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Technical Data Sheet
2551A ✓ Verified by PartsTable
· COMPONENT
WHAT YOU NEED TO KNOW
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Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

PISTON,INTERNAL COMBUSTION ENGIN. Key specifications include diameter: 2.000 INCHES NOMINAL IN, material: ALUMINUM, head_style: HAT, oil_groove: NOT INCLUDED, skirt_type: SOLID, carbon_groove: NOT INCLUDED. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 2805-00-406-0712, 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
2551A
NSN: 2805-00-406-0712
FSC: 2805
CAGE: 31568 — TEXTRON INC JACOBSEN DIV (USA)
SPECIFICATIONS
diameter2.000 INCHES NOMINAL IN
materialALUMINUM
head_styleHAT
oil_grooveNOT INCLUDED
skirt_typeSOLID
carbon_grooveNOT INCLUDED
overall_height2.438 INCHES NOMINAL IN
surface_finishFINISHED
pin_hole_bushingNOT INCLUDED
pinhole_diameter0.3750 INCHES MINIMUM AND 0.3753 INCHES MAXIMUM IN
ring_groove_width0.0940 INCHES MINIMUM AND 0.0950 INCHES MAXIMUM ALL RINGS IN
fsc_application_dataGASOLINE ENGINE,NONAIRCRAFT
NSN2805-00-406-0712
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available PISTON,INTERNAL COMBUSTION ENGIN TITLE COMPONENT PN 2551A MFR PISTON,INTERNAL COMBUS
KEY FEATURES
OIL GROOVE: NOT INCLUDED
RING GROOVE QUANTITY: 3
DISTANCE FROM PIN HOLE CENTER TO EXTREME TOP: 1.157 INCHES MINIMUM AND 1.167 INCHES MAXIMUM IN
RING GROOVE DIAMETER: 1.760 INCHES MAXIMUM SECOND RING IN
SURFACE FINISH: FINISHED
FINISHED SIZE DESIGNATION: STANDARD
CARBON GROOVE: NOT INCLUDED
FSC APPLICATION DATA: GASOLINE ENGINE,NONAIRCRAFT
TECHNICAL CHARACTERISTICS (FLIS)
OIL GROOVENOT INCLUDED
RING GROOVE QUANTITY3
DISTANCE FROM PIN HOLE CENTER TO EXTREME TOP1.157 INCHES MINIMUM AND 1.167 INCHES MAXIMUM IN
RING GROOVE DIAMETER1.760 INCHES MAXIMUM SECOND RING IN
SURFACE FINISHFINISHED
FINISHED SIZE DESIGNATIONSTANDARD
CARBON GROOVENOT INCLUDED
FSC APPLICATION DATAGASOLINE ENGINE,NONAIRCRAFT
PINNOT INCLUDED
PIN TYPE FOR WHICH DESIGNEDLOCKING
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
400-5289Interchangeable
interchangeable cross-reference
interchangeable
FLUKE-77Interchangeable
interchangeable cross-reference
interchangeable
00190488Interchangeable
interchangeable cross-reference
interchangeable
203552Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 2551A?
2551A is a PISTON,INTERNAL COMBUSTION ENGIN.
What parts can replace 2551A?
There are 4 known substitutes for 2551A: 400-5289, FLUKE-77, 00190488 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 2551A?
2551A is cataloged in the Federal Logistics Information System (FLIS) under NSN 2805-00-406-0712. This indicates validated use in U.S. government and defense supply chains.
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