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A21478 ✓ 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

The SPRING,HELICAL,COMPRESSION is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, end_style: SPRING END,SQUARED AND GROUND BOTH ENDS, inside_diameter: 0.875 INCHES NOMINAL IN, style_designator: CYLINDRICAL, spring_free_length: 1.281 INCHES NOMINAL IN, spring_solid_length: 0.500 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 5360-00-400-8512, 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
A21478
NSN: 5360-00-400-8512
FSC: 5360
CAGE: 10988 — CNH INDUSTRIAL AMERICA LLC DBA CNH AMERICA (USA)
SPECIFICATIONS
materialSTEEL OVERALL
end_styleSPRING END,SQUARED AND GROUND BOTH ENDS
coil_quantity6
inside_diameter0.875 INCHES NOMINAL IN
style_designatorCYLINDRICAL
spring_free_length1.281 INCHES NOMINAL IN
spring_solid_length0.500 INCHES NOMINAL IN
coil_helix_directionRIGHT-HAND OR LEFT-HAND
spring_free_outside_diameter1.035 INCHES NOMINAL IN
NSN5360-00-400-8512
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SPRING,HELICAL,COMPRESSION TITLE COMPONENT PN A21478 MFR SPRING,HELICAL,COMPRES
KEY FEATURES
•
SPRING FREE LENGTH: 1.281 INCHES NOMINAL IN
•
END STYLE: SPRING END,SQUARED AND GROUND BOTH ENDS
•
SPRING SOLID LENGTH: 0.500 INCHES NOMINAL IN
•
COIL HELIX DIRECTION: RIGHT-HAND OR LEFT-HAND
•
STYLE DESIGNATOR: CYLINDRICAL
•
MATERIAL: STEEL OVERALL
•
SPRING FREE OUTSIDE DIAMETER: 1.035 INCHES NOMINAL IN
•
COIL QUANTITY: 6
TECHNICAL CHARACTERISTICS (FLIS)
SPRING FREE LENGTH1.281 INCHES NOMINAL IN
END STYLESPRING END,SQUARED AND GROUND BOTH ENDS
SPRING SOLID LENGTH0.500 INCHES NOMINAL IN
COIL HELIX DIRECTIONRIGHT-HAND OR LEFT-HAND
STYLE DESIGNATORCYLINDRICAL
MATERIALSTEEL OVERALL
SPRING FREE OUTSIDE DIAMETER1.035 INCHES NOMINAL IN
COIL QUANTITY6
INSIDE DIAMETER0.875 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
51146Interchangeable
interchangeable cross-reference
interchangeable
AM6056ASA65Interchangeable
interchangeable cross-reference
interchangeable
5-1-145Interchangeable
interchangeable cross-reference
interchangeable
MIL-F-2692Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A21478?
A21478 is a SPRING,HELICAL,COMPRESSION.
What parts can replace A21478?
There are 4 known substitutes for A21478: 51146, AM6056ASA65, 5-1-145 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for A21478?
A21478 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5360-00-400-8512. 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