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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.

5331-00-065-4823 (343902R1)

NIIN: 00-065-4823
In stock
NSN: 5331-00-065-4823
FSC Code: 5331
MPN: 343902R1

5331-01-006-5406 (343-8307)

NIIN: 01-006-5406
In stock
NSN: 5331-01-006-5406
FSC Code: 5331
MPN: 3438307

5331-01-224-8062 (3437-4.00)

NIIN: 01-224-8062
In stock
NSN: 5331-01-224-8062
FSC Code: 5331
MPN: 3437400

5331-01-277-7221 (343700R1)

NIIN: 01-277-7221
In stock
NSN: 5331-01-277-7221
FSC Code: 5331
MPN: 343700R1

5331-01-446-4370 (1-132078)

NIIN: 01-446-4370
In stock
NSN: 5331-01-446-4370
FSC Code: 5331
MPN: 1132078

5331-01-181-4119 (342-8307)

NIIN: 01-181-4119
In stock
NSN: 5331-01-181-4119
FSC Code: 5331
MPN: 3428307

5331-01-514-6355 (113-0308)

NIIN: 01-514-6355
In stock
NSN: 5331-01-514-6355
FSC Code: 5331
MPN: 1130308

5331-00-608-4648 (342-2337)

NIIN: 00-608-4648
In stock
NSN: 5331-00-608-4648
FSC Code: 5331
MPN: 3422337

5331-01-235-4324 (3423-0011-1)

NIIN: 01-235-4324
In stock
NSN: 5331-01-235-4324
FSC Code: 5331
MPN: 342300111

5331-01-500-5430 (113006-001)

NIIN: 01-500-5430
In stock
NSN: 5331-01-500-5430
FSC Code: 5331
MPN: 113006001

5331-00-502-0525 (34211-52)

NIIN: 00-502-0525
In stock
NSN: 5331-00-502-0525
FSC Code: 5331
MPN: 3421152

5331-00-502-0528 (34211-32)

NIIN: 00-502-0528
In stock
NSN: 5331-00-502-0528
FSC Code: 5331
MPN: 3421132

5331-00-469-3504 (342-106247-11)

NIIN: 00-469-3504
In stock
NSN: 5331-00-469-3504
FSC Code: 5331
MPN: 34210624711

5331-00-195-4894 (342-106247-8)

NIIN: 00-195-4894
In stock
NSN: 5331-00-195-4894
FSC Code: 5331
MPN: 3421062478

5331-00-499-0427 (342-106247-12)

NIIN: 00-499-0427
In stock
NSN: 5331-00-499-0427
FSC Code: 5331
MPN: 34210624712

5331-00-763-4385 (342-106273-7)

NIIN: 00-763-4385
In stock
NSN: 5331-00-763-4385
FSC Code: 5331
MPN: 3421062737

5331-00-415-8597 (342-106247-10)

NIIN: 00-415-8597
In stock
NSN: 5331-00-415-8597
FSC Code: 5331
MPN: 34210624710

5331-01-544-2471 (11-2X1-8-64C8)

NIIN: 01-544-2471
In stock
NSN: 5331-01-544-2471
FSC Code: 5331
MPN: 112X1864C8

5331-01-304-2361 (342-004-008)

NIIN: 01-304-2361
In stock
NSN: 5331-01-304-2361
FSC Code: 5331
MPN: 342004008

5331-01-155-1775 (341SL43)

NIIN: 01-155-1775
In stock
NSN: 5331-01-155-1775
FSC Code: 5331
MPN: 341SL43

5331-01-152-8162 (340SM)

NIIN: 01-152-8162
In stock
NSN: 5331-01-152-8162
FSC Code: 5331
MPN: 340SM

5331-01-086-6408 (34031853-001)

NIIN: 01-086-6408
In stock
NSN: 5331-01-086-6408
FSC Code: 5331
MPN: 34031853001

5331-01-503-1286 (112-8308)

NIIN: 01-503-1286
In stock
NSN: 5331-01-503-1286
FSC Code: 5331
MPN: 1128308

5331-01-539-6566 (112-8186)

NIIN: 01-539-6566
In stock
NSN: 5331-01-539-6566
FSC Code: 5331
MPN: 1128186

5331-01-039-6221 (340-0250-06)

