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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.

5331-01-095-3863 (A4540R)

NIIN: 01-095-3863
In stock
NSN: 5331-01-095-3863
FSC Code: 5331
MPN: A4540R

5331-01-542-9194 (5-575)

NIIN: 01-542-9194
In stock
NSN: 5331-01-542-9194
FSC Code: 5331
MPN: 5575

5331-01-287-2829 (A449769-15MZZ)

NIIN: 01-287-2829
In stock
NSN: 5331-01-287-2829
FSC Code: 5331
MPN: A44976915MZZ

5331-01-416-2603 (5-567)

NIIN: 01-416-2603
In stock
NSN: 5331-01-416-2603
FSC Code: 5331
MPN: 5567

5331-01-023-2350 (A42-7)

NIIN: 01-023-2350
In stock
NSN: 5331-01-023-2350
FSC Code: 5331
MPN: A427

5331-01-435-5805 (5-565E1157-60)

NIIN: 01-435-5805
In stock
NSN: 5331-01-435-5805
FSC Code: 5331
MPN: 5565E115760

5331-01-425-9881 (5-563N756-75)

NIIN: 01-425-9881
In stock
NSN: 5331-01-425-9881
FSC Code: 5331
MPN: 5563N75675

5331-01-507-5450 (5-563V747-75)

NIIN: 01-507-5450
In stock
NSN: 5331-01-507-5450
FSC Code: 5331
MPN: 5563V74775

5331-01-507-5444 (5-563E515-80)

NIIN: 01-507-5444
In stock
NSN: 5331-01-507-5444
FSC Code: 5331
MPN: 5563E51580

5331-01-490-0767 (55620-00)

NIIN: 01-490-0767
In stock
NSN: 5331-01-490-0767
FSC Code: 5331
MPN: 5562000

5331-00-988-0449 (A41N101-5)

NIIN: 00-988-0449
In stock
NSN: 5331-00-988-0449
FSC Code: 5331
MPN: A41N1015

5331-00-878-2379 (A416743-1)

NIIN: 00-878-2379
In stock
NSN: 5331-00-878-2379
FSC Code: 5331
MPN: A4167431

5331-00-435-4725 (A4150-1-058)

NIIN: 00-435-4725
In stock
NSN: 5331-00-435-4725
FSC Code: 5331
MPN: A41501058

5331-01-088-7355 (A41346)

NIIN: 01-088-7355
In stock
NSN: 5331-01-088-7355
FSC Code: 5331
MPN: A41346

5331-00-967-4727 (A411L)

NIIN: 00-967-4727
In stock
NSN: 5331-00-967-4727
FSC Code: 5331
MPN: A411L

5331-00-070-2041 (A411H)

NIIN: 00-070-2041
In stock
NSN: 5331-00-070-2041
FSC Code: 5331
MPN: A411H

5331-00-967-4728 (A411M)

NIIN: 00-967-4728
In stock
NSN: 5331-00-967-4728
FSC Code: 5331
MPN: A411M

5331-01-218-1193 (A40318)

NIIN: 01-218-1193
In stock
NSN: 5331-01-218-1193
FSC Code: 5331
MPN: A40318

5331-01-103-7788 (A40346)

NIIN: 01-103-7788
In stock
NSN: 5331-01-103-7788
FSC Code: 5331
MPN: A40346

5331-01-219-5325 (A-4000-620)

NIIN: 01-219-5325
In stock
NSN: 5331-01-219-5325
FSC Code: 5331
MPN: A4000620

5331-00-421-4874 (A395X18)

NIIN: 00-421-4874
In stock
NSN: 5331-00-421-4874
FSC Code: 5331
MPN: A395X18

5331-00-864-5742 (A395X48)

NIIN: 00-864-5742
In stock
NSN: 5331-00-864-5742
FSC Code: 5331
MPN: A395X48

5331-01-421-6086 (5545-1)

NIIN: 01-421-6086
In stock
NSN: 5331-01-421-6086
FSC Code: 5331
MPN: 55451

5331-01-195-1510 (A3917A)

NIIN: 01-195-1510
In stock
NSN: 5331-01-195-1510
FSC Code: 5331
MPN: A3917A

5331-01-421-6084 (5543-1)

