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B43681 — SPRING,HELICAL,COMPRESSION

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

B43681: SPRING,HELICAL,COMPRESSION.

The SPRING,HELICAL,COMPRESSION is a the manufacturer industrial component. Key specifications include end_style: SPRING END,SQUARED AND GROUND BOTH ENDS, inside_diameter: 0.396 INCHES MINIMUM IN, style_designator: CYLINDRICAL, spring_free_length: 2.734 INCHES NOMINAL IN, spring_solid_length: 1.375 INCHES NOMINAL IN, coil_helix_direction: LEFT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 5360-00-597-0359, 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
B43681
NSN: 5360-00-597-0359
FSC: 5360 — Coil, Flat, Leaf, and Wire Springs
CAGE: 62983 — EATON AEROSPACE, LLC DBA JACKSON SOUTH (USA)
SPECIFICATIONS
end_styleSPRING END,SQUARED AND GROUND BOTH ENDS
inside_diameter0.396 INCHES MINIMUM IN
style_designatorCYLINDRICAL
spring_free_length2.734 INCHES NOMINAL IN
spring_solid_length1.375 INCHES NOMINAL IN
coil_helix_directionLEFT-HAND
spring_deflection_rate32.585 POUNDS PER INCH MINIMUM AND 36.015 POUNDS PER INCH MAXIMUM LBS
spring_free_outside_diameter0.572 INCHES MAXIMUM IN
NSN5360-00-597-0359
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SPRING,HELICAL,COMPRESSION TITLE COMPONENT PN B43681 MFR SPRING,HELICAL,COMPRES
KEY FEATURES
•
SPRING FREE OUTSIDE DIAMETER: 0.572 INCHES MAXIMUM IN
•
END STYLE: SPRING END,SQUARED AND GROUND BOTH ENDS
•
SPRING SOLID LENGTH: 1.375 INCHES NOMINAL IN
•
STYLE DESIGNATOR: CYLINDRICAL
•
SPRING FREE LENGTH: 2.734 INCHES NOMINAL IN
•
SPRING DEFLECTION RATE: 32.585 POUNDS PER INCH MINIMUM AND 36.015 POUNDS PER INCH MAXIMUM LBS
•
INSIDE DIAMETER: 0.396 INCHES MINIMUM IN
•
COIL HELIX DIRECTION: LEFT-HAND
TECHNICAL CHARACTERISTICS
SPRING FREE OUTSIDE DIAMETER0.572 INCHES MAXIMUM IN
END STYLESPRING END,SQUARED AND GROUND BOTH ENDS
SPRING SOLID LENGTH1.375 INCHES NOMINAL IN
STYLE DESIGNATORCYLINDRICAL
SPRING FREE LENGTH2.734 INCHES NOMINAL IN
SPRING DEFLECTION RATE32.585 POUNDS PER INCH MINIMUM AND 36.015 POUNDS PER INCH MAXIMUM LBS
INSIDE DIAMETER0.396 INCHES MINIMUM IN
COIL HELIX DIRECTIONLEFT-HAND
SUBSTITUTES & CROSS-REFERENCES 2
N45141PC4Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
43681Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is B43681?
B43681 is a SPRING,HELICAL,COMPRESSION.
What parts can replace B43681?
There are 2 known substitutes for B43681: N45141PC4, 43681. Substitute compatibility should be verified for your specific system.
What is the NSN for B43681?
B43681 is cataloged in the U.S. Government catalog under NSN 5360-00-597-0359. 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.