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Technical Data Sheet
PartsTable / COMPONENT / 945-1402
945-1402 ✓ Verified by PartsTable
— · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

RETAINER,HELICAL COMPRESSION SPR. Key specifications include material: COPPER ALLOY 905, overall_height: 0.938 INCHES NOMINAL IN, flange_diameter: 1.875 INCHES NOMINAL IN, flange_thickness: 0.125 INCHES NOMINAL IN, style_designator: IRREGULAR, body_inside_diameter: 0.531 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-945-1402, 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
945-1402
NSN: 5340-00-945-1402
FSC: 5340
CAGE: 59155 — MARINE DIESEL, INC. DBA MARINE DIESEL (USA)
SPECIFICATIONS
materialCOPPER ALLOY 905
overall_height0.938 INCHES NOMINAL IN
flange_diameter1.875 INCHES NOMINAL IN
flange_thickness0.125 INCHES NOMINAL IN
style_designatorIRREGULAR
body_inside_diameter0.531 INCHES NOMINAL IN
body_outside_diameter0.750 INCHES NOMINAL IN
casehardening_indicatorNOT CASEHARDENED
NSN5340-00-945-1402
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 945-1402 MFR: OEM ⚠ 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
KEY FEATURES
•
BODY INSIDE DIAMETER: 0.531 INCHES NOMINAL IN
•
FLANGE DIAMETER: 1.875 INCHES NOMINAL IN
•
STYLE DESIGNATOR: IRREGULAR
•
MATERIAL: COPPER ALLOY 905
•
BODY OUTSIDE DIAMETER: 0.750 INCHES NOMINAL IN
•
FLANGE THICKNESS: 0.125 INCHES NOMINAL IN
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
TECHNICAL CHARACTERISTICS (FLIS)
BODY INSIDE DIAMETER0.531 INCHES NOMINAL IN
OVERALL HEIGHT0.938 INCHES NOMINAL IN
FLANGE DIAMETER1.875 INCHES NOMINAL IN
STYLE DESIGNATORIRREGULAR
MATERIALCOPPER ALLOY 905
BODY OUTSIDE DIAMETER0.750 INCHES NOMINAL IN
FLANGE THICKNESS0.125 INCHES NOMINAL IN
CASEHARDENING INDICATORNOT CASEHARDENED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
UC-18Interchangeable
interchangeable cross-reference
interchangeable
BS5-2351-132Interchangeable
interchangeable cross-reference
interchangeable
BS5-2351Interchangeable
interchangeable cross-reference
interchangeable
TC-18Interchangeable
interchangeable cross-reference
interchangeable
BS5-2351,PC.163Interchangeable
interchangeable cross-reference
interchangeable
CS 0842090Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 945-1402?
945-1402 is a RETAINER,HELICAL COMPRESSION SPR.
What parts can replace 945-1402?
There are 10 known substitutes for 945-1402: UC-18, BS5-2351-132, BS5-2351 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 945-1402?
945-1402 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-945-1402. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026