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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.

5331-01-133-5858 (845-188957)

NIIN: 01-133-5858
In stock
NSN: 5331-01-133-5858
FSC Code: 5331
MPN: 845188957

5331-01-439-2169 (4238-366Y)

NIIN: 01-439-2169
In stock
NSN: 5331-01-439-2169
FSC Code: 5331
MPN: 4238366Y

5331-01-568-3797 (423709-11B)

NIIN: 01-568-3797
In stock
NSN: 5331-01-568-3797
FSC Code: 5331
MPN: 42370911B

5331-01-410-8447 (4236-0037)

NIIN: 01-410-8447
In stock
NSN: 5331-01-410-8447
FSC Code: 5331
MPN: 42360037

5331-00-814-2552 (8444-60-3560)

NIIN: 00-814-2552
In stock
NSN: 5331-00-814-2552
FSC Code: 5331
MPN: 8444603560

5331-00-079-6452 (8442B35)

NIIN: 00-079-6452
In stock
NSN: 5331-00-079-6452
FSC Code: 5331
MPN: 8442B35

5331-00-764-2386 (8439-70-241)

NIIN: 00-764-2386
In stock
NSN: 5331-00-764-2386
FSC Code: 5331
MPN: 843970241

5331-00-078-0279 (8439-70-229)

NIIN: 00-078-0279
In stock
NSN: 5331-00-078-0279
FSC Code: 5331
MPN: 843970229

5331-01-512-5691 (422-210-030)

NIIN: 01-512-5691
In stock
NSN: 5331-01-512-5691
FSC Code: 5331
MPN: 422210030

5331-00-689-6494 (84-2683)

NIIN: 00-689-6494
In stock
NSN: 5331-00-689-6494
FSC Code: 5331
MPN: 842683

5331-01-417-6162 (421900-48-FU)

NIIN: 01-417-6162
In stock
NSN: 5331-01-417-6162
FSC Code: 5331
MPN: 42190048FU

5331-00-972-3172 (8419-7446-70)

NIIN: 00-972-3172
In stock
NSN: 5331-00-972-3172
FSC Code: 5331
MPN: 8419744670

5331-99-785-9892 (D5002ITEM197)

NIIN: 99-785-9892
In stock
NSN: 5331-99-785-9892
FSC Code: 5331
MPN: D5002ITEM197

5331-01-499-8688 (4211-69)

NIIN: 01-499-8688
In stock
NSN: 5331-01-499-8688
FSC Code: 5331
MPN: 421169

5331-00-291-7359 (84-1071)

NIIN: 00-291-7359
In stock
NSN: 5331-00-291-7359
FSC Code: 5331
MPN: 841071

5331-01-440-7705 (4211-1/2IN-PACKING)

NIIN: 01-440-7705
In stock
NSN: 5331-01-440-7705
FSC Code: 5331
MPN: 421112INPACKING

5331-01-389-0113 (ARP568A4216)

NIIN: 01-389-0113
In stock
NSN: 5331-01-389-0113
FSC Code: 5331
MPN: ARP568A4216

5331-00-285-9770 (84-1045)

NIIN: 00-285-9770
In stock
NSN: 5331-00-285-9770
FSC Code: 5331
MPN: 841045

5331-01-557-9717 (42082-13)

NIIN: 01-557-9717
In stock
NSN: 5331-01-557-9717
FSC Code: 5331
MPN: 4208213

5331-01-565-4942 (42082-035)

NIIN: 01-565-4942
In stock
NSN: 5331-01-565-4942
FSC Code: 5331
MPN: 42082035

5331-01-410-7876 (42079-0)

NIIN: 01-410-7876
In stock
NSN: 5331-01-410-7876
FSC Code: 5331
MPN: 420790

5331-01-557-9718 (42082-022)

NIIN: 01-557-9718
In stock
NSN: 5331-01-557-9718
FSC Code: 5331
MPN: 42082022

5331-01-565-4949 (42082-008)

NIIN: 01-565-4949
In stock
NSN: 5331-01-565-4949
FSC Code: 5331
MPN: 42082008

5331-01-410-7873 (42074-0)

NIIN: 01-410-7873
In stock
NSN: 5331-01-410-7873
FSC Code: 5331
MPN: 420740

5331-01-410-7874 (42072-0)

