PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4950-4Spring,helical,compression

Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives · NSN 5360-01-021-9770 · FSC 5360 · No Item Name Available
Verified by PartsTable
NSN 5360-01-021-9770 — this item is cataloged by the U.S. Government under National Stock Number 5360-01-021-9770. Primary manufacturer part number: 4950-4.
Features
  • Spring,helical,compression — FSC 5360
  • Material Document and Classification: SAE,TYPE 18-8 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
  • Coil Quantity: 5-1/2
  • Inside Diameter: 0.750 INCHES NOMINAL IN
  • Coil Helix Direction: RIGHT-HAND
  • Spring Free Length: 1.937 INCHES MINIMUM AND 1.999 INCHES MAXIMUM IN
  • Material: STEEL COMP 302 OVERALL
  • Stock Diameter: 0.125 INCHES NOMINAL IN
Applications
  • Mechanical energy storage
  • Vibration dampening
  • Return mechanism operation
  • Applications requiring Steel Comp 302 Overall construction
General Description

The Spring,helical,compression, cataloged under National Stock Number 5360-01-021-9770, is classified within Federal Supply Class 5360 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives. 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. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5360-01-021-9770
Primary Part Number4950-4
Item NameSpring,helical,compression
FSC / FSG5360 / 53 — No Item Name Available
ManufacturerSiemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives
StatusACTIVE
Material Document and ClassificationSAE,TYPE 18-8 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Coil Quantity5-1/2
Inside Diameter0.750 INCHES NOMINAL IN
Coil Helix DirectionRIGHT-HAND
Spring Free Length1.937 INCHES MINIMUM AND 1.999 INCHES MAXIMUM IN
MaterialSTEEL COMP 302 OVERALL
Stock Diameter0.125 INCHES NOMINAL IN
Spring Solid Outside Diameter1.000 INCHES NOMINAL IN
Spring Free Outside Diameter1.000 INCHES NOMINAL IN
End StyleSPRING END,SQUARED AND GROUND BOTH ENDS
Style DesignatorCYLINDRICAL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
5330-00-285-3425114659 INTERCHANGEABLE
Gasket
Borgwarner Pds (anderson), L.l.c.
8040-01-216-750849504 INTERCHANGEABLE
Adhesive
Loctite Corp
5930-01-296-227249504 INTERCHANGEABLE
Switch Subassembly
Setra Systems, Inc. Dba Gems Sensors
Cross-Reference Index
Part NumberManufacturer
4950-4 PRIMARY Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives (USA)
Related Parts
5330-00-285-3425INTERCHANGEABLE
GASKET
114659
8040-01-216-7508INTERCHANGEABLE
ADHESIVE
49504
5930-01-296-2272INTERCHANGEABLE
SWITCH SUBASSEMBLY
49504

Frequently Asked Questions

What is NSN 5360-01-021-9770?

NSN 5360-01-021-9770 is a Spring,helical,compression, manufactured by Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives, classified under FSC 5360 (No Item Name Available). Status: active.

What are the part numbers for NSN 5360-01-021-9770?

NSN 5360-01-021-9770 has 1 cross-referenced part number: 4950-4 (Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives).

What NSN replaces 5360-01-021-9770?

There are 3 known substitutes for 5360-01-021-9770: 5330-00-285-3425, 8040-01-216-7508, 5930-01-296-2272. Verify interchangeability with system specifications before substitution.

What are the specifications of 4950-4?

Key specifications for 4950-4: Material Document and Classification: SAE,TYPE 18-8 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Coil Quantity: 5-1/2; Inside Diameter: 0.750 INCHES NOMINAL IN; Coil Helix Direction: RIGHT-HAND. 11 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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