B21597 — SPRING,HELICAL,TORSION

✓ Government record, cited

— · COMPONENT

PRODUCT OVERVIEW

B21597: SPRING,HELICAL,TORSION.

The SPRING,HELICAL,TORSION is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, end_style: STRAIGHT OFFSET BOTH ENDS, end_length: 0.125 INCHES NOMINAL FIRST END IN, coil_quantity: 4-1/2, inside_diameter: 0.453 INCHES NOMINAL IN, style_designator: SINGLE TORSION LEFT HAND. This part is cataloged in the U.S.

Government catalog under NSN 5360-00-316-4558, 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

B21597

NSN: 5360-00-316-4558
FSC: 5360 — Coil, Flat, Leaf, and Wire Springs
CAGE: 92208 — LITTON SYSTEMS INC ITEK OPTICAL SYSTEMS DIV (USA)

SPECIFICATIONS

material	STEEL OVERALL
end_style	STRAIGHT OFFSET BOTH ENDS
end_length	0.125 INCHES NOMINAL FIRST END IN
coil_quantity	4-1/2
inside_diameter	0.453 INCHES NOMINAL IN
style_designator	SINGLE TORSION LEFT HAND
spring_free_length	0.671 INCHES NOMINAL IN
coil_helix_direction	RIGHT-HAND
end_angular_relationship	ENDS ANGLED ONE TO OTHER
spring_free_outside_diameter	0.587 INCHES NOMINAL IN
material_document_and_classification	MIL-W-6101 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN	5360-00-316-4558

COMPONENT DIAGRAM

KEY FEATURES

•

SPRING FREE OUTSIDE DIAMETER: 0.587 INCHES NOMINAL IN

•

END STYLE: STRAIGHT OFFSET BOTH ENDS

•

END LENGTH: 0.125 INCHES NOMINAL FIRST END IN

•

STYLE DESIGNATOR: SINGLE TORSION LEFT HAND

•

MATERIAL DOCUMENT AND CLASSIFICATION: MIL-W-6101 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL

•

SPRING FREE LENGTH: 0.671 INCHES NOMINAL IN

•

INSIDE DIAMETER: 0.453 INCHES NOMINAL IN

TECHNICAL CHARACTERISTICS

SPRING FREE OUTSIDE DIAMETER	0.587 INCHES NOMINAL IN
END STYLE	STRAIGHT OFFSET BOTH ENDS
END LENGTH	0.125 INCHES NOMINAL FIRST END IN
END LENGTH	0.250 INCHES NOMINAL SECOND END IN
STYLE DESIGNATOR	SINGLE TORSION LEFT HAND
MATERIAL DOCUMENT AND CLASSIFICATION	MIL-W-6101 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
SPRING FREE LENGTH	0.671 INCHES NOMINAL IN
INSIDE DIAMETER	0.453 INCHES NOMINAL IN
COIL QUANTITY	4-1/2
COIL HELIX DIRECTION	RIGHT-HAND

SUBSTITUTES & CROSS-REFERENCES 3

979-1A594Reference document

Same NSN cross-reference

Reference document — Secondary reference

206-484Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

R12059Reference document

Same NSN cross-reference

Reference document — Secondary 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 B21597?

B21597 is a SPRING,HELICAL,TORSION.

What parts can replace B21597?

There are 3 known substitutes for B21597: 979-1A594, 206-484, R12059. Substitute compatibility should be verified for your specific system.

What is the NSN for B21597?

B21597 is cataloged in the U.S. Government catalog under NSN 5360-00-316-4558. This indicates validated use in U.S. government and defense supply chains.

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B21597 — SPRING,HELICAL,TORSION

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