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398P ✓ Verified by PartsTable
— · COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

PISTON,INTERNAL COMBUSTION ENGIN. Key specifications include material: COPPER ALLOY, body_style: PLAIN, corner_shape: SQUARE ALL CORNERS, overall_length: 0.625 INCHES NOMINAL IN, body_inside_diameter: 3.625 INCHES NOMINAL IN, body_outside_diameter: 4.143 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 4320-00-398-7932, 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
398P
NSN: 4320-00-398-7932
FSC: 4320
CAGE: 93232 — CURTISS-WRIGHT ELECTRO-MECHANICAL CORPORATION DBA CURTISS WRIGHT ENGINEERED PUMP DIVISION USE CAGE CODE 0UBG9 FOR CATALOGING (USA)
SPECIFICATIONS
materialCOPPER ALLOY
body_stylePLAIN
corner_shapeSQUARE ALL CORNERS
overall_length0.625 INCHES NOMINAL IN
body_inside_diameter3.625 INCHES NOMINAL IN
body_outside_diameter4.143 INCHES NOMINAL IN
NSN4320-00-398-7932
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available PISTON,INTERNAL COMBUSTION ENGIN TITLE COMPONENT PN 398P MFR PISTON,INTERNAL COMBUS
KEY FEATURES
•
MATERIAL: COPPER ALLOY
•
CORNER SHAPE: SQUARE ALL CORNERS
•
BODY OUTSIDE DIAMETER: 4.143 INCHES NOMINAL IN
•
BODY INSIDE DIAMETER: 3.625 INCHES NOMINAL IN
•
BODY STYLE: PLAIN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALCOPPER ALLOY
CORNER SHAPESQUARE ALL CORNERS
BODY OUTSIDE DIAMETER4.143 INCHES NOMINAL IN
BODY INSIDE DIAMETER3.625 INCHES NOMINAL IN
BODY STYLEPLAIN
OVERALL LENGTH0.625 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
988PInterchangeable
interchangeable cross-reference
interchangeable
2053PNInterchangeable
interchangeable cross-reference
interchangeable
714PInterchangeable
interchangeable cross-reference
interchangeable
255206EInterchangeable
Same NIIN cross-reference
interchangeable
SL5206PC40Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 398P?
398P is a PISTON,INTERNAL COMBUSTION ENGIN.
What parts can replace 398P?
There are 5 known substitutes for 398P: 988P, 2053PN, 714P and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 398P?
398P is cataloged in the Federal Logistics Information System (FLIS) under NSN 4320-00-398-7932. 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