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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.

5331-01-394-9335 (STO36734)

NIIN: 01-394-9335
In stock
NSN: 5331-01-394-9335
FSC Code: 5331
MPN: STO36734

5331-01-555-9275 (STM2655)

NIIN: 01-555-9275
In stock
NSN: 5331-01-555-9275
FSC Code: 5331
MPN: STM2655

5331-01-555-9285 (STM1005)

NIIN: 01-555-9285
In stock
NSN: 5331-01-555-9285
FSC Code: 5331
MPN: STM1005

5331-01-352-3181 (STK750006135)

NIIN: 01-352-3181
In stock
NSN: 5331-01-352-3181
FSC Code: 5331
MPN: STK750006135

5331-01-395-1942 (STD3000E13)

NIIN: 01-395-1942
In stock
NSN: 5331-01-395-1942
FSC Code: 5331
MPN: STD3000E13

5331-01-351-8653 (STD1216-4120)

NIIN: 01-351-8653
In stock
NSN: 5331-01-351-8653
FSC Code: 5331
MPN: STD12164120

5331-01-550-0012 (ST700-67)

NIIN: 01-550-0012
In stock
NSN: 5331-01-550-0012
FSC Code: 5331
MPN: ST70067

5331-01-463-1546 (ST0-6.0-51-05-3-0)

NIIN: 01-463-1546
In stock
NSN: 5331-01-463-1546
FSC Code: 5331
MPN: ST060510530

5331-01-346-1478 (SX-20210305-01)

NIIN: 01-346-1478
In stock
NSN: 5331-01-346-1478
FSC Code: 5331
MPN: SX2021030501

5331-01-415-5278 (ST524Z10M)

NIIN: 01-415-5278
In stock
NSN: 5331-01-415-5278
FSC Code: 5331
MPN: ST524Z10M

5331-01-340-3909 (ST511Z18BMIL)

NIIN: 01-340-3909
In stock
NSN: 5331-01-340-3909
FSC Code: 5331
MPN: ST511Z18BMIL

5331-01-463-1529 (ST0-4.0-51-05-3-0)

NIIN: 01-463-1529
In stock
NSN: 5331-01-463-1529
FSC Code: 5331
MPN: ST040510530

5331-01-485-6011 (ST2283-167)

NIIN: 01-485-6011
In stock
NSN: 5331-01-485-6011
FSC Code: 5331
MPN: ST2283167

5331-01-485-6019 (ST2283-178)

NIIN: 01-485-6019
In stock
NSN: 5331-01-485-6019
FSC Code: 5331
MPN: ST2283178

5331-01-485-6053 (ST2283-021)

NIIN: 01-485-6053
In stock
NSN: 5331-01-485-6053
FSC Code: 5331
MPN: ST2283021

5331-01-485-6016 (ST2283-116)

NIIN: 01-485-6016
In stock
NSN: 5331-01-485-6016
FSC Code: 5331
MPN: ST2283116

5331-01-486-1854 (ST2283-153)

NIIN: 01-486-1854
In stock
NSN: 5331-01-486-1854
FSC Code: 5331
MPN: ST2283153

5331-01-485-6007 (ST2283-012)

NIIN: 01-485-6007
In stock
NSN: 5331-01-485-6007
FSC Code: 5331
MPN: ST2283012

5331-01-485-6100 (ST2283-010)

NIIN: 01-485-6100
In stock
NSN: 5331-01-485-6100
FSC Code: 5331
MPN: ST2283010

5331-01-485-6008 (ST2283-014)

NIIN: 01-485-6008
In stock
NSN: 5331-01-485-6008
FSC Code: 5331
MPN: ST2283014

5331-01-485-6041 (ST2283-111)

NIIN: 01-485-6041
In stock
NSN: 5331-01-485-6041
FSC Code: 5331
MPN: ST2283111

5331-01-485-6046 (ST2283-152)

NIIN: 01-485-6046
In stock
NSN: 5331-01-485-6046
FSC Code: 5331
MPN: ST2283152

5331-01-464-8577 (ST1050-235)

NIIN: 01-464-8577
In stock
NSN: 5331-01-464-8577
FSC Code: 5331
MPN: ST1050235

5331-01-464-8595 (ST1051-04)

NIIN: 01-464-8595
In stock
NSN: 5331-01-464-8595
FSC Code: 5331
MPN: ST105104

5331-01-464-8603 (ST1050-178)

