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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.

5331-01-549-9343 (MS29561-162)

NIIN: 01-549-9343
In stock
NSN: 5331-01-549-9343
FSC Code: 5331
MPN: MS29561162

5331-01-514-0949 (MS29513-135)

NIIN: 01-514-0949
In stock
NSN: 5331-01-514-0949
FSC Code: 5331
MPN: MS29513135

5331-01-514-1705 (MS29513-258)

NIIN: 01-514-1705
In stock
NSN: 5331-01-514-1705
FSC Code: 5331
MPN: MS29513258

5331-01-546-9060 (MS29561-158)

NIIN: 01-546-9060
In stock
NSN: 5331-01-546-9060
FSC Code: 5331
MPN: MS29561158

5331-01-514-0923 (MS28775-118)

NIIN: 01-514-0923
In stock
NSN: 5331-01-514-0923
FSC Code: 5331
MPN: MS28775118

5331-01-507-4203 (MS28778-02)

NIIN: 01-507-4203
In stock
NSN: 5331-01-507-4203
FSC Code: 5331
MPN: MS2877802

5331-01-356-1991 (MS29512-234)

NIIN: 01-356-1991
In stock
NSN: 5331-01-356-1991
FSC Code: 5331
MPN: MS29512234

5331-01-381-0071 (MS28775-213CP)

NIIN: 01-381-0071
In stock
NSN: 5331-01-381-0071
FSC Code: 5331
MPN: MS28775213CP

5331-01-507-5453 (MS28778-08)

NIIN: 01-507-5453
In stock
NSN: 5331-01-507-5453
FSC Code: 5331
MPN: MS2877808

5331-01-526-8397 (MS28775-390)

NIIN: 01-526-8397
In stock
NSN: 5331-01-526-8397
FSC Code: 5331
MPN: MS28775390

5331-01-380-9012 (MS28775-393)

NIIN: 01-380-9012
In stock
NSN: 5331-01-380-9012
FSC Code: 5331
MPN: MS28775393

5331-01-416-4001 (MS28775-440)

NIIN: 01-416-4001
In stock
NSN: 5331-01-416-4001
FSC Code: 5331
MPN: MS28775440

5331-01-518-7601 (MS28775-C12)

NIIN: 01-518-7601
In stock
NSN: 5331-01-518-7601
FSC Code: 5331
MPN: MS28775C12

5331-01-554-5871 (MS28775-209)

NIIN: 01-554-5871
In stock
NSN: 5331-01-554-5871
FSC Code: 5331
MPN: MS28775209

5331-01-420-5298 (MS28775-2)

NIIN: 01-420-5298
In stock
NSN: 5331-01-420-5298
FSC Code: 5331
MPN: MS287752

5331-01-514-1703 (MS28775-018)

NIIN: 01-514-1703
In stock
NSN: 5331-01-514-1703
FSC Code: 5331
MPN: MS28775018

5331-01-512-5270 (MS25988-3-346)

NIIN: 01-512-5270
In stock
NSN: 5331-01-512-5270
FSC Code: 5331
MPN: MS259883346

5331-01-562-3662 (MS25913-014)

NIIN: 01-562-3662
In stock
NSN: 5331-01-562-3662
FSC Code: 5331
MPN: MS25913014

5331-01-351-8656 (MS120/3)

NIIN: 01-351-8656
In stock
NSN: 5331-01-351-8656
FSC Code: 5331
MPN: MS1203

5331-01-352-1085 (MS120/4)

NIIN: 01-352-1085
In stock
NSN: 5331-01-352-1085
FSC Code: 5331
MPN: MS1204

5331-01-562-3442 (MRP21060)

NIIN: 01-562-3442
In stock
NSN: 5331-01-562-3442
FSC Code: 5331
MPN: MRP21060

5331-01-414-7174 (MPPK00150)

NIIN: 01-414-7174
In stock
NSN: 5331-01-414-7174
FSC Code: 5331
MPN: MPPK00150

5331-01-445-1449 (MP6704984-0)

NIIN: 01-445-1449
In stock
NSN: 5331-01-445-1449
FSC Code: 5331
MPN: MP67049840

5331-01-431-2061 (MPE-32-SW1/P0C0)

NIIN: 01-431-2061
In stock
NSN: 5331-01-431-2061
FSC Code: 5331
MPN: MPE32SW1P0C0

5331-01-562-0874 (MP182#12)

