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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.

5331-01-287-7557 (MS9388-028)

NIIN: 01-287-7557
In stock
NSN: 5331-01-287-7557
FSC Code: 5331
MPN: MS9388028

5331-00-001-1979 (MS9388-047)

NIIN: 00-001-1979
In stock
NSN: 5331-00-001-1979
FSC Code: 5331
MPN: MS9388047

5331-01-266-6451 (MS9388-108)

NIIN: 01-266-6451
In stock
NSN: 5331-01-266-6451
FSC Code: 5331
MPN: MS9388108

5331-00-128-2034 (MS9386-426)

NIIN: 00-128-2034
In stock
NSN: 5331-00-128-2034
FSC Code: 5331
MPN: MS9386426

5331-00-111-3713 (MS9388-045)

NIIN: 00-111-3713
In stock
NSN: 5331-00-111-3713
FSC Code: 5331
MPN: MS9388045

5331-01-063-6437 (MS9387-13)

NIIN: 01-063-6437
In stock
NSN: 5331-01-063-6437
FSC Code: 5331
MPN: MS938713

5331-00-528-8653 (MS9386-330)

NIIN: 00-528-8653
In stock
NSN: 5331-00-528-8653
FSC Code: 5331
MPN: MS9386330

5331-00-135-3028 (MS9386-325)

NIIN: 00-135-3028
In stock
NSN: 5331-00-135-3028
FSC Code: 5331
MPN: MS9386325

5331-00-155-4942 (MS9386-331)

NIIN: 00-155-4942
In stock
NSN: 5331-00-155-4942
FSC Code: 5331
MPN: MS9386331

5331-01-308-8211 (MS9386-279)

NIIN: 01-308-8211
In stock
NSN: 5331-01-308-8211
FSC Code: 5331
MPN: MS9386279

5331-00-528-7904 (MS9386-328)

NIIN: 00-528-7904
In stock
NSN: 5331-00-528-7904
FSC Code: 5331
MPN: MS9386328

5331-01-037-2399 (MS9386-261)

NIIN: 01-037-2399
In stock
NSN: 5331-01-037-2399
FSC Code: 5331
MPN: MS9386261

5331-00-275-3341 (MS9386-224)

NIIN: 00-275-3341
In stock
NSN: 5331-00-275-3341
FSC Code: 5331
MPN: MS9386224

5331-00-763-9004 (MS9386-259)

NIIN: 00-763-9004
In stock
NSN: 5331-00-763-9004
FSC Code: 5331
MPN: MS9386259

5331-01-046-0624 (MS9386-215)

NIIN: 01-046-0624
In stock
NSN: 5331-01-046-0624
FSC Code: 5331
MPN: MS9386215

5331-00-528-7532 (MS9386-220)

NIIN: 00-528-7532
In stock
NSN: 5331-00-528-7532
FSC Code: 5331
MPN: MS9386220

5331-00-450-1912 (MS9386-219)

NIIN: 00-450-1912
In stock
NSN: 5331-00-450-1912
FSC Code: 5331
MPN: MS9386219

5331-00-433-9214 (MS9386-152)

NIIN: 00-433-9214
In stock
NSN: 5331-00-433-9214
FSC Code: 5331
MPN: MS9386152

5331-00-528-4912 (MS9386-210)

NIIN: 00-528-4912
In stock
NSN: 5331-00-528-4912
FSC Code: 5331
MPN: MS9386210

5331-00-175-2771 (MS9386-154)

NIIN: 00-175-2771
In stock
NSN: 5331-00-175-2771
FSC Code: 5331
MPN: MS9386154

5331-00-123-2830 (MS9386-211)

NIIN: 00-123-2830
In stock
NSN: 5331-00-123-2830
FSC Code: 5331
MPN: MS9386211

5331-01-205-5041 (MS9386-176)

NIIN: 01-205-5041
In stock
NSN: 5331-01-205-5041
FSC Code: 5331
MPN: MS9386176

5331-01-267-7529 (MS9386-158)

NIIN: 01-267-7529
In stock
NSN: 5331-01-267-7529
FSC Code: 5331
MPN: MS9386158

5331-00-373-0117 (MS9386-164)

NIIN: 00-373-0117
In stock
NSN: 5331-00-373-0117
FSC Code: 5331
MPN: MS9386164

5331-00-194-5456 (MS9386-143)

