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550371 — HEAT EXCHANGER,AIR TO AIR,AIRCRA

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

550371: HEAT EXCHANGER,AIR TO AIR,AIRCRA.

HEAT EXCHANGER,AIR TO AIR,AIRCRA. Key specifications include material: IRON OVERALL, ring_style: CONCENTRIC, joint_style: VERTICAL JOINT, overall_width: 0.1550 INCHES NOMINAL IN, radial_wall_thickness: 0.1110 INCHES NOMINAL IN, standard_bore_diameter: 2.500 INCHES IN. This part is cataloged in the U.S.

Government catalog under NSN 1660-00-798-3207, 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
550371
NSN: 1660-00-798-3207
NIINs: 007983207, 008654949
FSC: 1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment
CAGE: 73030 — HAMILTON SUNDSTRAND CORPORATION DBA COLLINS AEROSPACE (USA)
SPECIFICATIONS
materialIRON OVERALL
ring_styleCONCENTRIC
joint_styleVERTICAL JOINT
overall_width0.1550 INCHES NOMINAL IN
radial_wall_thickness0.1110 INCHES NOMINAL IN
standard_bore_diameter2.500 INCHES IN
cross-sectional_shape_styleBEVELED FACE, DOUBLE SCRAPER, VENTILATED OIL CONTROL
oil_passage_type_and_quantity1 GROOVE OUTSIDE PERIPHERY
NSN1660-00-798-3207
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available HEAT EXCHANGER,AIR TO AIR,AIRCRA TITLE COMPONENT PN 550371 MFR HEAT EXCHANGER,AIR TO
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT11.010 INCHES NOMINAL IN
OVERALL WIDTH10.000 INCHES NOMINAL IN
SPECIAL FEATURES16.000 IN. APPROX LG IN
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Demilitarization required — mutilation
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FREQUENTLY ASKED QUESTIONS
What is 550371?
550371 is a HEAT EXCHANGER,AIR TO AIR,AIRCRA.
What is the NSN for 550371?
550371 is cataloged in the U.S. Government catalog under NSN 1660-00-798-3207. 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.