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SMB171538 — SPRING,HELICAL,EXTENSION

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

SMB171538: SPRING,HELICAL,EXTENSION.

The SPRING,HELICAL,EXTENSION is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, end_style: SHORT TWISTED HOOK BOTH ENDS, design_type: CLOSED, hook_radius: 0.070 INCHES NOMINAL BOTH ENDS IN, load_rating: 5.375 POUNDS NOMINAL LBS, coil_quantity: 5-3/4. This part is cataloged in the U.S.

Government catalog under NSN 5360-00-524-0139, 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
SMB171538
NSN: 5360-00-524-0139
FSC: 5360 — Coil, Flat, Leaf, and Wire Springs
CAGE: 80063 — US ARMY COMMUNICATIONS & ELECTRONICS MATERIEL READINESS COMMAND LOGISTICS ENGINEERING DIR (USA)
SPECIFICATIONS
materialSTEEL OVERALL
end_styleSHORT TWISTED HOOK BOTH ENDS
design_typeCLOSED
hook_radius0.070 INCHES NOMINAL BOTH ENDS IN
load_rating5.375 POUNDS NOMINAL LBS
coil_quantity5-3/4
inside_diameter0.156 INCHES NOMINAL IN
style_designatorCYLINDRICAL
surface_treatmentTIN OVERALL
spring_free_length0.563 INCHES NOMINAL IN
coil_helix_directionLEFT-HAND
spring_length_under_load0.625 INCHES NOMINAL IN
NSN5360-00-524-0139
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SPRING,HELICAL,EXTENSION TITLE COMPONENT PN SMB171538 MFR SPRING,HELICAL,EXTENSI
KEY FEATURES
•
SPRING FREE OUTSIDE DIAMETER: 0.218 INCHES NOMINAL IN
•
LOAD RATING: 5.375 POUNDS NOMINAL LBS
•
END STYLE: SHORT TWISTED HOOK BOTH ENDS
•
DESIGN TYPE: CLOSED
•
STYLE DESIGNATOR: CYLINDRICAL
•
SPRING FREE LENGTH: 0.563 INCHES NOMINAL IN
•
INSIDE DIAMETER: 0.156 INCHES NOMINAL IN
•
SPRING LENGTH UNDER LOAD: 0.625 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
SPRING FREE OUTSIDE DIAMETER0.218 INCHES NOMINAL IN
LOAD RATING5.375 POUNDS NOMINAL LBS
END STYLESHORT TWISTED HOOK BOTH ENDS
DESIGN TYPECLOSED
STYLE DESIGNATORCYLINDRICAL
SPRING FREE LENGTH0.563 INCHES NOMINAL IN
INSIDE DIAMETER0.156 INCHES NOMINAL IN
SPRING LENGTH UNDER LOAD0.625 INCHES NOMINAL IN
COIL QUANTITY5-3/4
SURFACE TREATMENTTIN OVERALL
SUBSTITUTES & CROSS-REFERENCES 1
53974Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
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 SMB171538?
SMB171538 is a SPRING,HELICAL,EXTENSION.
What parts can replace SMB171538?
There is 1 known substitute for SMB171538: 53974. Substitute compatibility should be verified for your specific system.
What is the NSN for SMB171538?
SMB171538 is cataloged in the U.S. Government catalog under NSN 5360-00-524-0139. 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.