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PartsTable / COMPONENT / AA-B-551 TY1
AA-B-551 TY1 ✓ 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 color: GRAY/GREY, material: STEEL, overall_width: 4.750 INCHES NOMINAL IN, overall_height: 5.500 INCHES NOMINAL IN, surface_treatment: ENAMEL, base_overall_length: 5.750 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 7520-00-139-6158, 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
AA-B-551 TY1
NSN: 7520-00-139-6158
FSC: 7520
CAGE: 80244 — GENERAL SERVICES ADMINISTRATION FEDERAL SUPPLY SERVICE (USA)
SPECIFICATIONS
colorGRAY/GREY
materialSTEEL
overall_width4.750 INCHES NOMINAL IN
overall_height5.500 INCHES NOMINAL IN
surface_treatmentENAMEL
base_overall_length5.750 INCHES NOMINAL IN
base_protective_coveringNOT INCLUDED
NSN7520-00-139-6158
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available PISTON,INTERNAL COMBUSTION ENGIN TITLE COMPONENT PN AA-B-551 TY1 MFR PISTON,INTERNAL COMBUS
KEY FEATURES
•
MATERIAL: STEEL
•
SURFACE TREATMENT: ENAMEL
•
BASE PROTECTIVE COVERING: NOT INCLUDED
•
BASE OVERALL LENGTH: 6.000 INCHES NOMINAL IN
•
COLOR: BEIGE, FED STD 595, 22563
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL WIDTH4.750 INCHES NOMINAL IN
MATERIALSTEEL
SURFACE TREATMENTENAMEL
BASE PROTECTIVE COVERINGNOT INCLUDED
BASE OVERALL LENGTH6.000 INCHES NOMINAL IN
COLORBEIGE, FED STD 595, 22563
OVERALL HEIGHT5.500 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
AA-B-551Interchangeable
interchangeable cross-reference
interchangeable
99967Interchangeable
interchangeable cross-reference
interchangeable
7520-00-264-5479Interchangeable
interchangeable cross-reference
interchangeable
99966Interchangeable
interchangeable cross-reference
interchangeable
N765350Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AA-B-551 TY1?
AA-B-551 TY1 is a PISTON,INTERNAL COMBUSTION ENGIN.
What parts can replace AA-B-551 TY1?
There are 5 known substitutes for AA-B-551 TY1: AA-B-551, 99967, 7520-00-264-5479 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for AA-B-551 TY1?
AA-B-551 TY1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 7520-00-139-6158. 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