PartsTable
Technical Data Sheet
953518-21 ✓ 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

The PLUG,EXPANSION is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-264-8172, 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
953518-21
NSN: 5340-01-264-8172
FSC: 5340
CAGE: 06848 — HONEYWELL INTERNATIONAL INC DIV AEROSPACE-SOUTH BEND (BENDIX DR) (USA)
SPECIFICATIONS
Part Number953518-21
NSN5340-01-264-8172
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 953518-21 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
967C314-2Upgraded Successor
successor cross-reference
successor
3ABUpgraded Successor
successor cross-reference
successor
PLGA2810010AUpgraded Successor
successor cross-reference
successor
21C2200-068Interchangeable
interchangeable cross-reference
interchangeable
2162200-068Interchangeable
interchangeable cross-reference
interchangeable
283999-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 953518-21?
953518-21 is a PLUG,EXPANSION.
What parts can replace 953518-21?
There are 14 known substitutes for 953518-21: 967C314-2, 3AB, PLGA2810010A and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 953518-21?
953518-21 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-264-8172. This indicates validated use in U.S. government and defense supply chains.
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