B21139 — SPRING,HELICAL,COMPRESSION

✓ Government record, cited

— · COMPONENT

PRODUCT OVERVIEW

B21139: SPRING,HELICAL,COMPRESSION.

The SPRING,HELICAL,COMPRESSION is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, end_style: SPRING END,SQUARED AND GROUND BOTH ENDS, coil_quantity: 5 1/2, inside_diameter: 0.500 INCHES NOMINAL IN, style_designator: CYLINDRICAL, spring_free_length: 0.750 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5360-00-316-4569, 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

B21139

NSN: 5360-00-316-4569
FSC: 5360 — Coil, Flat, Leaf, and Wire Springs
CAGE: 92208 — LITTON SYSTEMS INC ITEK OPTICAL SYSTEMS DIV (USA)

SPECIFICATIONS

material	STEEL OVERALL
end_style	SPRING END,SQUARED AND GROUND BOTH ENDS
coil_quantity	5 1/2
inside_diameter	0.500 INCHES NOMINAL IN
style_designator	CYLINDRICAL
spring_free_length	0.750 INCHES NOMINAL IN
coil_helix_direction	RIGHT-HAND
spring_free_outside_diameter	0.594 INCHES NOMINAL IN
spring_solid_outside_diameter	0.594 INCHES NOMINAL IN
material_document_and_classification	MIL-S-6101 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN	5360-00-316-4569

COMPONENT DIAGRAM

KEY FEATURES

•

SPRING FREE OUTSIDE DIAMETER: 0.594 INCHES NOMINAL IN

•

END STYLE: SPRING END,SQUARED AND GROUND BOTH ENDS

•

STYLE DESIGNATOR: CYLINDRICAL

•

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

•

SPRING FREE LENGTH: 0.750 INCHES NOMINAL IN

•

INSIDE DIAMETER: 0.500 INCHES NOMINAL IN

•

SPRING SOLID OUTSIDE DIAMETER: 0.594 INCHES NOMINAL IN

•

COIL QUANTITY: 5 1/2

TECHNICAL CHARACTERISTICS

SPRING FREE OUTSIDE DIAMETER	0.594 INCHES NOMINAL IN
END STYLE	SPRING END,SQUARED AND GROUND BOTH ENDS
STYLE DESIGNATOR	CYLINDRICAL
MATERIAL DOCUMENT AND CLASSIFICATION	MIL-S-6101 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
SPRING FREE LENGTH	0.750 INCHES NOMINAL IN
INSIDE DIAMETER	0.500 INCHES NOMINAL IN
SPRING SOLID OUTSIDE DIAMETER	0.594 INCHES NOMINAL IN
COIL QUANTITY	5 1/2
COIL HELIX DIRECTION	RIGHT-HAND
MATERIAL	STEEL OVERALL

SUBSTITUTES & CROSS-REFERENCES 4

32DH002Reference document

Same NSN cross-reference

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

62081Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

979-1B149Reference document

Same NSN cross-reference

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

5360003164569Reference document

Same NSN cross-reference

Reference document — Informative reference only

LIFECYCLE

NSN statusCancelled· U.S. Government catalog

Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is B21139?

B21139 is a SPRING,HELICAL,COMPRESSION.

What parts can replace B21139?

There are 4 known substitutes for B21139: 32DH002, 62081, 979-1B149 and 1 more. Substitute compatibility should be verified for your specific system.

What is the NSN for B21139?

B21139 is cataloged in the U.S. Government catalog under NSN 5360-00-316-4569. This indicates validated use in U.S. government and defense supply chains.

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B21139 — SPRING,HELICAL,COMPRESSION

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