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218569 — PLUG,EXPANSION

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

218569: PLUG,EXPANSION.

The PLUG,EXPANSION is a the manufacturer industrial component. Key specifications include height: 0.188 INCHES NOMINAL IN, material: STEEL, outside_diameter: 0.566 INCHES MINIMUM AND 0.570 INCHES MAXIMUM IN, style_designator: CUP. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-228-7144, 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
218569
NSN: 5340-00-228-7144
FSC: 5340 — Hardware, Commercial
CAGE: 31361 — WOODWARD, INC. (USA)
SPECIFICATIONS
height0.188 INCHES NOMINAL IN
materialSTEEL
outside_diameter0.566 INCHES MINIMUM AND 0.570 INCHES MAXIMUM IN
style_designatorCUP
NSN5340-00-228-7144
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 218569 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
•
OUTSIDE DIAMETER: 0.566 INCHES MINIMUM AND 0.570 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: CUP
•
HEIGHT: 0.188 INCHES NOMINAL IN
•
MATERIAL: STEEL
TECHNICAL CHARACTERISTICS
OUTSIDE DIAMETER0.566 INCHES MINIMUM AND 0.570 INCHES MAXIMUM IN
STYLE DESIGNATORCUP
HEIGHT0.188 INCHES NOMINAL IN
END ITEM IDENTIFICATIONW/S: FMS-KNOX CLASS; SPRUANCE CLASS DD (963); TICONDEROGA CLASS CG (47); FIRE PUMPS; 501K17 GAS TURBINE SYSTEMS; JOHN MACDONALD CLASS TAGS-51; PATHFINDER CLASS T-AGS 60; KIDD CLASS DDG; ARLEIGH BURKE CLASS DDG; AVENGER CLASS MCM
MATERIALSTEEL
SUBSTITUTES & CROSS-REFERENCES 2
218122Reference document
Same NSN cross-reference
Reference document — Secondary reference
4730PL0939927Reference document
Same NSN cross-reference
Reference document — Informative reference only
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 218569?
218569 is a PLUG,EXPANSION.
What parts can replace 218569?
There are 2 known substitutes for 218569: 218122, 4730PL0939927. Substitute compatibility should be verified for your specific system.
What is the NSN for 218569?
218569 is cataloged in the U.S. Government catalog under NSN 5340-00-228-7144. 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.