Skip to content

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.

5331-01-447-9658 (79MZ343X)

NIIN: 01-447-9658
In stock
NSN: 5331-01-447-9658
FSC Code: 5331
MPN: 79MZ343X

5331-01-412-8729 (79K20)

NIIN: 01-412-8729
In stock
NSN: 5331-01-412-8729
FSC Code: 5331
MPN: 79K20

5331-01-420-8870 (79K6)

NIIN: 01-420-8870
In stock
NSN: 5331-01-420-8870
FSC Code: 5331
MPN: 79K6

5331-01-412-9862 (79K12)

NIIN: 01-412-9862
In stock
NSN: 5331-01-412-9862
FSC Code: 5331
MPN: 79K12

5331-01-486-2197 (79K4)

NIIN: 01-486-2197
In stock
NSN: 5331-01-486-2197
FSC Code: 5331
MPN: 79K4

5331-01-480-0570 (79K000010B)

NIIN: 01-480-0570
In stock
NSN: 5331-01-480-0570
FSC Code: 5331
MPN: 79K000010B

5331-01-412-9855 (79K000016)

NIIN: 01-412-9855
In stock
NSN: 5331-01-412-9855
FSC Code: 5331
MPN: 79K000016

5331-01-526-2340 (853-09582-000)

NIIN: 01-526-2340
In stock
NSN: 5331-01-526-2340
FSC Code: 5331
MPN: 85309582000

5331-01-526-2298 (853-09586-000)

NIIN: 01-526-2298
In stock
NSN: 5331-01-526-2298
FSC Code: 5331
MPN: 85309586000

5331-01-526-2460 (853-09584-000)

NIIN: 01-526-2460
In stock
NSN: 5331-01-526-2460
FSC Code: 5331
MPN: 85309584000

5331-01-526-2389 (853-09324-000)

NIIN: 01-526-2389
In stock
NSN: 5331-01-526-2389
FSC Code: 5331
MPN: 85309324000

5331-01-534-2984 (79979W)

NIIN: 01-534-2984
In stock
NSN: 5331-01-534-2984
FSC Code: 5331
MPN: 79979W

5331-99-650-0738 (BSISO3601-1SIZE026NBR.70)

NIIN: 99-650-0738
In stock
NSN: 5331-99-650-0738
FSC Code: 5331
MPN: BSISO36011SIZE026NBR70

5331-99-762-1771 (7980-1354-225)

NIIN: 99-762-1771
In stock
NSN: 5331-99-762-1771
FSC Code: 5331
MPN: 79801354225

5331-01-567-2003 (7978-10)

NIIN: 01-567-2003
In stock
NSN: 5331-01-567-2003
FSC Code: 5331
MPN: 797810

5331-01-435-8030 (79650-10-1)

NIIN: 01-435-8030
In stock
NSN: 5331-01-435-8030
FSC Code: 5331
MPN: 79650101

5331-01-354-2390 (7960005-00)

NIIN: 01-354-2390
In stock
NSN: 5331-01-354-2390
FSC Code: 5331
MPN: 796000500

5331-99-764-4838 (7960-0353)

NIIN: 99-764-4838
In stock
NSN: 5331-99-764-4838
FSC Code: 5331
MPN: 79600353

5331-99-471-2968 (7960-0453)

NIIN: 99-471-2968
In stock
NSN: 5331-99-471-2968
FSC Code: 5331
MPN: 79600453

5331-99-125-7818 (7960-0203)

NIIN: 99-125-7818
In stock
NSN: 5331-99-125-7818
FSC Code: 5331
MPN: 79600203

5331-01-354-7660 (7960019-00)

NIIN: 01-354-7660
In stock
NSN: 5331-01-354-7660
FSC Code: 5331
MPN: 796001900

5331-01-287-8820 (HT-15210)

NIIN: 01-287-8820
In stock
NSN: 5331-01-287-8820
FSC Code: 5331
MPN: HT15210

5331-01-287-8819 (HT-15210)

NIIN: 01-287-8819
In stock
NSN: 5331-01-287-8819
FSC Code: 5331
MPN: HT15210

5331-01-498-2924 (794444-1(S))

NIIN: 01-498-2924
In stock
NSN: 5331-01-498-2924
FSC Code: 5331
MPN: 7944441S

5331-01-019-5838 (HS232-9-246)

