PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

20129Spring,helical,extension

Unipress Corporation · NSN 5360-00-072-0903 · FSC 5360 · No Item Name Available
Verified by PartsTable
NSN 5360-00-072-0903 — this item is cataloged by the U.S. Government under National Stock Number 5360-00-072-0903. Primary manufacturer part number: 20129.
Features
  • Spring,helical,extension — FSC 5360
  • Inside Diameter: 1.313 INCHES NOMINAL IN
  • Spring Deflection Rate: 6.300 POUNDS PER INCH NOMINAL LBS
  • Style Designator: CYLINDRICAL
  • Spring Length Under Load: 18.375 INCHES MAXIMUM IN
  • Design Type: CLOSED
  • Surface Treatment: ENAMEL OVERALL
  • Coil Helix Direction: RIGHT-HAND OR LEFT-HAND
Applications
  • Mechanical energy storage
  • Vibration dampening
  • Return mechanism operation
  • Applications requiring Steel Corrosion Resisting Overall construction
General Description

The Spring,helical,extension, cataloged under National Stock Number 5360-00-072-0903, is classified within Federal Supply Class 5360 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Unipress Corporation. Government technical data includes 11 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5360-00-072-0903
Primary Part Number20129
Item NameSpring,helical,extension
FSC / FSG5360 / 53 — No Item Name Available
ManufacturerUnipress Corporation
StatusACTIVE
Inside Diameter1.313 INCHES NOMINAL IN
Spring Deflection Rate6.300 POUNDS PER INCH NOMINAL LBS
Style DesignatorCYLINDRICAL
Spring Length Under Load18.375 INCHES MAXIMUM IN
Design TypeCLOSED
Surface TreatmentENAMEL OVERALL
Coil Helix DirectionRIGHT-HAND OR LEFT-HAND
MaterialSTEEL CORROSION RESISTING OVERALL
Spring Free Outside Diameter1.625 INCHES NOMINAL IN
Coil Quantity43
Load Rating85.00 POUNDS NOMINAL LBS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5999-00-035-8708 INTERCHANGEABLE
Contact,electrical
3110-00-100-6171 INTERCHANGEABLE
Ball,bearing
5133-00-228-1378 INTERCHANGEABLE
Drill,twist
5930-00-508-0562 INTERCHANGEABLE
Switch,rotary
5950-00-645-309020129 INTERCHANGEABLE
Transformer,power Autotransforme
Freed Transformer Co
5342-00-998-2817 INTERCHANGEABLE
Boot,drain Tub
7025-01-063-60395200-357 INTERCHANGEABLE
Intermediate Drive Assembly
Raytheon Company Div Rmd Strategic
5360-01-196-680120129 INTERCHANGEABLE
Spring,helical,compression
Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems
1650-01-219-095720129 INTERCHANGEABLE
Cap Assembly,pump
Parker Hannifin Corporation Div Hydraulic Systems Division
5310-01-219-5408123W10969-11 INTERCHANGEABLE
Washer,flat
Northrop Grumman Systems Corporation
Cross-Reference Index
Part NumberManufacturer
20129 PRIMARY Unipress Corporation (USA)
Related Parts
5999-00-035-8708INTERCHANGEABLE
CONTACT,ELECTRICAL
3110-00-100-6171INTERCHANGEABLE
BALL,BEARING
5133-00-228-1378INTERCHANGEABLE
DRILL,TWIST
5930-00-508-0562INTERCHANGEABLE
SWITCH,ROTARY
5950-00-645-3090INTERCHANGEABLE
TRANSFORMER,POWER AUTOTRANSFORME
20129
5342-00-998-2817INTERCHANGEABLE
BOOT,DRAIN TUB
7025-01-063-6039INTERCHANGEABLE
INTERMEDIATE DRIVE ASSEMBLY
5200-357
5360-01-196-6801INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
20129
1650-01-219-0957INTERCHANGEABLE
CAP ASSEMBLY,PUMP
20129
5310-01-219-5408INTERCHANGEABLE
WASHER,FLAT
123W10969-11
5360-01-334-9940INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
20129
5935-01-342-3115INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
G350543-1

Frequently Asked Questions

What is NSN 5360-00-072-0903?

NSN 5360-00-072-0903 is a Spring,helical,extension, manufactured by Unipress Corporation, classified under FSC 5360 (No Item Name Available). Status: active.

What are the part numbers for NSN 5360-00-072-0903?

NSN 5360-00-072-0903 has 1 cross-referenced part number: 20129 (Unipress Corporation).

What NSN replaces 5360-00-072-0903?

There are 12 known substitutes for 5360-00-072-0903: 5999-00-035-8708, 3110-00-100-6171, 5133-00-228-1378 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 20129?

Key specifications for 20129: Inside Diameter: 1.313 INCHES NOMINAL IN; Spring Deflection Rate: 6.300 POUNDS PER INCH NOMINAL LBS; Special Features: TAB ENDS WITH 0.500 IN. DIA HOLES IN; Style Designator: CYLINDRICAL. 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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