PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21504Spring,helical,torsion

Cessna Aircraft Co Arc Avionics Div · NSN 5360-00-863-3743 · FSC 5360 · No Item Name Available
Verified by PartsTable
NSN 5360-00-863-3743 — this item is cataloged by the U.S. Government under National Stock Number 5360-00-863-3743. Primary manufacturer part number: 21504.
Features
  • Spring,helical,torsion — FSC 5360
  • End Length From Second Bend to Third Bend or End: 0.145 INCHES NOMINAL OVERALL IN
  • End Style: OFFSET HALF LOOP, LEFT END FIRST END
  • End Style: OFFSET HINGE END, LEFT SIDE SECOND END
  • Hook Opening Width: 0.047 INCHES NOMINAL OVERALL IN
  • Spring Free Outside Diameter: 0.321 INCHES NOMINAL IN
  • Hook Radius: 0.047 INCHES NOMINAL BOTH ENDS IN
  • Hook Radius: 0.062 INCHES NOMINAL FIRST END IN
Applications
  • Mechanical energy storage
  • Vibration dampening
  • Return mechanism operation
General Description

The Spring,helical,torsion, cataloged under National Stock Number 5360-00-863-3743, is classified within Federal Supply Class 5360 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Cessna Aircraft Co Arc Avionics Div. Government technical data includes 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5360-00-863-3743
Primary Part Number21504
Item NameSpring,helical,torsion
FSC / FSG5360 / 53 — No Item Name Available
ManufacturerCessna Aircraft Co Arc Avionics Div
StatusACTIVE
End Length From Second Bend to Third Bend or End0.145 INCHES NOMINAL OVERALL IN
End StyleOFFSET HALF LOOP, LEFT END FIRST END
End StyleOFFSET HINGE END, LEFT SIDE SECOND END
Hook Opening Width0.047 INCHES NOMINAL OVERALL IN
Spring Free Outside Diameter0.321 INCHES NOMINAL IN
Hook Radius0.047 INCHES NOMINAL BOTH ENDS IN
Hook Radius0.062 INCHES NOMINAL FIRST END IN
End Angular RelationshipENDS ANGLED ONE TO OTHER
Coil Helix DirectionRIGHT-HAND
Style DesignatorSINGLE TORSION LEFT HAND
Spring Free Length0.321 INCHES NOMINAL IN
Inside Diameter0.281 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
5330-00-004-33622-1504 INTERCHANGEABLE
Seal
Scotsman Industries Inc Div Scotsman Ice Systems
5120-00-223-101821504 INTERCHANGEABLE
Punch,drive Pin
Mayhew Steel Products Inc
6610-00-939-259821504 INTERCHANGEABLE
Pointer Assy
Aerosonic Llc
5930-00-961-124810105984 INTERCHANGEABLE
Switch,thermostatic
Us Army Aviation and Missile Command
6150-01-100-0932 INTERCHANGEABLE
Bus,conductor
6515-01-221-0303 INTERCHANGEABLE
Bulb,otoscope
1680-01-344-0242872-029-001 INTERCHANGEABLE
Display Assembly
Parker-Hannifin Corporation Dba Pneutronics Div Fluid Systems Division
5940-01-363-1746900681-001 INTERCHANGEABLE
Terminal Strip,grounding
U S Dept of Transportation Federal Aviation Administration
2920-01-381-4497AH140605 INTERCHANGEABLE
Switch,safety,neutral Start
Deere & Company Dba Deere John Co
6620-01-698-915321504 INTERCHANGEABLE
Gage
Bird-Johnson Propeller Company, Llc
Cross-Reference Index
Part NumberManufacturer
21504 Cessna Aircraft Co Arc Avionics Div (USA)
Related Parts
5330-00-004-3362INTERCHANGEABLE
SEAL
2-1504
5120-00-223-1018INTERCHANGEABLE
PUNCH,DRIVE PIN
21504
6610-00-939-2598INTERCHANGEABLE
POINTER ASSY
21504
5930-00-961-1248INTERCHANGEABLE
SWITCH,THERMOSTATIC
10105984
6150-01-100-0932INTERCHANGEABLE
BUS,CONDUCTOR
6515-01-221-0303INTERCHANGEABLE
BULB,OTOSCOPE
1680-01-344-0242INTERCHANGEABLE
DISPLAY ASSEMBLY
872-029-001
5940-01-363-1746INTERCHANGEABLE
TERMINAL STRIP,GROUNDING
900681-001
2920-01-381-4497INTERCHANGEABLE
SWITCH,SAFETY,NEUTRAL START
AH140605
6620-01-698-9153INTERCHANGEABLE
GAGE
21504

Frequently Asked Questions

What is NSN 5360-00-863-3743?

NSN 5360-00-863-3743 is a Spring,helical,torsion, manufactured by Cessna Aircraft Co Arc Avionics Div, classified under FSC 5360 (No Item Name Available). Status: active.

What are the part numbers for NSN 5360-00-863-3743?

NSN 5360-00-863-3743 has 1 cross-referenced part number: 21504 (Cessna Aircraft Co Arc Avionics Div).

What NSN replaces 5360-00-863-3743?

There are 10 known substitutes for 5360-00-863-3743: 5330-00-004-3362, 5120-00-223-1018, 6610-00-939-2598 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21504?

Key specifications for 21504: End Length From Second Bend to Third Bend or End: 0.145 INCHES NOMINAL OVERALL IN; End Style: OFFSET HALF LOOP, LEFT END FIRST END; End Style: OFFSET HINGE END, LEFT SIDE SECOND END; Hook Opening Width: 0.047 INCHES NOMINAL OVERALL IN. 12 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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