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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.

5331-01-442-8713 (4401002-0170)

NIIN: 01-442-8713
In stock
NSN: 5331-01-442-8713
FSC Code: 5331
MPN: 44010020170

5331-01-560-3521 (284051-0012ITEM62)

NIIN: 01-560-3521
In stock
NSN: 5331-01-560-3521
FSC Code: 5331
MPN: 2840510012ITEM62

5331-01-518-0486 (M83248/2-122CP)

NIIN: 01-518-0486
In stock
NSN: 5331-01-518-0486
FSC Code: 5331
MPN: M832482122CP

5331-01-560-1981 (284051-0015ITEM63)

NIIN: 01-560-1981
In stock
NSN: 5331-01-560-1981
FSC Code: 5331
MPN: 2840510015ITEM63

5331-01-560-1975 (284051-0014P/OITEM1)

NIIN: 01-560-1975
In stock
NSN: 5331-01-560-1975
FSC Code: 5331
MPN: 2840510014POITEM1

5331-01-560-1978 (284051-0015ITEM62)

NIIN: 01-560-1978
In stock
NSN: 5331-01-560-1978
FSC Code: 5331
MPN: 2840510015ITEM62

5331-01-560-1974 (284051-0015ITEM61)

NIIN: 01-560-1974
In stock
NSN: 5331-01-560-1974
FSC Code: 5331
MPN: 2840510015ITEM61

5331-01-560-3524 (284051-0012ITEM61)

NIIN: 01-560-3524
In stock
NSN: 5331-01-560-3524
FSC Code: 5331
MPN: 2840510012ITEM61

5331-01-285-3941 (66400-211)

NIIN: 01-285-3941
In stock
NSN: 5331-01-285-3941
FSC Code: 5331
MPN: 66400211

5331-01-371-2380 (283854-0001-64)

NIIN: 01-371-2380
In stock
NSN: 5331-01-371-2380
FSC Code: 5331
MPN: 283854000164

5331-01-371-2377 (283854-0001-61)

NIIN: 01-371-2377
In stock
NSN: 5331-01-371-2377
FSC Code: 5331
MPN: 283854000161

5331-01-371-2378 (283854-0001-62)

NIIN: 01-371-2378
In stock
NSN: 5331-01-371-2378
FSC Code: 5331
MPN: 283854000162

5331-01-371-2379 (283854-0001-63)

NIIN: 01-371-2379
In stock
NSN: 5331-01-371-2379
FSC Code: 5331
MPN: 283854000163

5331-01-462-3440 (4400171-0060)

NIIN: 01-462-3440
In stock
NSN: 5331-01-462-3440
FSC Code: 5331
MPN: 44001710060

5331-01-351-2744 (283664-0001-67)

NIIN: 01-351-2744
In stock
NSN: 5331-01-351-2744
FSC Code: 5331
MPN: 283664000167

5331-01-351-2743 (283664-0001-61)

NIIN: 01-351-2743
In stock
NSN: 5331-01-351-2743
FSC Code: 5331
MPN: 283664000161

5331-01-231-4490 (663700-9)

NIIN: 01-231-4490
In stock
NSN: 5331-01-231-4490
FSC Code: 5331
MPN: 6637009

5331-01-223-4323 (663700-7)

NIIN: 01-223-4323
In stock
NSN: 5331-01-223-4323
FSC Code: 5331
MPN: 6637007

5331-00-411-4349 (663700-141)

NIIN: 00-411-4349
In stock
NSN: 5331-00-411-4349
FSC Code: 5331
MPN: 663700141

5331-01-020-5273 (663700-3)

NIIN: 01-020-5273
In stock
NSN: 5331-01-020-5273
FSC Code: 5331
MPN: 6637003

5331-01-245-8787 (663700-128)

NIIN: 01-245-8787
In stock
NSN: 5331-01-245-8787
FSC Code: 5331
MPN: 663700128

5331-01-022-5500 (663700-14)

NIIN: 01-022-5500
In stock
NSN: 5331-01-022-5500
FSC Code: 5331
MPN: 66370014

5331-01-285-2219 (663700-4)

NIIN: 01-285-2219
In stock
NSN: 5331-01-285-2219
FSC Code: 5331
MPN: 6637004

5331-01-230-1765 (663700-26)

NIIN: 01-230-1765
In stock
NSN: 5331-01-230-1765
FSC Code: 5331
MPN: 66370026

5331-01-218-9818 (663700-156)