NIIN: 01-464-8603
In stock
NSN: 5331-01-464-8603
FSC Code: 5331
MPN: ST1050178

5331-01-464-8598 (ST1050-215)

NIIN: 01-464-8598
In stock
NSN: 5331-01-464-8598
FSC Code: 5331
MPN: ST1050215

5331-01-464-8597 (ST1050-0243)

NIIN: 01-464-8597
In stock
NSN: 5331-01-464-8597
FSC Code: 5331
MPN: ST10500243

5331-01-483-8642 (ST1050-004)

NIIN: 01-483-8642
In stock
NSN: 5331-01-483-8642
FSC Code: 5331
MPN: ST1050004

5331-01-464-8572 (ST1000-164)

NIIN: 01-464-8572
In stock
NSN: 5331-01-464-8572
FSC Code: 5331
MPN: ST1000164

5331-01-464-8588 (ST1051-12)

NIIN: 01-464-8588
In stock
NSN: 5331-01-464-8588
FSC Code: 5331
MPN: ST105112

5331-01-483-8644 (ST1051-03)

NIIN: 01-483-8644
In stock
NSN: 5331-01-483-8644
FSC Code: 5331
MPN: ST105103

5331-01-483-8641 (ST1050-035)

NIIN: 01-483-8641
In stock
NSN: 5331-01-483-8641
FSC Code: 5331
MPN: ST1050035

5331-01-483-8645 (ST1050-211)

NIIN: 01-483-8645
In stock
NSN: 5331-01-483-8645
FSC Code: 5331
MPN: ST1050211

5331-01-464-8608 (ST1050-008)

NIIN: 01-464-8608
In stock
NSN: 5331-01-464-8608
FSC Code: 5331
MPN: ST1050008

5331-01-460-0452 (ST1050-230)

NIIN: 01-460-0452
In stock
NSN: 5331-01-460-0452
FSC Code: 5331
MPN: ST1050230

5331-01-464-8616 (ST1000-213)

NIIN: 01-464-8616
In stock
NSN: 5331-01-464-8616
FSC Code: 5331
MPN: ST1000213

5331-01-464-8557 (ST1000-154)

NIIN: 01-464-8557
In stock
NSN: 5331-01-464-8557
FSC Code: 5331
MPN: ST1000154

5331-01-464-8574 (ST1001-06)

NIIN: 01-464-8574
In stock
NSN: 5331-01-464-8574
FSC Code: 5331
MPN: ST100106

5331-01-464-8573 (ST1000-256)

NIIN: 01-464-8573
In stock
NSN: 5331-01-464-8573
FSC Code: 5331
MPN: ST1000256

5331-01-464-8571 (ST1000-209)

NIIN: 01-464-8571
In stock
NSN: 5331-01-464-8571
FSC Code: 5331
MPN: ST1000209

5331-01-561-6586 (ST072015BF10A)

NIIN: 01-561-6586
In stock
NSN: 5331-01-561-6586
FSC Code: 5331
MPN: ST072015BF10A

5331-01-464-8556 (ST1000-153)

NIIN: 01-464-8556
In stock
NSN: 5331-01-464-8556
FSC Code: 5331
MPN: ST1000153

5331-01-464-8567 (ST1000-131)

NIIN: 01-464-8567
In stock
NSN: 5331-01-464-8567
FSC Code: 5331
MPN: ST1000131

5331-01-464-8551 (ST1000-128)

NIIN: 01-464-8551
In stock
NSN: 5331-01-464-8551
FSC Code: 5331
MPN: ST1000128

5331-01-535-2092 (ST1000-132)

NIIN: 01-535-2092
In stock
NSN: 5331-01-535-2092
FSC Code: 5331
MPN: ST1000132

5331-01-464-8550 (ST1000-152)

NIIN: 01-464-8550
In stock
NSN: 5331-01-464-8550
FSC Code: 5331
MPN: ST1000152

5331-01-464-8555 (ST1000-150)

NIIN: 01-464-8555
In stock
NSN: 5331-01-464-8555
FSC Code: 5331
MPN: ST1000150

5331-01-464-8566 (ST1000-112)

NIIN: 01-464-8566
In stock
NSN: 5331-01-464-8566
FSC Code: 5331
MPN: ST1000112