B566-251 — SPRING,HELICAL,EXTENSION

✓ Government record, cited

— · COMPONENT

PRODUCT OVERVIEW

B566-251: SPRING,HELICAL,EXTENSION.

The SPRING,HELICAL,EXTENSION is a the manufacturer industrial component. Key specifications include end_style: SHORT TWISTED HOOK SECOND END, design_type: CLOSED, hook_radius: 0.125 INCHES NOMINAL FIRST END IN, coil_quantity: 15, inside_diameter: 0.245 INCHES NOMINAL IN, style_designator: CYLINDRICAL. This part is cataloged in the U.S.

Government catalog under NSN 5360-00-896-6581, 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

B566-251

NSN: 5360-00-896-6581
FSC: 5360 — Coil, Flat, Leaf, and Wire Springs
CAGE: 34228 — L3 TECHNOLOGIES, INC. DIV L3 KEO (USA)

SPECIFICATIONS

end_style	SHORT TWISTED HOOK SECOND END
design_type	CLOSED
hook_radius	0.125 INCHES NOMINAL FIRST END IN
coil_quantity	15
inside_diameter	0.245 INCHES NOMINAL IN
style_designator	CYLINDRICAL
spring_free_length	1.422 INCHES NOMINAL IN
coil_helix_direction	RIGHT-HAND OR LEFT-HAND
spring_deflection_rate	35.200 POUNDS PER INCH NOMINAL LBS
coil_to_hook_inside_length	0.187 INCHES NOMINAL SECOND END IN
spring_free_outside_diameter	0.355 INCHES NOMINAL IN
material_document_and_classification	QQ-W-470 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN	5360-00-896-6581

COMPONENT DIAGRAM

KEY FEATURES

•

SPRING FREE OUTSIDE DIAMETER: 0.355 INCHES NOMINAL IN

•

END STYLE: SHORT TWISTED HOOK SECOND END

•

DESIGN TYPE: CLOSED

•

STYLE DESIGNATOR: CYLINDRICAL

•

MATERIAL DOCUMENT AND CLASSIFICATION: QQ-W-470 FED SPEC SINGLE MATERIAL RESPONSE OVERALL

•

SPRING FREE LENGTH: 1.422 INCHES NOMINAL IN

•

SPRING DEFLECTION RATE: 35.200 POUNDS PER INCH NOMINAL LBS

TECHNICAL CHARACTERISTICS

SPRING FREE OUTSIDE DIAMETER	0.355 INCHES NOMINAL IN
END STYLE	SHORT TWISTED HOOK SECOND END
END STYLE	DOUBLE TWIST LOOP FIRST END
DESIGN TYPE	CLOSED
STYLE DESIGNATOR	CYLINDRICAL
MATERIAL DOCUMENT AND CLASSIFICATION	QQ-W-470 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
SPRING FREE LENGTH	1.422 INCHES NOMINAL IN
SPRING DEFLECTION RATE	35.200 POUNDS PER INCH NOMINAL LBS
COIL TO HOOK INSIDE LENGTH	0.187 INCHES NOMINAL SECOND END IN
COIL TO HOOK INSIDE LENGTH	0.305 INCHES NOMINAL FIRST END IN

OTHER ITEMS IN FSC 5360 — Coil, Flat, Leaf, and Wire Springs

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

5360-00-001-1842 5360-00-001-1945 5360-00-001-2010 5360-00-001-3865 5360-00-001-3950 5360-00-001-4650 5360-00-001-4664 5360-00-001-4703

SUBSTITUTES & CROSS-REFERENCES 1

566B004887Reference document

Same NSN cross-reference

Reference document — Advisory reference — outside the item-of-supply concept

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 B566-251?

B566-251 is a SPRING,HELICAL,EXTENSION.

What parts can replace B566-251?

There is 1 known substitute for B566-251: 566B004887. Substitute compatibility should be verified for your specific system.

What is the NSN for B566-251?

B566-251 is cataloged in the U.S. Government catalog under NSN 5360-00-896-6581. This indicates validated use in U.S. government and defense supply chains.

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