NIIN: 00-194-5456
In stock
NSN: 5331-00-194-5456
FSC Code: 5331
MPN: MS9386143

5331-00-409-4458 (MS9386-120)

NIIN: 00-409-4458
In stock
NSN: 5331-00-409-4458
FSC Code: 5331
MPN: MS9386120

5331-00-416-9204 (MS9386-151)

NIIN: 00-416-9204
In stock
NSN: 5331-00-416-9204
FSC Code: 5331
MPN: MS9386151

5331-00-184-8626 (MS9386-148)

NIIN: 00-184-8626
In stock
NSN: 5331-00-184-8626
FSC Code: 5331
MPN: MS9386148

5331-01-201-6452 (MS9386-043)

NIIN: 01-201-6452
In stock
NSN: 5331-01-201-6452
FSC Code: 5331
MPN: MS9386043

5331-00-415-2199 (MS9386-137)

NIIN: 00-415-2199
In stock
NSN: 5331-00-415-2199
FSC Code: 5331
MPN: MS9386137

5331-01-199-3441 (MS9386-138)

NIIN: 01-199-3441
In stock
NSN: 5331-01-199-3441
FSC Code: 5331
MPN: MS9386138

5331-01-199-9474 (MS9386-046)

NIIN: 01-199-9474
In stock
NSN: 5331-01-199-9474
FSC Code: 5331
MPN: MS9386046

5331-01-108-8417 (MS9386-035)

NIIN: 01-108-8417
In stock
NSN: 5331-01-108-8417
FSC Code: 5331
MPN: MS9386035

5331-01-126-5280 (MS9386-045)

NIIN: 01-126-5280
In stock
NSN: 5331-01-126-5280
FSC Code: 5331
MPN: MS9386045

5331-00-221-6181 (MS9386-036)

NIIN: 00-221-6181
In stock
NSN: 5331-00-221-6181
FSC Code: 5331
MPN: MS9386036

5331-00-147-6233 (MS9386-038)

NIIN: 00-147-6233
In stock
NSN: 5331-00-147-6233
FSC Code: 5331
MPN: MS9386038

5331-01-182-5255 (MS9386-032)

NIIN: 01-182-5255
In stock
NSN: 5331-01-182-5255
FSC Code: 5331
MPN: MS9386032

5331-01-034-2840 (MS9386-029)

NIIN: 01-034-2840
In stock
NSN: 5331-01-034-2840
FSC Code: 5331
MPN: MS9386029

5331-00-338-4205 (MS9386-040)

NIIN: 00-338-4205
In stock
NSN: 5331-00-338-4205
FSC Code: 5331
MPN: MS9386040

5331-01-183-3387 (MS9386-022)

NIIN: 01-183-3387
In stock
NSN: 5331-01-183-3387
FSC Code: 5331
MPN: MS9386022

5331-00-470-8189 (MS9385-16)

NIIN: 00-470-8189
In stock
NSN: 5331-00-470-8189
FSC Code: 5331
MPN: MS938516

5331-00-450-1911 (MS9386-024)

NIIN: 00-450-1911
In stock
NSN: 5331-00-450-1911
FSC Code: 5331
MPN: MS9386024

5331-00-421-9595 (MS9386-008)

NIIN: 00-421-9595
In stock
NSN: 5331-00-421-9595
FSC Code: 5331
MPN: MS9386008

5331-00-132-6979 (MS9386-019)

NIIN: 00-132-6979
In stock
NSN: 5331-00-132-6979
FSC Code: 5331
MPN: MS9386019

5331-00-163-6624 (MS9385-11)

NIIN: 00-163-6624
In stock
NSN: 5331-00-163-6624
FSC Code: 5331
MPN: MS938511

5331-01-373-4787 (A8241-063-82340-267)

NIIN: 01-373-4787
In stock
NSN: 5331-01-373-4787
FSC Code: 5331
MPN: A824106382340267

5331-01-373-4789 (A8241-063-82340-514)

NIIN: 01-373-4789
In stock
NSN: 5331-01-373-4789
FSC Code: 5331
MPN: A824106382340514

5331-01-373-4783 (A8241-063-82340-117)

NIIN: 01-373-4783
In stock
NSN: 5331-01-373-4783
FSC Code: 5331
MPN: A824106382340117