NIIN: 01-019-5838
In stock
NSN: 5331-01-019-5838
FSC Code: 5331
MPN: HS2329246

5331-00-576-9577 (HS231IG230)

NIIN: 00-576-9577
In stock
NSN: 5331-00-576-9577
FSC Code: 5331
MPN: HS231IG230

5331-01-274-5603 (HS-3)

NIIN: 01-274-5603
In stock
NSN: 5331-01-274-5603
FSC Code: 5331
MPN: HS3

5331-00-576-8130 (HS227Z1)

NIIN: 00-576-8130
In stock
NSN: 5331-00-576-8130
FSC Code: 5331
MPN: HS227Z1

5331-00-297-6040 (HS230Z2)

NIIN: 00-297-6040
In stock
NSN: 5331-00-297-6040
FSC Code: 5331
MPN: HS230Z2

5331-00-599-2823 (HS232-9-018)

NIIN: 00-599-2823
In stock
NSN: 5331-00-599-2823
FSC Code: 5331
MPN: HS2329018

5331-00-794-7069 (HS232-3A012)

NIIN: 00-794-7069
In stock
NSN: 5331-00-794-7069
FSC Code: 5331
MPN: HS2323A012

5331-00-684-3407 (HS227Z5)

NIIN: 00-684-3407
In stock
NSN: 5331-00-684-3407
FSC Code: 5331
MPN: HS227Z5

5331-00-141-7976 (HS227D27)

NIIN: 00-141-7976
In stock
NSN: 5331-00-141-7976
FSC Code: 5331
MPN: HS227D27

5331-00-297-9907 (HS227D23)

NIIN: 00-297-9907
In stock
NSN: 5331-00-297-9907
FSC Code: 5331
MPN: HS227D23

5331-00-141-7979 (HS227D5)

NIIN: 00-141-7979
In stock
NSN: 5331-00-141-7979
FSC Code: 5331
MPN: HS227D5

5331-01-488-5550 (792033-001)

NIIN: 01-488-5550
In stock
NSN: 5331-01-488-5550
FSC Code: 5331
MPN: 792033001

5331-00-434-4827 (HS227D12)

NIIN: 00-434-4827
In stock
NSN: 5331-00-434-4827
FSC Code: 5331
MPN: HS227D12

5331-01-559-1770 (791-NES-136A-90(NEW))

NIIN: 01-559-1770
In stock
NSN: 5331-01-559-1770
FSC Code: 5331
MPN: 791NES136A90NEW

5331-01-468-4274 (791-NES-033A-90)

NIIN: 01-468-4274
In stock
NSN: 5331-01-468-4274
FSC Code: 5331
MPN: 791NES033A90

5331-01-559-1742 (791-NES-018A-90(NEW))

NIIN: 01-559-1742
In stock
NSN: 5331-01-559-1742
FSC Code: 5331
MPN: 791NES018A90NEW

5331-01-468-5841 (791-NES-163A-90)

NIIN: 01-468-5841
In stock
NSN: 5331-01-468-5841
FSC Code: 5331
MPN: 791NES163A90

5331-01-559-1804 (791-NES-012A-90(NEW))

NIIN: 01-559-1804
In stock
NSN: 5331-01-559-1804
FSC Code: 5331
MPN: 791NES012A90NEW

5331-01-349-5539 (791-NES128A-90)

NIIN: 01-349-5539
In stock
NSN: 5331-01-349-5539
FSC Code: 5331
MPN: 791NES128A90

5331-01-349-1746 (791-NES-018A90)

NIIN: 01-349-1746
In stock
NSN: 5331-01-349-1746
FSC Code: 5331
MPN: 791NES018A90

5331-01-559-1803 (791-NES-128A-90(NEW))

NIIN: 01-559-1803
In stock
NSN: 5331-01-559-1803
FSC Code: 5331
MPN: 791NES128A90NEW

5331-01-254-7128 (HS012-342)

NIIN: 01-254-7128
In stock
NSN: 5331-01-254-7128
FSC Code: 5331
MPN: HS012342

5331-00-849-5956 (HPS21-008)

NIIN: 00-849-5956
In stock
NSN: 5331-00-849-5956
FSC Code: 5331
MPN: HPS21008

5331-00-610-5004 (HPS21-007)

NIIN: 00-610-5004
In stock
NSN: 5331-00-610-5004
FSC Code: 5331
MPN: HPS21007