC Code: 5331
MPN: 42314

5331-01-265-6697 (42311S)

NIIN: 01-265-6697
In stock
NSN: 5331-01-265-6697
FSC Code: 5331
MPN: 42311S

5331-01-182-5500 (4230-005-01)

NIIN: 01-182-5500
In stock
NSN: 5331-01-182-5500
FSC Code: 5331
MPN: 423000501

5331-01-301-8843 (42277E596)

NIIN: 01-301-8843
In stock
NSN: 5331-01-301-8843
FSC Code: 5331
MPN: 42277E596

5331-00-425-2784 (422673PC10)

NIIN: 00-425-2784
In stock
NSN: 5331-00-425-2784
FSC Code: 5331
MPN: 422673PC10

5331-00-424-7475 (4222D)

NIIN: 00-424-7475
In stock
NSN: 5331-00-424-7475
FSC Code: 5331
MPN: 4222D

5331-01-276-9119 (422-240-080)

NIIN: 01-276-9119
In stock
NSN: 5331-01-276-9119
FSC Code: 5331
MPN: 422240080

5331-01-263-8734 (422-113-290)

NIIN: 01-263-8734
In stock
NSN: 5331-01-263-8734
FSC Code: 5331
MPN: 422113290

5331-01-265-1211 (422-040-120)

NIIN: 01-265-1211
In stock
NSN: 5331-01-265-1211
FSC Code: 5331
MPN: 422040120

5331-01-041-4679 (4220-59)

NIIN: 01-041-4679
In stock
NSN: 5331-01-041-4679
FSC Code: 5331
MPN: 422059

5331-01-265-1212 (422-040-140)

NIIN: 01-265-1212
In stock
NSN: 5331-01-265-1212
FSC Code: 5331
MPN: 422040140

5331-01-264-5920 (422-040-130)

NIIN: 01-264-5920
In stock
NSN: 5331-01-264-5920
FSC Code: 5331
MPN: 422040130

5331-01-265-8307 (422-010-140)

NIIN: 01-265-8307
In stock
NSN: 5331-01-265-8307
FSC Code: 5331
MPN: 422010140

5331-01-276-8433 (422-040-040)

NIIN: 01-276-8433
In stock
NSN: 5331-01-276-8433
FSC Code: 5331
MPN: 422040040

5331-01-265-8306 (422-010-220)

NIIN: 01-265-8306
In stock
NSN: 5331-01-265-8306
FSC Code: 5331
MPN: 422010220

5331-01-264-5919 (422-010-060)

NIIN: 01-264-5919
In stock
NSN: 5331-01-264-5919
FSC Code: 5331
MPN: 422010060

5331-01-137-2206 (4219-24)

NIIN: 01-137-2206
In stock
NSN: 5331-01-137-2206
FSC Code: 5331
MPN: 421924

5331-01-343-1057 (146-037-70FS)

NIIN: 01-343-1057
In stock
NSN: 5331-01-343-1057
FSC Code: 5331
MPN: 14603770FS

5331-00-183-0792 (4215-77)

NIIN: 00-183-0792
In stock
NSN: 5331-00-183-0792
FSC Code: 5331
MPN: 421577

5331-01-447-0777 (145R020)

NIIN: 01-447-0777
In stock
NSN: 5331-01-447-0777
FSC Code: 5331
MPN: 145R020

5331-01-137-8773 (4215-24)

NIIN: 01-137-8773
In stock
NSN: 5331-01-137-8773
FSC Code: 5331
MPN: 421524

5331-01-289-2496 (4213-33)

NIIN: 01-289-2496
In stock
NSN: 5331-01-289-2496
FSC Code: 5331
MPN: 421333

5331-00-250-1989 (42121-111)

NIIN: 00-250-1989
In stock
NSN: 5331-00-250-1989
FSC Code: 5331
MPN: 42121111

5331-01-278-7620 (4212-514AD)

