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551-2003 — SUPPORT,STRUCTURAL COMPONENT,AIR

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

551-2003: SUPPORT,STRUCTURAL COMPONENT,AIR.

SUPPORT,STRUCTURAL COMPONENT,AIR. Key specifications include shape: CYLINDRICAL, body_width: 0.350 INCHES NOMINAL IN, body_height: 0.125 INCHES NOMINAL IN, body_length: 0.400 INCHES NOMINAL IN, overall_width: 0.350 INCHES NOMINAL IN, cubic_capacity: 92.000 CUBIC INCHES. This part is cataloged in the U.S.

Government catalog under NSN 1650-00-395-2599, 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
551-2003
NSN: 1650-00-395-2599
NIINs: 003952599, 012194256
FSC: 1650 — Aircraft Hydraulic, Vacuum, and De-icing System Components
CAGE: 59364 — HONEYWELL INTERNATIONAL INC. DBA HONEYWELL INTERNATIONAL DIV AEROSPACE - TEMPE (WEST WARNER ROAD) (USA)
SPECIFICATIONS
shapeCYLINDRICAL
body_width0.350 INCHES NOMINAL IN
body_height0.125 INCHES NOMINAL IN
body_length0.400 INCHES NOMINAL IN
thread_class3
overall_width0.350 INCHES NOMINAL IN
cubic_capacity92.000 CUBIC INCHES
inclosure_typeFULLY INCLOSED
overall_height0.316 INCHES NOMINAL IN
overall_length0.400 INCHES NOMINAL IN
separator_typePISTON
actuator_height0.025 INCHES NOMINAL IN
NSN1650-00-395-2599
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SUPPORT,STRUCTURAL COMPONENT,AIR TITLE COMPONENT PN 551-2003 MFR SUPPORT,STRUCTURAL COM
KEY FEATURES
•
BLEEDER OPENING: INCLUDED
•
OVERALL DIAMETER: 3.420 INCHES NOMINAL IN
•
CUBIC CAPACITY: 92.000 CUBIC INCHES
•
PORT SCREW THREAD DIAMETER: 0.750 INCHES NOMINAL IN
•
PORT SCREW THREAD SERIES DESIGNATOR: UNF
•
SHAPE: CYLINDRICAL
•
OPERATING PRESSURE: 3000.000 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS
TECHNICAL CHARACTERISTICS
BLEEDER OPENINGINCLUDED
OVERALL DIAMETER3.420 INCHES NOMINAL IN
CUBIC CAPACITY92.000 CUBIC INCHES
PORT SCREW THREAD DIAMETER0.750 INCHES NOMINAL IN
PORT SCREW THREAD SERIES DESIGNATORUNF
SHAPECYLINDRICAL
OVERALL LENGTH20.370 INCHES NOMINAL IN
OPERATING PRESSURE3000.000 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS
PORT SCREW THREAD QUANTITY PER INCH16.000
SEPARATOR TYPEPISTON
SUBSTITUTES & CROSS-REFERENCES 2
1010530-4Reference document
Same NSN cross-reference
Reference document — Secondary reference
MIL-A-5498Reference document
Same NSN cross-reference
Reference document — Identification reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedDemilitarization required — critical (Q)
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FREQUENTLY ASKED QUESTIONS
What is 551-2003?
551-2003 is a SUPPORT,STRUCTURAL COMPONENT,AIR.
What parts can replace 551-2003?
There are 2 known substitutes for 551-2003: 1010530-4, MIL-A-5498. Substitute compatibility should be verified for your specific system.
What is the NSN for 551-2003?
551-2003 is cataloged in the U.S. Government catalog under NSN 1650-00-395-2599. 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.