NIIN: 01-410-7874
In stock
NSN: 5331-01-410-7874
FSC Code: 5331
MPN: 420720

5331-01-482-4508 (4205-295-1800)

NIIN: 01-482-4508
In stock
NSN: 5331-01-482-4508
FSC Code: 5331
MPN: 42052951800

5331-01-219-2544 (83R0504-3EE)

NIIN: 01-219-2544
In stock
NSN: 5331-01-219-2544
FSC Code: 5331
MPN: 83R05043EE

5331-01-225-4806 (83R0504-3CC)

NIIN: 01-225-4806
In stock
NSN: 5331-01-225-4806
FSC Code: 5331
MPN: 83R05043CC

5331-01-219-2543 (83R0504-2DD)

NIIN: 01-219-2543
In stock
NSN: 5331-01-219-2543
FSC Code: 5331
MPN: 83R05042DD

5331-01-445-2250 (420-05-PC034)

NIIN: 01-445-2250
In stock
NSN: 5331-01-445-2250
FSC Code: 5331
MPN: 42005PC034

5331-01-398-3595 (42003B)

NIIN: 01-398-3595
In stock
NSN: 5331-01-398-3595
FSC Code: 5331
MPN: 42003B

5331-01-526-0240 (42-00243-07)

NIIN: 01-526-0240
In stock
NSN: 5331-01-526-0240
FSC Code: 5331
MPN: 420024307

5331-01-261-1591 (8396-470A)

NIIN: 01-261-1591
In stock
NSN: 5331-01-261-1591
FSC Code: 5331
MPN: 8396470A

5331-01-264-3537 (8395-460A)

NIIN: 01-264-3537
In stock
NSN: 5331-01-264-3537
FSC Code: 5331
MPN: 8395460A

5331-01-368-8263 (4200-034-0018)

NIIN: 01-368-8263
In stock
NSN: 5331-01-368-8263
FSC Code: 5331
MPN: 42000340018

5331-12-178-6403 (700429041000)

NIIN: 12-178-6403
In stock
NSN: 5331-12-178-6403
FSC Code: 5331
MPN: 700429041000

5331-01-205-9777 (838977-7)

NIIN: 01-205-9777
In stock
NSN: 5331-01-205-9777
FSC Code: 5331
MPN: 8389777

5331-01-311-1607 (838821-7)

NIIN: 01-311-1607
In stock
NSN: 5331-01-311-1607
FSC Code: 5331
MPN: 8388217

5331-01-089-9148 (8386-10)

NIIN: 01-089-9148
In stock
NSN: 5331-01-089-9148
FSC Code: 5331
MPN: 838610

5331-01-321-4125 (83-83886)

NIIN: 01-321-4125
In stock
NSN: 5331-01-321-4125
FSC Code: 5331
MPN: 8383886

5331-14-427-5845 (60800G99G4W03P7)

NIIN: 14-427-5845
In stock
NSN: 5331-14-427-5845
FSC Code: 5331
MPN: 60800G99G4W03P7

5331-00-917-6088 (83682-72X5PC12)

NIIN: 00-917-6088
In stock
NSN: 5331-00-917-6088
FSC Code: 5331
MPN: 8368272X5PC12

5331-00-285-9863 (83615S41-137PC266)

NIIN: 00-285-9863
In stock
NSN: 5331-00-285-9863
FSC Code: 5331
MPN: 83615S41137PC266

5331-01-013-1343 (83597-33)

NIIN: 01-013-1343
In stock
NSN: 5331-01-013-1343
FSC Code: 5331
MPN: 8359733

5331-01-013-1090 (83597-32)

NIIN: 01-013-1090
In stock
NSN: 5331-01-013-1090
FSC Code: 5331
MPN: 8359732

5331-00-842-1233 (83553-78X2PC5)

NIIN: 00-842-1233
In stock
NSN: 5331-00-842-1233
FSC Code: 5331
MPN: 8355378X2PC5

5331-25-150-2579 (4-18449)

NIIN: 25-150-2579
In stock
NSN: 5331-25-150-2579
FSC Code: 5331
MPN: 418449

5331-25-150-2580 (4-18449)

NIIN: 25-150-2580
In stock
NSN: 5331-25-150-2580
FSC Code: 5331
MPN: 418449