NIIN: 01-278-7620
In stock
NSN: 5331-01-278-7620
FSC Code: 5331
MPN: 4212514AD

5331-01-289-2495 (4211-33)

NIIN: 01-289-2495
In stock
NSN: 5331-01-289-2495
FSC Code: 5331
MPN: 421133

5331-01-263-8134 (421-01)

NIIN: 01-263-8134
In stock
NSN: 5331-01-263-8134
FSC Code: 5331
MPN: 42101

5331-01-207-1499 (4210-009-01)

NIIN: 01-207-1499
In stock
NSN: 5331-01-207-1499
FSC Code: 5331
MPN: 421000901

5331-01-547-9512 (S9233-XX-MMA-010/LCS)

NIIN: 01-547-9512
In stock
NSN: 5331-01-547-9512
FSC Code: 5331
MPN: S9233XXMMA010LCS

5331-01-547-9065 (S9233-XX-MMA-010/LCS)

NIIN: 01-547-9065
In stock
NSN: 5331-01-547-9065
FSC Code: 5331
MPN: S9233XXMMA010LCS

5331-01-547-9504 (S9233-XX-MMA-010/LCS)

NIIN: 01-547-9504
In stock
NSN: 5331-01-547-9504
FSC Code: 5331
MPN: S9233XXMMA010LCS

5331-01-458-0696 (145-525-9302)

NIIN: 01-458-0696
In stock
NSN: 5331-01-458-0696
FSC Code: 5331
MPN: 1455259302

5331-01-126-0872 (42-03012-001)

NIIN: 01-126-0872
In stock
NSN: 5331-01-126-0872
FSC Code: 5331
MPN: 4203012001

5331-01-470-1655 (1-454-013)

NIIN: 01-470-1655
In stock
NSN: 5331-01-470-1655
FSC Code: 5331
MPN: 1454013

5331-01-474-1886 (145-3813)

NIIN: 01-474-1886
In stock
NSN: 5331-01-474-1886
FSC Code: 5331
MPN: 1453813

5331-01-284-7891 (4201B-1.50IN-SE-61992-PC8)

NIIN: 01-284-7891
In stock
NSN: 5331-01-284-7891
FSC Code: 5331
MPN: 4201B150INSE61992PC8

5331-01-284-7890 (4201B-1.50IN-SE-61992-PC6)

NIIN: 01-284-7890
In stock
NSN: 5331-01-284-7890
FSC Code: 5331
MPN: 4201B150INSE61992PC6

5331-01-271-2426 (420-05)

NIIN: 01-271-2426
In stock
NSN: 5331-01-271-2426
FSC Code: 5331
MPN: 42005

5331-00-446-2675 (4-200110)

NIIN: 00-446-2675
In stock
NSN: 5331-00-446-2675
FSC Code: 5331
MPN: 4200110

5331-01-315-9466 (4200-002-0012)

NIIN: 01-315-9466
In stock
NSN: 5331-01-315-9466
FSC Code: 5331
MPN: 42000020012

5331-01-324-4823 (41F-8IN)

NIIN: 01-324-4823
In stock
NSN: 5331-01-324-4823
FSC Code: 5331
MPN: 41F8IN

5331-01-124-2959 (41BC)

NIIN: 01-124-2959
In stock
NSN: 5331-01-124-2959
FSC Code: 5331
MPN: 41BC

5331-01-245-3226 (41A742)

NIIN: 01-245-3226
In stock
NSN: 5331-01-245-3226
FSC Code: 5331
MPN: 41A742

5331-01-276-1679 (41A741)

NIIN: 01-276-1679
In stock
NSN: 5331-01-276-1679
FSC Code: 5331
MPN: 41A741

5331-01-103-2434 (41A739)

NIIN: 01-103-2434
In stock
NSN: 5331-01-103-2434
FSC Code: 5331
MPN: 41A739

5331-00-184-0407 (419679-1)

NIIN: 00-184-0407
In stock
NSN: 5331-00-184-0407
FSC Code: 5331
MPN: 4196791