PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

31771Spring,helical,extension

Turnbull Enterprises, Inc. · NSN 5360-01-378-8603 · FSC 5360 · No Item Name Available
Verified by PartsTable
NSN 5360-01-378-8603 — this item is cataloged by the U.S. Government under National Stock Number 5360-01-378-8603. Primary manufacturer part number: 31771.
Features
  • Spring,helical,extension — FSC 5360
  • Inside Diameter: 0.274 INCHES NOMINAL IN
  • Stock Diameter: 0.038 INCHES NOMINAL IN
  • Coil Helix Direction: LEFT-HAND
  • Material: STEEL COMP 302 OVERALL
  • Design Type: MAINSPRING
  • Opening Width: 0.625 INCHES NOMINAL BOTH ENDS IN
  • Spring Free Length: 7.250 INCHES NOMINAL IN
Applications
  • Mechanical energy storage
  • Vibration dampening
  • Return mechanism operation
  • Applications requiring Steel Comp 302 Overall construction
General Description

The Spring,helical,extension, cataloged under National Stock Number 5360-01-378-8603, is classified within Federal Supply Class 5360 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Turnbull Enterprises, Inc.. Government technical data includes 14 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. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5360-01-378-8603
Primary Part Number31771
Item NameSpring,helical,extension
FSC / FSG5360 / 53 — No Item Name Available
ManufacturerTurnbull Enterprises, Inc.
StatusACTIVE
Inside Diameter0.274 INCHES NOMINAL IN
Stock Diameter0.038 INCHES NOMINAL IN
Coil Helix DirectionLEFT-HAND
MaterialSTEEL COMP 302 OVERALL
Design TypeMAINSPRING
Opening Width0.625 INCHES NOMINAL BOTH ENDS IN
Spring Free Length7.250 INCHES NOMINAL IN
Surface TreatmentPASSIVATE OVERALL
Coil Quantity132
End StyleMACHINE LOOP BOTH ENDS
Spring Free Outside Diameter0.312 INCHES NOMINAL IN
Hook Radius0.125 INCHES NOMINAL BOTH ENDS IN
Coil to Hook Inside Length0.875 INCHES NOMINAL BOTH ENDS IN
Style DesignatorCYLINDRICAL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
5940-00-048-2707 INTERCHANGEABLE
Terminal Board
5940-00-636-791030457 INTERCHANGEABLE
Terminal,lug
Power Control Devices, Inc.
5940-00-681-786310015366-059 INTERCHANGEABLE
Terminal,lug
Us Army Aviation and Missile Command
5985-01-087-828631771 INTERCHANGEABLE
Adapter Ceiling
Andrew Llc
5340-01-202-406631771 INTERCHANGEABLE
Retainer,helical Compression Spr
Jay-Em Aerospace Corporation
6625-01-434-51153177-1 INTERCHANGEABLE
Interconnecting Box
Tech Resources, Inc
Cross-Reference Index
Part NumberManufacturer
31771 Turnbull Enterprises, Inc. (USA)
Related Parts
5940-00-048-2707INTERCHANGEABLE
TERMINAL BOARD
5940-00-636-7910INTERCHANGEABLE
TERMINAL,LUG
30457
5940-00-681-7863INTERCHANGEABLE
TERMINAL,LUG
10015366-059
5985-01-087-8286INTERCHANGEABLE
ADAPTER CEILING
31771
5340-01-202-4066INTERCHANGEABLE
RETAINER,HELICAL COMPRESSION SPR
31771
6625-01-434-5115INTERCHANGEABLE
INTERCONNECTING BOX
3177-1

Frequently Asked Questions

What is NSN 5360-01-378-8603?

NSN 5360-01-378-8603 is a Spring,helical,extension, manufactured by Turnbull Enterprises, Inc., classified under FSC 5360 (No Item Name Available). Status: active.

What are the part numbers for NSN 5360-01-378-8603?

NSN 5360-01-378-8603 has 1 cross-referenced part number: 31771 (Turnbull Enterprises, Inc.).

What NSN replaces 5360-01-378-8603?

There are 6 known substitutes for 5360-01-378-8603: 5940-00-048-2707, 5940-00-636-7910, 5940-00-681-7863 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 31771?

Key specifications for 31771: Inside Diameter: 0.274 INCHES NOMINAL IN; Stock Diameter: 0.038 INCHES NOMINAL IN; Coil Helix Direction: LEFT-HAND; Material: STEEL COMP 302 OVERALL. 14 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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