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AC1559 ✓ 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, coil_quantity: 6-1/2, inside_diameter: 0.781 INCHES NOMINAL IN, style_designator: CYLINDRICAL, spring_free_length: 1.781 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5360-00-664-7830, 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
AC1559
NSN: 5360-00-664-7830
FSC: 5360
CAGE: 55469 — ESSEX INDUSTRIES, INC. DBA ESSEX INDUSTRIES (USA)
SPECIFICATIONS
materialSTEEL OVERALL
end_styleSPRING END,SQUARED AND GROUND BOTH ENDS
coil_quantity6-1/2
inside_diameter0.781 INCHES NOMINAL IN
style_designatorCYLINDRICAL
spring_free_length1.781 INCHES NOMINAL IN
spring_solid_length0.719 INCHES MAXIMUM IN
coil_helix_directionRIGHT-HAND OR LEFT-HAND
spring_free_outside_diameter0.992 INCHES NOMINAL IN
NSN5360-00-664-7830
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SPRING,HELICAL,COMPRESSION TITLE COMPONENT PN AC1559 MFR SPRING,HELICAL,COMPRES
KEY FEATURES
•
INSIDE DIAMETER: 0.781 INCHES NOMINAL IN
•
COIL HELIX DIRECTION: RIGHT-HAND OR LEFT-HAND
•
SPRING SOLID LENGTH: 0.719 INCHES MAXIMUM IN
•
COIL QUANTITY: 6-1/2
•
SPRING FREE LENGTH: 1.781 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
SPRING FREE OUTSIDE DIAMETER: 0.992 INCHES NOMINAL IN
•
STYLE DESIGNATOR: CYLINDRICAL
TECHNICAL CHARACTERISTICS (FLIS)
INSIDE DIAMETER0.781 INCHES NOMINAL IN
COIL HELIX DIRECTIONRIGHT-HAND OR LEFT-HAND
SPRING SOLID LENGTH0.719 INCHES MAXIMUM IN
COIL QUANTITY6-1/2
SPRING FREE LENGTH1.781 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
SPRING FREE OUTSIDE DIAMETER0.992 INCHES NOMINAL IN
STYLE DESIGNATORCYLINDRICAL
END STYLESPRING END,SQUARED AND GROUND BOTH ENDS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
3-906-S383-70Interchangeable
interchangeable cross-reference
interchangeable
R1131-906Interchangeable
interchangeable cross-reference
interchangeable
AS568-906-S32Interchangeable
interchangeable cross-reference
interchangeable
524BL390Interchangeable
interchangeable cross-reference
interchangeable
109006Interchangeable
interchangeable cross-reference
interchangeable
524B27AInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AC1559?
AC1559 is a SPRING,HELICAL,COMPRESSION.
What parts can replace AC1559?
There are 12 known substitutes for AC1559: 3-906-S383-70, R1131-906, AS568-906-S32 and 9 more. Substitute compatibility should be verified for your specific system.
Is AC1559 still available?
AC1559 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026