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A55 — ADAPTER,SWITCH ACTUATOR

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

A55: ADAPTER,SWITCH ACTUATOR.

The ADAPTER,SWITCH ACTUATOR is a the manufacturer industrial component. Key specifications include diameter: 0.875 INCHES NOMINAL IN, material: STEEL, end_style: SPRING END,SQUARED AND GROUND BOTH ENDS, cut_length: 1.875 INCHES NOMINAL IN, shank_type: WELDON, body_length: 0.208 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5360-00-290-8907, 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
A55
NSN: 5360-00-290-8907
NIINs: 002908907, 005290354, 006697502, 008414368, 009969742, 010393544, 010885616, 011338095
FSC: 5360 — Coil, Flat, Leaf, and Wire Springs
CAGE: 38056 — ASHCROFT INC DBA HEISE (USA)
SPECIFICATIONS
diameter0.875 INCHES NOMINAL IN
materialSTEEL
end_styleSPRING END,SQUARED AND GROUND BOTH ENDS
cut_length1.875 INCHES NOMINAL IN
shank_typeWELDON
body_length0.208 INCHES NOMINAL IN
design_formSINGLE END
flute_designHELICAL
coil_quantity9
nominal_width0.500 INCHES IN
overall_length4.125 INCHES NOMINAL IN
shank_diameter0.750 INCHES NOMINAL IN
NSN5360-00-290-8907
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available ADAPTER,SWITCH ACTUATOR TITLE COMPONENT PN A55 MFR ADAPTER,SWITCH ACTUATO
KEY FEATURES
•
SPRING FREE OUTSIDE DIAMETER: 1.405 INCHES NOMINAL IN
•
END STYLE: SPRING END,SQUARED AND GROUND BOTH ENDS
•
STYLE DESIGNATOR: CYLINDRICAL
•
SPRING FREE LENGTH: 2.625 INCHES NOMINAL IN
•
SPRING DEFLECTION RATE: 151.700 POUNDS PER INCH NOMINAL LBS
•
INSIDE DIAMETER: 0.875 INCHES NOMINAL IN
•
COIL QUANTITY: 9
•
SURFACE TREATMENT: CADMIUM OVERALL
TECHNICAL CHARACTERISTICS
SPRING FREE OUTSIDE DIAMETER1.405 INCHES NOMINAL IN
END STYLESPRING END,SQUARED AND GROUND BOTH ENDS
STYLE DESIGNATORCYLINDRICAL
SPRING FREE LENGTH2.625 INCHES NOMINAL IN
SPRING DEFLECTION RATE151.700 POUNDS PER INCH NOMINAL LBS
INSIDE DIAMETER0.875 INCHES NOMINAL IN
COIL QUANTITY9
SURFACE TREATMENTCADMIUM OVERALL
COIL HELIX DIRECTIONRIGHT-HAND
MATERIALSTEEL OVERALL
SUBSTITUTES & CROSS-REFERENCES 1
SG2881APC137Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is A55?
A55 is a ADAPTER,SWITCH ACTUATOR.
What parts can replace A55?
There is 1 known substitute for A55: SG2881APC137. Substitute compatibility should be verified for your specific system.
What is the NSN for A55?
A55 is cataloged in the U.S. Government catalog under NSN 5360-00-290-8907. 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.