NIIN: 01-039-6221
In stock
NSN: 5331-01-039-6221
FSC Code: 5331
MPN: 340025006

5331-01-522-3490 (11270BN)

NIIN: 01-522-3490
In stock
NSN: 5331-01-522-3490
FSC Code: 5331
MPN: 11270BN

5331-00-341-6608 (3-3V587-9)

NIIN: 00-341-6608
In stock
NSN: 5331-00-341-6608
FSC Code: 5331
MPN: 33V5879

5331-01-469-9310 (11268L001)

NIIN: 01-469-9310
In stock
NSN: 5331-01-469-9310
FSC Code: 5331
MPN: 11268L001

5331-01-359-9340 (11-254)

NIIN: 01-359-9340
In stock
NSN: 5331-01-359-9340
FSC Code: 5331
MPN: 11254

5331-00-599-0443 (33P18494-3145)

NIIN: 00-599-0443
In stock
NSN: 5331-00-599-0443
FSC Code: 5331
MPN: 33P184943145

5331-01-536-7112 (112-5282)

NIIN: 01-536-7112
In stock
NSN: 5331-01-536-7112
FSC Code: 5331
MPN: 1125282

5331-00-470-1011 (3-3N183-9)

NIIN: 00-470-1011
In stock
NSN: 5331-00-470-1011
FSC Code: 5331
MPN: 33N1839

5331-00-500-0860 (3-3N552-90)

NIIN: 00-500-0860
In stock
NSN: 5331-00-500-0860
FSC Code: 5331
MPN: 33N55290

5331-00-764-6602 (33MDW1)

NIIN: 00-764-6602
In stock
NSN: 5331-00-764-6602
FSC Code: 5331
MPN: 33MDW1

5331-00-431-1157 (33M19)

NIIN: 00-431-1157
In stock
NSN: 5331-00-431-1157
FSC Code: 5331
MPN: 33M19

5331-00-411-6465 (3-3C557-7)

NIIN: 00-411-6465
In stock
NSN: 5331-00-411-6465
FSC Code: 5331
MPN: 33C5577

5331-00-148-3950 (3-3B612-70)

NIIN: 00-148-3950
In stock
NSN: 5331-00-148-3950
FSC Code: 5331
MPN: 33B61270

5331-01-474-2233 (112-4717)

NIIN: 01-474-2233
In stock
NSN: 5331-01-474-2233
FSC Code: 5331
MPN: 1124717

5331-01-307-4225 (33A029651)

NIIN: 01-307-4225
In stock
NSN: 5331-01-307-4225
FSC Code: 5331
MPN: 33A029651

5331-01-564-9568 (112-3540)

NIIN: 01-564-9568
In stock
NSN: 5331-01-564-9568
FSC Code: 5331
MPN: 1123540

5331-01-541-2716 (112-3258)

NIIN: 01-541-2716
In stock
NSN: 5331-01-541-2716
FSC Code: 5331
MPN: 1123258

5331-01-541-2638 (112-3259)

NIIN: 01-541-2638
In stock
NSN: 5331-01-541-2638
FSC Code: 5331
MPN: 1123259

5331-01-372-3868 (11-222)

NIIN: 01-372-3868
In stock
NSN: 5331-01-372-3868
FSC Code: 5331
MPN: 11222

5331-00-070-2005 (33861-5)

NIIN: 00-070-2005
In stock
NSN: 5331-00-070-2005
FSC Code: 5331
MPN: 338615

5331-00-070-2006 (33861-22)

NIIN: 00-070-2006
In stock
NSN: 5331-00-070-2006
FSC Code: 5331
MPN: 3386122

5331-01-503-5533 (1-1212-1-03)

NIIN: 01-503-5533
In stock
NSN: 5331-01-503-5533
FSC Code: 5331
MPN: 11212103

5331-01-569-8776 (112033-908)

NIIN: 01-569-8776
In stock
NSN: 5331-01-569-8776
FSC Code: 5331
MPN: 112033908

5331-01-388-3180 (11200240-3)

NIIN: 01-388-3180
In stock
NSN: 5331-01-388-3180
FSC Code: 5331
MPN: 112002403