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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.

5331-00-135-7681 (2667646-137)

NIIN: 00-135-7681
In stock
NSN: 5331-00-135-7681
FSC Code: 5331
MPN: 2667646137

5331-01-128-8176 (2667646-139)

NIIN: 01-128-8176
In stock
NSN: 5331-01-128-8176
FSC Code: 5331
MPN: 2667646139

5331-01-219-5412 (2667646-130)

NIIN: 01-219-5412
In stock
NSN: 5331-01-219-5412
FSC Code: 5331
MPN: 2667646130

5331-01-211-0455 (2667646-143)

NIIN: 01-211-0455
In stock
NSN: 5331-01-211-0455
FSC Code: 5331
MPN: 2667646143

5331-01-128-8175 (2667646-138)

NIIN: 01-128-8175
In stock
NSN: 5331-01-128-8175
FSC Code: 5331
MPN: 2667646138

5331-01-131-0754 (2667646-114)

NIIN: 01-131-0754
In stock
NSN: 5331-01-131-0754
FSC Code: 5331
MPN: 2667646114

5331-01-128-8174 (2667646-135)

NIIN: 01-128-8174
In stock
NSN: 5331-01-128-8174
FSC Code: 5331
MPN: 2667646135

5331-01-129-5119 (2667646-128)

NIIN: 01-129-5119
In stock
NSN: 5331-01-129-5119
FSC Code: 5331
MPN: 2667646128

5331-01-131-0753 (2667646-113)

NIIN: 01-131-0753
In stock
NSN: 5331-01-131-0753
FSC Code: 5331
MPN: 2667646113

5331-01-129-5120 (2667646-129)

NIIN: 01-129-5120
In stock
NSN: 5331-01-129-5120
FSC Code: 5331
MPN: 2667646129

5331-01-211-0453 (2667646-126)

NIIN: 01-211-0453
In stock
NSN: 5331-01-211-0453
FSC Code: 5331
MPN: 2667646126

5331-01-129-1620 (2667646-11)

NIIN: 01-129-1620
In stock
NSN: 5331-01-129-1620
FSC Code: 5331
MPN: 266764611

5331-00-938-6846 (2667646-124)

NIIN: 00-938-6846
In stock
NSN: 5331-00-938-6846
FSC Code: 5331
MPN: 2667646124

5331-01-213-6757 (2666C)

NIIN: 01-213-6757
In stock
NSN: 5331-01-213-6757
FSC Code: 5331
MPN: 2666C

5331-01-296-6445 (2666G)

NIIN: 01-296-6445
In stock
NSN: 5331-01-296-6445
FSC Code: 5331
MPN: 2666G

5331-01-312-7152 (2666A)

NIIN: 01-312-7152
In stock
NSN: 5331-01-312-7152
FSC Code: 5331
MPN: 2666A

5331-01-223-1068 (2666851-9)

NIIN: 01-223-1068
In stock
NSN: 5331-01-223-1068
FSC Code: 5331
MPN: 26668519

5331-01-220-3364 (2666851-7)

NIIN: 01-220-3364
In stock
NSN: 5331-01-220-3364
FSC Code: 5331
MPN: 26668517

5331-01-220-3380 (2666851-10)

NIIN: 01-220-3380
In stock
NSN: 5331-01-220-3380
FSC Code: 5331
MPN: 266685110

5331-01-285-2596 (2666851-11)

NIIN: 01-285-2596
In stock
NSN: 5331-01-285-2596
FSC Code: 5331
MPN: 266685111

5331-01-222-9458 (2666851-5)

NIIN: 01-222-9458
In stock
NSN: 5331-01-222-9458
FSC Code: 5331
MPN: 26668515

5331-01-220-3368 (2666850-8)

NIIN: 01-220-3368
In stock
NSN: 5331-01-220-3368
FSC Code: 5331
MPN: 26668508

5331-01-222-1645 (2666850-9)

NIIN: 01-222-1645
In stock
NSN: 5331-01-222-1645
FSC Code: 5331
MPN: 26668509

5331-01-220-3359 (2666850-27)

NIIN: 01-220-3359
In stock
NSN: 5331-01-220-3359
FSC Code: 5331
MPN: 266685027

5331-01-220-3372 (2666850-41)

