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Technical Data Sheet
PartsTable / COMPONENT / 6-43903-4
6-43903-4 ✓ 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

CYLINDER ASSEMBLY,HYDRAULIC BRAK. Key specifications include design_type: NONREUSABLE, media_for_which_designed: ANY ACCEPTABLE, filtering_system_for_which_designed: FULL FLOW. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 1630-00-112-2603, 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
6-43903-4
NSN: 1630-00-112-2603
FSC: 1630
CAGE: 0JRC1 — NORTHROP GRUMMAN TECHNICAL SERVICES, INC. DBA DEFENSE SYSTEMS SECTOR (USA)
SPECIFICATIONS
design_typeNONREUSABLE
media_for_which_designedANY ACCEPTABLE
filtering_element_quantity1
filtering_system_for_which_designedFULL FLOW
NSN1630-00-112-2603
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CYLINDER ASSEMBLY,HYDRAULIC BRAK TITLE COMPONENT PN 6-43903-4 MFR CYLINDER ASSEMBLY,HYDR
KEY FEATURES
•
MOUNTING TYPE AND LOCATION: FLANGE CENTER SECTION
•
CRITICALITY CODE JUSTIFICATION: FEAT
•
FIRST END FORK SPAN WIDTH: 0.440 INCHES NOMINAL ALL WORKING ENDS IN
•
FIRST PISTON ROD END STYLE: SLOT TYPE ALL WORKING ENDS
•
MOUNTING PROVISION ARRANGEMENT STYLE: TWO HOLE
•
MOUNTING FACILITY DIAMETER: 4.188 INCHES NOMINAL IN
•
MOUNTING PROVISION: UNTHREADED MOUNTING HOLES
TECHNICAL CHARACTERISTICS (FLIS)
MOUNTING TYPE AND LOCATIONFLANGE CENTER SECTION
CRITICALITY CODE JUSTIFICATIONFEAT
FIRST END FORK SPAN WIDTH0.440 INCHES NOMINAL ALL WORKING ENDS IN
FIRST PISTON ROD END STYLESLOT TYPE ALL WORKING ENDS
MOUNTING PROVISION ARRANGEMENT STYLETWO HOLE
SPECIAL FEATURESITEM IS LANDING GEAR SPECIFIC ANDHAS CRITICAL CHARACTERISTICS AND DIMENSIONS THAT MUST BE MAINTAINED FOR SAFE OPERATIONS
MOUNTING FACILITY DIAMETER4.188 INCHES NOMINAL IN
MOUNTING PROVISIONUNTHREADED MOUNTING HOLES
TEMP RATING70.0 FAHRENHEIT AND 110.0 FAHRENHEIT DEGF
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
PF932Interchangeable
interchangeable cross-reference
interchangeable
51794Interchangeable
interchangeable cross-reference
interchangeable
PM-487Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 6-43903-4?
6-43903-4 is a CYLINDER ASSEMBLY,HYDRAULIC BRAK.
What parts can replace 6-43903-4?
There are 3 known substitutes for 6-43903-4: PF932, 51794, PM-487. Substitute compatibility should be verified for your specific system.
What is the NSN for 6-43903-4?
6-43903-4 is cataloged in the Federal Logistics Information System (FLIS) under NSN 1630-00-112-2603. 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