PartsTable
Technical Data Sheet
Download PDF

721398-21 — SPRING,HELICAL,COMPRESSION

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

721398-21: SPRING,HELICAL,COMPRESSION.

The SPRING,HELICAL,COMPRESSION is a the manufacturer industrial component. Key specifications include material: STEEL UNS K06501 OVERALL, end_style: SPRING END,SQUARED BOTH ENDS, coil_quantity: 29, inside_diameter: 0.898 INCHES MINIMUM AND 0.928 INCHES MAXIMUM IN, style_designator: CYLINDRICAL, surface_treatment: CADMIUM AND CHROMATE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5360-00-832-1644, 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
721398-21
NSN: 5360-00-832-1644
FSC: 5360 — Coil, Flat, Leaf, and Wire Springs
CAGE: 05869 — RAYTHEON COMPANY DIV RMD STRATEGIC (USA)
SPECIFICATIONS
materialSTEEL UNS K06501 OVERALL
end_styleSPRING END,SQUARED BOTH ENDS
coil_quantity29
inside_diameter0.898 INCHES MINIMUM AND 0.928 INCHES MAXIMUM IN
style_designatorCYLINDRICAL
surface_treatmentCADMIUM AND CHROMATE OVERALL
spring_free_length9.880 INCHES MINIMUM AND 10.120 INCHES MAXIMUM IN
spring_solid_length3.160 INCHES NOMINAL IN
coil_helix_directionRIGHT-HAND OR LEFT-HAND
spring_free_outside_diameter1.110 INCHES MINIMUM AND 1.140 INCHES MAXIMUM IN
material_document_and_classificationAASTM A227 ASSN STD 1ST MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationQQ-P-416,TYPE 2,CLASS 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5360-00-832-1644
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SPRING,HELICAL,COMPRESSION TITLE COMPONENT PN 721398-21 MFR SPRING,HELICAL,COMPRES
KEY FEATURES
•
SPRING FREE OUTSIDE DIAMETER: 1.110 INCHES MINIMUM AND 1.140 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TYPE 2,CLASS 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
END STYLE: SPRING END,SQUARED BOTH ENDS
•
SPRING SOLID LENGTH: 3.160 INCHES NOMINAL IN
•
STYLE DESIGNATOR: CYLINDRICAL
•
MATERIAL DOCUMENT AND CLASSIFICATION: AASTM A227 ASSN STD 1ST MATERIAL RESPONSE OVERALL
•
SPRING FREE LENGTH: 9.880 INCHES MINIMUM AND 10.120 INCHES MAXIMUM IN
•
INSIDE DIAMETER: 0.898 INCHES MINIMUM AND 0.928 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
SPRING FREE OUTSIDE DIAMETER1.110 INCHES MINIMUM AND 1.140 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TYPE 2,CLASS 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
END STYLESPRING END,SQUARED BOTH ENDS
SPRING SOLID LENGTH3.160 INCHES NOMINAL IN
STYLE DESIGNATORCYLINDRICAL
MATERIAL DOCUMENT AND CLASSIFICATIONAASTM A227 ASSN STD 1ST MATERIAL RESPONSE OVERALL
SPRING FREE LENGTH9.880 INCHES MINIMUM AND 10.120 INCHES MAXIMUM IN
INSIDE DIAMETER0.898 INCHES MINIMUM AND 0.928 INCHES MAXIMUM IN
COIL QUANTITY29
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
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
307Reference 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
Ready to buy 721398-21?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 721398-21?
721398-21 is a SPRING,HELICAL,COMPRESSION.
What parts can replace 721398-21?
There is 1 known substitute for 721398-21: 307. Substitute compatibility should be verified for your specific system.
What is the NSN for 721398-21?
721398-21 is cataloged in the U.S. Government catalog under NSN 5360-00-832-1644. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 721398-21

✓ 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.