PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

66628-1Switch Plunger,actuator

L3harris Technologies, Inc. Div Space and Airborne Systems · NSN 3950-01-056-5368 · FSC 3950 · No Item Name Available
Verified by PartsTable
NSN 3950-01-056-5368 — this item is cataloged by the U.S. Government under National Stock Number 3950-01-056-5368. Primary manufacturer part number: 66628-1.
Features
  • Switch Plunger,actuator — FSC 3950
  • General Characteristics Item Description: STEEL CASE; PAINTED GRAY; PLASTIC/NYLON/ SPRING LOADED PLUNGER; W/INTERNAL STEEL ACTUATOR ARM; W/SMALL SPRING LOADED PLASTIC PLUNGER; 1.660 IN. W; 4.375 O/A H; 5.115 IN. O/A LG IN
  • 3 verified cross-references
  • Primary manufacturer: L3harris Technologies, Inc. Div Space and Airborne Systems
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Switch Plunger,actuator, cataloged under National Stock Number 3950-01-056-5368, is classified within Federal Supply Class 3950 (No Item Name Available) of the Materials Handling Equipment group. The primary manufacturer of record is L3harris Technologies, Inc. Div Space and Airborne Systems. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3950-01-056-5368
Primary Part Number66628-1
Item NameSwitch Plunger,actuator
FSC / FSG3950 / 39 — No Item Name Available
ManufacturerL3harris Technologies, Inc. Div Space and Airborne Systems
StatusACTIVE
General Characteristics Item DescriptionSTEEL CASE; PAINTED GRAY; PLASTIC/NYLON/ SPRING LOADED PLUNGER; W/INTERNAL STEEL ACTUATOR ARM; W/SMALL SPRING LOADED PLASTIC PLUNGER; 1.660 IN. W; 4.375 O/A H; 5.115 IN. O/A LG IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
2940-00-830-6546C194 INTERCHANGEABLE
Filter Element,fluid
Honeywell International Inc Dba Honeywell Div Consumer Products Group
2520-01-425-950666628 INTERCHANGEABLE
Control Assembly,transmission
Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic
Cross-Reference Index
Part NumberManufacturer
66628-1 PRIMARY L3harris Technologies, Inc. Div Space and Airborne Systems (USA)
66628 Department of the Navy Naval Undersea Warfare Center New London Div (USA)
C-194 PRIMARY Huestis Machine Corp (USA)
Related Parts
2940-00-830-6546INTERCHANGEABLE
FILTER ELEMENT,FLUID
C194
2520-01-425-9506INTERCHANGEABLE
CONTROL ASSEMBLY,TRANSMISSION
66628

Frequently Asked Questions

What is NSN 3950-01-056-5368?

NSN 3950-01-056-5368 is a Switch Plunger,actuator, manufactured by L3harris Technologies, Inc. Div Space and Airborne Systems, classified under FSC 3950 (No Item Name Available). Status: active.

What are the part numbers for NSN 3950-01-056-5368?

NSN 3950-01-056-5368 has 3 cross-referenced part numbers: 66628-1 (L3harris Technologies, Inc. Div Space and Airborne Systems), 66628 (Department of the Navy Naval Undersea Warfare Center New London Div), C-194 (Huestis Machine Corp).

What NSN replaces 3950-01-056-5368?

There are 2 known substitutes for 3950-01-056-5368: 2940-00-830-6546, 2520-01-425-9506. Verify interchangeability with system specifications before substitution.

What are the specifications of 66628-1?

Key specifications for 66628-1: General Characteristics Item Description: STEEL CASE; PAINTED GRAY; PLASTIC/NYLON/ SPRING LOADED PLUNGER; W/INTERNAL STEEL ACTUATOR ARM; W/SMALL SPRING LOADED PLASTIC PLUNGER; 1.660 IN. W; 4.375 O/A H; 5.115 IN. O/A LG IN. 1 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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