NIIN: 01-218-9818
In stock
NSN: 5331-01-218-9818
FSC Code: 5331
MPN: 663700156

5331-01-197-0887 (663700-136)

NIIN: 01-197-0887
In stock
NSN: 5331-01-197-0887
FSC Code: 5331
MPN: 663700136

5331-01-438-7416 (M83248/1-116CP)

NIIN: 01-438-7416
In stock
NSN: 5331-01-438-7416
FSC Code: 5331
MPN: M832481116CP

5331-01-159-8368 (663-6134)

NIIN: 01-159-8368
In stock
NSN: 5331-01-159-8368
FSC Code: 5331
MPN: 6636134

5331-01-438-4595 (4410591-9040CPCP)

NIIN: 01-438-4595
In stock
NSN: 5331-01-438-4595
FSC Code: 5331
MPN: 44105919040CPCP

5331-01-243-5144 (663700-133)

NIIN: 01-243-5144
In stock
NSN: 5331-01-243-5144
FSC Code: 5331
MPN: 663700133

5331-01-444-6245 (4400591-1300CP)

NIIN: 01-444-6245
In stock
NSN: 5331-01-444-6245
FSC Code: 5331
MPN: 44005911300CP

5331-00-171-2222 (663700-117)

NIIN: 00-171-2222
In stock
NSN: 5331-00-171-2222
FSC Code: 5331
MPN: 663700117

5331-01-438-7519 (AS568-012MILR25897CL2CP)

NIIN: 01-438-7519
In stock
NSN: 5331-01-438-7519
FSC Code: 5331
MPN: AS568012MILR25897CL2CP

5331-00-901-8272 (663700-120)

NIIN: 00-901-8272
In stock
NSN: 5331-00-901-8272
FSC Code: 5331
MPN: 663700120

5331-00-787-2159 (663700-126)

NIIN: 00-787-2159
In stock
NSN: 5331-00-787-2159
FSC Code: 5331
MPN: 663700126

5331-01-438-7429 (M83248/1-005CP)

NIIN: 01-438-7429
In stock
NSN: 5331-01-438-7429
FSC Code: 5331
MPN: M832481005CP

5331-01-438-4596 (4400591-2100CP)

NIIN: 01-438-4596
In stock
NSN: 5331-01-438-4596
FSC Code: 5331
MPN: 44005912100CP

5331-01-233-4578 (663700-111)

NIIN: 01-233-4578
In stock
NSN: 5331-01-233-4578
FSC Code: 5331
MPN: 663700111

5331-01-438-7474 (M83248/1-117CP)

NIIN: 01-438-7474
In stock
NSN: 5331-01-438-7474
FSC Code: 5331
MPN: M832481117CP

5331-01-529-7299 (283-27)

NIIN: 01-529-7299
In stock
NSN: 5331-01-529-7299
FSC Code: 5331
MPN: 28327

5331-01-115-8728 (663-6110)

NIIN: 01-115-8728
In stock
NSN: 5331-01-115-8728
FSC Code: 5331
MPN: 6636110

5331-01-385-1678 (4400173-1230)

NIIN: 01-385-1678
In stock
NSN: 5331-01-385-1678
FSC Code: 5331
MPN: 44001731230

5331-01-384-1357 (4400173-4330)

NIIN: 01-384-1357
In stock
NSN: 5331-01-384-1357
FSC Code: 5331
MPN: 44001734330

5331-00-930-7118 (663216-6)

NIIN: 00-930-7118
In stock
NSN: 5331-00-930-7118
FSC Code: 5331
MPN: 6632166

5331-01-527-0242 (283020-000)

NIIN: 01-527-0242
In stock
NSN: 5331-01-527-0242
FSC Code: 5331
MPN: 283020000

5331-01-532-1529 (283002-000)

NIIN: 01-532-1529
In stock
NSN: 5331-01-532-1529
FSC Code: 5331
MPN: 283002000

5331-99-547-9810 (2829/A/1INS./6)

NIIN: 99-547-9810
In stock
NSN: 5331-99-547-9810
FSC Code: 5331
MPN: 2829A1INS6

5331-99-500-3948 (2829/A/3/4INS/6)

NIIN: 99-500-3948
In stock
NSN: 5331-99-500-3948
FSC Code: 5331
MPN: 2829A34INS6