NIIN: 01-421-6084
In stock
NSN: 5331-01-421-6084
FSC Code: 5331
MPN: 55431

5331-00-986-0236 (A387)

NIIN: 00-986-0236
In stock
NSN: 5331-00-986-0236
FSC Code: 5331
MPN: A387

5331-00-860-2567 (A37029)

NIIN: 00-860-2567
In stock
NSN: 5331-00-860-2567
FSC Code: 5331
MPN: A37029

5331-00-860-2563 (A36838)

NIIN: 00-860-2563
In stock
NSN: 5331-00-860-2563
FSC Code: 5331
MPN: A36838

5331-00-155-4776 (A35965)

NIIN: 00-155-4776
In stock
NSN: 5331-00-155-4776
FSC Code: 5331
MPN: A35965

5331-01-317-5227 (A356A317-101)

NIIN: 01-317-5227
In stock
NSN: 5331-01-317-5227
FSC Code: 5331
MPN: A356A317101

5331-01-372-3533 (J005526-220)

NIIN: 01-372-3533
In stock
NSN: 5331-01-372-3533
FSC Code: 5331
MPN: J005526220

5331-01-432-9646 (5526-222)

NIIN: 01-432-9646
In stock
NSN: 5331-01-432-9646
FSC Code: 5331
MPN: 5526222

5331-01-379-8228 (5526-214)

NIIN: 01-379-8228
In stock
NSN: 5331-01-379-8228
FSC Code: 5331
MPN: 5526214

5331-01-378-6833 (5526-119)

NIIN: 01-378-6833
In stock
NSN: 5331-01-378-6833
FSC Code: 5331
MPN: 5526119

5331-01-372-3875 (5526-125)

NIIN: 01-372-3875
In stock
NSN: 5331-01-372-3875
FSC Code: 5331
MPN: 5526125

5331-01-372-3532 (5526-113)

NIIN: 01-372-3532
In stock
NSN: 5331-01-372-3532
FSC Code: 5331
MPN: 5526113

5331-01-227-9872 (A356A044-101)

NIIN: 01-227-9872
In stock
NSN: 5331-01-227-9872
FSC Code: 5331
MPN: A356A044101

5331-00-860-2552 (A35492)

NIIN: 00-860-2552
In stock
NSN: 5331-00-860-2552
FSC Code: 5331
MPN: A35492

5331-01-125-1099 (A34WR1-4)

NIIN: 01-125-1099
In stock
NSN: 5331-01-125-1099
FSC Code: 5331
MPN: A34WR14

5331-01-346-3808 (5520438-1)

NIIN: 01-346-3808
In stock
NSN: 5331-01-346-3808
FSC Code: 5331
MPN: 55204381

5331-01-546-1951 (55200-064946)

NIIN: 01-546-1951
In stock
NSN: 5331-01-546-1951
FSC Code: 5331
MPN: 55200064946

5331-01-535-6116 (551A-11)

NIIN: 01-535-6116
In stock
NSN: 5331-01-535-6116
FSC Code: 5331
MPN: 551A11

5331-01-470-2127 (551-6685219-9)

NIIN: 01-470-2127
In stock
NSN: 5331-01-470-2127
FSC Code: 5331
MPN: 55166852199

5331-01-124-6392 (A337-EDITEMG5)

NIIN: 01-124-6392
In stock
NSN: 5331-01-124-6392
FSC Code: 5331
MPN: A337EDITEMG5

5331-01-513-2351 (5-508N674-70)

NIIN: 01-513-2351
In stock
NSN: 5331-01-513-2351
FSC Code: 5331
MPN: 5508N67470

5331-99-245-1124 (5505-4301)

NIIN: 99-245-1124
In stock
NSN: 5331-99-245-1124
FSC Code: 5331
MPN: 55054301

5331-99-700-8207 (5505-4301)

NIIN: 99-700-8207
In stock
NSN: 5331-99-700-8207
FSC Code: 5331
MPN: 55054301

5331-12-344-6600 (055002 700429055002)

NIIN: 12-344-6600
In stock
NSN: 5331-12-344-6600
FSC Code: 5331
MPN: 055002700429055002