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121-0145 — O-RING

✓ Government record, cited
3M · ORING SEAL
PRODUCT OVERVIEW

121-0145: O-RING.

You like to use your mobile device outdoors? The sun is shining and you want to spend as much time as possible outdoors. To increase the readability of your device - especially in sunlight - we offer MySunshadeDisplay Screen Protector.

Vikuiti protection films are designed for application to electronic displays. This part is cataloged in the U.S. Government catalog under NSN 5331-01-507-4023, indicating validated use in U.S.

government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
121-0145
NSN: 5331-01-507-4023
FSC: 5331 — O-ring
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
end_item_identificationDIESEL ENGINE,E; LOGISTICS SUPPORT VESSEL
part_name_assigned_by_controlling_agencySEAL,O-RING
NSN5331-01-507-4023
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 121-0145 MFR: 3M ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
TECHNICAL CHARACTERISTICS
PART NAME ASSIGNED BY CONTROLLING AGENCYSEAL,O-RING
END ITEM IDENTIFICATIONDIESEL ENGINE,E; LOGISTICS SUPPORT VESSEL
OTHER ITEMS IN FSC 5331 — O-ring
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5331-00-001-1971 5331-00-001-1979 5331-00-001-3904 5331-00-001-3905 5331-00-001-3906 5331-00-001-3908 5331-00-001-3923 5331-00-001-3924
SUBSTITUTES & CROSS-REFERENCES 2
3664487Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
10KP311Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 121-0145?
121-0145 is a O-RING manufactured by 3M.
What parts can replace 121-0145?
There are 2 known substitutes for 121-0145: 3664487, 10KP311. Substitute compatibility should be verified for your specific system.
What is the NSN for 121-0145?
121-0145 is cataloged in the U.S. Government catalog under NSN 5331-01-507-4023. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.