PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21218Spring,helical,compression

Unison Industries Llc · NSN 5360-00-612-1510 · FSC 5360 · No Item Name Available
Verified by PartsTable
NSN 5360-00-612-1510 — this item is cataloged by the U.S. Government under National Stock Number 5360-00-612-1510. Primary manufacturer part number: 21218.
Features
  • Spring,helical,compression — FSC 5360
  • Style Designator: CYLINDRICAL
  • Coil Quantity: 6
  • Material: STEEL UNS K08500 OVERALL
  • Spring Free Outside Diameter: 0.180 INCHES NOMINAL IN
  • End Style: SPRING END,SQUARED AND GROUND BOTH ENDS
  • Coil Helix Direction: RIGHT-HAND OR LEFT-HAND
  • Material Document and Classification: QQ-W-470 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Applications
  • Mechanical energy storage
  • Vibration dampening
  • Return mechanism operation
  • Applications requiring Steel Uns K08500 Overall construction
General Description

The Spring,helical,compression, cataloged under National Stock Number 5360-00-612-1510, is classified within Federal Supply Class 5360 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Unison Industries Llc. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5360-00-612-1510
Primary Part Number21218
Item NameSpring,helical,compression
FSC / FSG5360 / 53 — No Item Name Available
ManufacturerUnison Industries Llc
StatusACTIVE
Style DesignatorCYLINDRICAL
Coil Quantity6
MaterialSTEEL UNS K08500 OVERALL
Spring Free Outside Diameter0.180 INCHES NOMINAL IN
End StyleSPRING END,SQUARED AND GROUND BOTH ENDS
Coil Helix DirectionRIGHT-HAND OR LEFT-HAND
Material Document and ClassificationQQ-W-470 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Inside Diameter0.124 INCHES NOMINAL IN
Spring Free Length0.562 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5330-00-297-988921218 INTERCHANGEABLE
Seal,plain Encased
Skf Usa Inc. Dba Skf Aerospace Sealing Solutions
5930-00-496-4580 INTERCHANGEABLE
Switch,toggle
5360-00-675-924815486 INTERCHANGEABLE
Spring,helical,extension
Cadillac Gage Textron Inc.
1430-00-794-62231JA2637H08 INTERCHANGEABLE
Shaft,seal Air
Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp
3010-00-919-5233 INTERCHANGEABLE
Coupling,shaft,flexible
5970-01-098-615621218 INTERCHANGEABLE
Insulator,plate
Smiths Aerospace, Inc., Electronic Systems-Grand Rapids
5962-01-205-4880 INTERCHANGEABLE
Microcircuit,digital
2530-01-238-028821218 INTERCHANGEABLE
Wheel Assembly,pneumatic Tire
Saginaw Products Corporation Dba Cignys
6550-01-359-5094R21218 INTERCHANGEABLE
Ferric Chloride Solution
Remel Inc.
5950-01-413-243721218 INTERCHANGEABLE
Coil,radio Frequency
Vanguard Electronics, Llc
Cross-Reference Index
Part NumberManufacturer
21218 Unison Industries Llc (USA)
21218 Amphenol Corp Div Amphenol Aerospace Operations (USA)
50A4412 San Antonio Air Logistics Center (USA)
21218 Mason Electric Co. Dba Mason Controls (USA)
Related Parts
5330-00-297-9889INTERCHANGEABLE
SEAL,PLAIN ENCASED
21218
5930-00-496-4580INTERCHANGEABLE
SWITCH,TOGGLE
5360-00-675-9248INTERCHANGEABLE
SPRING,HELICAL,EXTENSION
15486
1430-00-794-6223INTERCHANGEABLE
SHAFT,SEAL AIR
1JA2637H08
3010-00-919-5233INTERCHANGEABLE
COUPLING,SHAFT,FLEXIBLE
5970-01-098-6156INTERCHANGEABLE
INSULATOR,PLATE
21218
5962-01-205-4880INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
2530-01-238-0288INTERCHANGEABLE
WHEEL ASSEMBLY,PNEUMATIC TIRE
21218
6550-01-359-5094INTERCHANGEABLE
FERRIC CHLORIDE SOLUTION
R21218
5950-01-413-2437INTERCHANGEABLE
COIL,RADIO FREQUENCY
21218
3040-01-417-4978INTERCHANGEABLE
SHAFT,SHOULDERED
21218-1001-1
5940-01-418-5087INTERCHANGEABLE
TERMINAL BOARD
21218

Frequently Asked Questions

What is NSN 5360-00-612-1510?

NSN 5360-00-612-1510 is a Spring,helical,compression, manufactured by Unison Industries Llc, classified under FSC 5360 (No Item Name Available). Status: active.

What are the part numbers for NSN 5360-00-612-1510?

NSN 5360-00-612-1510 has 4 cross-referenced part numbers: 21218 (Unison Industries Llc), 21218 (Amphenol Corp Div Amphenol Aerospace Operations), 50A4412 (San Antonio Air Logistics Center), 21218 (Mason Electric Co. Dba Mason Controls).

What NSN replaces 5360-00-612-1510?

There are 12 known substitutes for 5360-00-612-1510: 5330-00-297-9889, 5930-00-496-4580, 5360-00-675-9248 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21218?

Key specifications for 21218: Style Designator: CYLINDRICAL; Coil Quantity: 6; Material: STEEL UNS K08500 OVERALL; Spring Free Outside Diameter: 0.180 INCHES NOMINAL IN. 9 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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