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Technical Data Sheet
556-3441 ✓ 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,EXTENSION is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, end_style: RAISED HOOK BOTH ENDS, design_type: CLOSED, hook_radius: 0.029 INCHES NOMINAL BOTH ENDS IN, coil_quantity: 12, opening_width: 0.063 INCHES NOMINAL BOTH ENDS 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 5360-00-205-4640, 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
556-3441
NSN: 5360-00-205-4640
FSC: 5360
CAGE: 11530 — LOCKHEED MARTIN CORPORATION DIV LOCKHEED MARTIN INFORMATION SYSTEMS & GLOBAL SOLUTIONS (USA)
SPECIFICATIONS
materialSTEEL OVERALL
end_styleRAISED HOOK BOTH ENDS
design_typeCLOSED
hook_radius0.029 INCHES NOMINAL BOTH ENDS IN
coil_quantity12
opening_width0.063 INCHES NOMINAL BOTH ENDS IN
inside_diameter0.052 INCHES MINIMUM AND 0.057 INCHES MAXIMUM IN
style_designatorCYLINDRICAL
surface_treatmentCADMIUM OVERALL
spring_free_length0.500 INCHES NOMINAL IN
coil_helix_directionRIGHT-HAND OR LEFT-HAND
spring_free_outside_diameter0.080 INCHES MINIMUM AND 0.085 INCHES MAXIMUM IN
NSN5360-00-205-4640
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SPRING,HELICAL,EXTENSION TITLE COMPONENT PN 556-3441 MFR SPRING,HELICAL,EXTENSI
KEY FEATURES
SURFACE TREATMENT: CADMIUM OVERALL
COIL QUANTITY: 12
DESIGN TYPE: CLOSED
END STYLE: RAISED HOOK BOTH ENDS
COIL HELIX DIRECTION: RIGHT-HAND OR LEFT-HAND
INSIDE DIAMETER: 0.052 INCHES MINIMUM AND 0.057 INCHES MAXIMUM IN
STYLE DESIGNATOR: CYLINDRICAL
SPRING FREE OUTSIDE DIAMETER: 0.080 INCHES MINIMUM AND 0.085 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENTCADMIUM OVERALL
COIL QUANTITY12
DESIGN TYPECLOSED
END STYLERAISED HOOK BOTH ENDS
COIL HELIX DIRECTIONRIGHT-HAND OR LEFT-HAND
INSIDE DIAMETER0.052 INCHES MINIMUM AND 0.057 INCHES MAXIMUM IN
STYLE DESIGNATORCYLINDRICAL
SPRING FREE OUTSIDE DIAMETER0.080 INCHES MINIMUM AND 0.085 INCHES MAXIMUM IN
HOOK RADIUS0.029 INCHES NOMINAL BOTH ENDS IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-W-470 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
666045Interchangeable
interchangeable cross-reference
interchangeable
P25Interchangeable
interchangeable cross-reference
interchangeable
P124Interchangeable
interchangeable cross-reference
interchangeable
08834164001Interchangeable
interchangeable cross-reference
interchangeable
PM-75Interchangeable
interchangeable cross-reference
interchangeable
64001Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 556-3441?
556-3441 is a SPRING,HELICAL,EXTENSION.
What parts can replace 556-3441?
There are 6 known substitutes for 556-3441: 666045, P25, P124 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 556-3441?
556-3441 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5360-00-205-4640. This indicates validated use in U.S. government and defense supply chains.
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