NIIN: 01-562-0874
In stock
NSN: 5331-01-562-0874
FSC Code: 5331
MPN: MP18212

5331-01-562-0873 (MP181#8)

NIIN: 01-562-0873
In stock
NSN: 5331-01-562-0873
FSC Code: 5331
MPN: MP1818

5331-01-510-8725 (MP011021)

NIIN: 01-510-8725
In stock
NSN: 5331-01-510-8725
FSC Code: 5331
MPN: MP011021

5331-01-510-8731 (MP011016)

NIIN: 01-510-8731
In stock
NSN: 5331-01-510-8731
FSC Code: 5331
MPN: MP011016

5331-01-551-6728 (MP011008)

NIIN: 01-551-6728
In stock
NSN: 5331-01-551-6728
FSC Code: 5331
MPN: MP011008

5331-01-551-6735 (MP011060)

NIIN: 01-551-6735
In stock
NSN: 5331-01-551-6735
FSC Code: 5331
MPN: MP011060

5331-01-398-6598 (MODEL)

NIIN: 01-398-6598
In stock
NSN: 5331-01-398-6598
FSC Code: 5331
MPN: MODEL

5331-01-398-6599 (MODEL)

NIIN: 01-398-6599
In stock
NSN: 5331-01-398-6599
FSC Code: 5331
MPN: MODEL

5331-01-398-6597 (MODEL)

NIIN: 01-398-6597
In stock
NSN: 5331-01-398-6597
FSC Code: 5331
MPN: MODEL

5331-01-479-5898 (MNL-0071)

NIIN: 01-479-5898
In stock
NSN: 5331-01-479-5898
FSC Code: 5331
MPN: MNL0071

5331-12-352-0560 (MNL-0331)

NIIN: 12-352-0560
In stock
NSN: 5331-12-352-0560
FSC Code: 5331
MPN: MNL0331

5331-01-479-5914 (MNL-0071)

NIIN: 01-479-5914
In stock
NSN: 5331-01-479-5914
FSC Code: 5331
MPN: MNL0071

5331-01-447-0058 (MMYLAR)

NIIN: 01-447-0058
In stock
NSN: 5331-01-447-0058
FSC Code: 5331
MPN: MMYLAR

5331-01-522-2531 (ML12544698G1)

NIIN: 01-522-2531
In stock
NSN: 5331-01-522-2531
FSC Code: 5331
MPN: ML12544698G1

5331-01-424-6709 (MK80-184980J-12V)

NIIN: 01-424-6709
In stock
NSN: 5331-01-424-6709
FSC Code: 5331
MPN: MK80184980J12V

5331-01-425-1568 (MK801-184980C-10)

NIIN: 01-425-1568
In stock
NSN: 5331-01-425-1568
FSC Code: 5331
MPN: MK801184980C10

5331-01-412-6062 (MIL-R-83248/1-354)

NIIN: 01-412-6062
In stock
NSN: 5331-01-412-6062
FSC Code: 5331
MPN: MILR832481354

5331-01-543-8873 (MIL-R-83248-2326-236)

NIIN: 01-543-8873
In stock
NSN: 5331-01-543-8873
FSC Code: 5331
MPN: MILR832482326236

5331-01-543-8874 (MIL-R-83248/2326-112)

NIIN: 01-543-8874
In stock
NSN: 5331-01-543-8874
FSC Code: 5331
MPN: MILR832482326112

5331-01-543-8872 (MIL-R-83248/2326-113)

NIIN: 01-543-8872
In stock
NSN: 5331-01-543-8872
FSC Code: 5331
MPN: MILR832482326113

5331-01-411-9048 (MIL-R-83248/2-212)

NIIN: 01-411-9048
In stock
NSN: 5331-01-411-9048
FSC Code: 5331
MPN: MILR832482212

5331-01-464-3102 (MIL-R-25988/3)

NIIN: 01-464-3102
In stock
NSN: 5331-01-464-3102
FSC Code: 5331
MPN: MILR259883

5331-01-546-4081 (MIL-R-25988/1)

NIIN: 01-546-4081
In stock
NSN: 5331-01-546-4081
FSC Code: 5331
MPN: MILR259881

5331-01-414-7151 (MIL-P-83461/1-146)

NIIN: 01-414-7151
In stock
NSN: 5331-01-414-7151
FSC Code: 5331
MPN: MILP834611146