NIIN: 01-220-3372
In stock
NSN: 5331-01-220-3372
FSC Code: 5331
MPN: 266685041

5331-01-222-1644 (2666850-7)

NIIN: 01-222-1644
In stock
NSN: 5331-01-222-1644
FSC Code: 5331
MPN: 26668507

5331-01-220-3366 (2666850-37)

NIIN: 01-220-3366
In stock
NSN: 5331-01-220-3366
FSC Code: 5331
MPN: 266685037

5331-01-220-3363 (2666850-28)

NIIN: 01-220-3363
In stock
NSN: 5331-01-220-3363
FSC Code: 5331
MPN: 266685028

5331-01-223-2081 (2666850-31)

NIIN: 01-223-2081
In stock
NSN: 5331-01-223-2081
FSC Code: 5331
MPN: 266685031

5331-01-222-1642 (2666850-32)

NIIN: 01-222-1642
In stock
NSN: 5331-01-222-1642
FSC Code: 5331
MPN: 266685032

5331-01-222-1639 (2666850-25)

NIIN: 01-222-1639
In stock
NSN: 5331-01-222-1639
FSC Code: 5331
MPN: 266685025

5331-01-221-9214 (2666850-18)

NIIN: 01-221-9214
In stock
NSN: 5331-01-221-9214
FSC Code: 5331
MPN: 266685018

5331-01-219-9076 (2666850-29)

NIIN: 01-219-9076
In stock
NSN: 5331-01-219-9076
FSC Code: 5331
MPN: 266685029

5331-01-220-3378 (2666850-20)

NIIN: 01-220-3378
In stock
NSN: 5331-01-220-3378
FSC Code: 5331
MPN: 266685020

5331-01-221-7507 (2666850-26)

NIIN: 01-221-7507
In stock
NSN: 5331-01-221-7507
FSC Code: 5331
MPN: 266685026

5331-01-221-9211 (2666850-21)

NIIN: 01-221-9211
In stock
NSN: 5331-01-221-9211
FSC Code: 5331
MPN: 266685021

5331-01-223-1076 (2666850-15)

NIIN: 01-223-1076
In stock
NSN: 5331-01-223-1076
FSC Code: 5331
MPN: 266685015

5331-01-219-9071 (2666850-22)

NIIN: 01-219-9071
In stock
NSN: 5331-01-219-9071
FSC Code: 5331
MPN: 266685022

5331-01-220-3377 (2666850-23)

NIIN: 01-220-3377
In stock
NSN: 5331-01-220-3377
FSC Code: 5331
MPN: 266685023

5331-01-220-3375 (2666850-19)

NIIN: 01-220-3375
In stock
NSN: 5331-01-220-3375
FSC Code: 5331
MPN: 266685019

5331-01-223-1073 (2666850-16)

NIIN: 01-223-1073
In stock
NSN: 5331-01-223-1073
FSC Code: 5331
MPN: 266685016

5331-01-284-1279 (2666850-149)

NIIN: 01-284-1279
In stock
NSN: 5331-01-284-1279
FSC Code: 5331
MPN: 2666850149

5331-01-222-1646 (2666850-139)

NIIN: 01-222-1646
In stock
NSN: 5331-01-222-1646
FSC Code: 5331
MPN: 2666850139

5331-01-223-1071 (2666850-140)

NIIN: 01-223-1071
In stock
NSN: 5331-01-223-1071
FSC Code: 5331
MPN: 2666850140

5331-01-220-3362 (2666850-134)

NIIN: 01-220-3362
In stock
NSN: 5331-01-220-3362
FSC Code: 5331
MPN: 2666850134

5331-01-220-3367 (2666850-136)

NIIN: 01-220-3367
In stock
NSN: 5331-01-220-3367
FSC Code: 5331
MPN: 2666850136

5331-01-223-1069 (2666850-129)

NIIN: 01-223-1069
In stock
NSN: 5331-01-223-1069
FSC Code: 5331
MPN: 2666850129

5331-01-221-9212 (2666850-130)

NIIN: 01-221-9212
In stock
NSN: 5331-01-221-9212
FSC Code: 5331
MPN: 2666850130