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PartsTable / COMPONENT / A52420-18
A52420-18 ✓ 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. Key specifications include radius: 4.500 INCHES NOMINAL IN, material: STEEL, outside_diameter: 2.745 INCHES MINIMUM AND 2.755 INCHES MAXIMUM IN, style_designator: CONCAVE, material_thickness: 0.083 INCHES NOMINAL IN, material_document_and_classification: 66, 1008 TO 1022 FED STD SINGLE MATERIAL RESPONSE. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-898-9829, 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
A52420-18
NSN: 5340-00-898-9829
FSC: 5340
CAGE: 58536 — FEDERAL COMMERCIAL ITEM DESCRIPTION PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC (USA)
SPECIFICATIONS
radius4.500 INCHES NOMINAL IN
materialSTEEL
outside_diameter2.745 INCHES MINIMUM AND 2.755 INCHES MAXIMUM IN
style_designatorCONCAVE
material_thickness0.083 INCHES NOMINAL IN
material_document_and_classification66, 1008 TO 1022 FED STD SINGLE MATERIAL RESPONSE
NSN5340-00-898-9829
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: A52420-18 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
•
MATERIAL: STEEL
•
RADIUS: 4.500 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66, 1008 TO 1022 FED STD SINGLE MATERIAL RESPONSE
•
OUTSIDE DIAMETER: 2.745 INCHES MINIMUM AND 2.755 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.083 INCHES NOMINAL IN
•
STYLE DESIGNATOR: CONCAVE
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL
RADIUS4.500 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATION66, 1008 TO 1022 FED STD SINGLE MATERIAL RESPONSE
OUTSIDE DIAMETER2.745 INCHES MINIMUM AND 2.755 INCHES MAXIMUM IN
MATERIAL THICKNESS0.083 INCHES NOMINAL IN
STYLE DESIGNATORCONCAVE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 34
A-A-52420-15Interchangeable
interchangeable cross-reference
interchangeable
140089Interchangeable
interchangeable cross-reference
interchangeable
WPP1677Interchangeable
interchangeable cross-reference
interchangeable
S703Interchangeable
interchangeable cross-reference
interchangeable
172531Interchangeable
interchangeable cross-reference
interchangeable
X2247Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A52420-18?
A52420-18 is a PLUG,EXPANSION.
What parts can replace A52420-18?
There are 34 known substitutes for A52420-18: A-A-52420-15, 140089, WPP1677 and 31 more. Substitute compatibility should be verified for your specific system.
Is A52420-18 still available?
A52420-18 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026