PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21661Ammeter

Simpson Electric Company, Inc. · NSN 6625-01-434-6882 · FSC 6625 · No Item Name Available
Verified by PartsTable
NSN 6625-01-434-6882 — this item is cataloged by the U.S. Government under National Stock Number 6625-01-434-6882. Primary manufacturer part number: 21661.
Features
  • Ammeter — FSC 6625
  • Circuit Current for Which Designed: DC
  • Installation Design: PANEL
  • Frequency Rating: 50.0 HERTZ MINIMUM AND 400.0 HERTZ MAXIMUM
  • Measurement Range: +0.0 TO 1.0 AMPERES, DC SINGLE INDICATOR SINGLE RANGE
  • Operating Voltage Rating in Volts: 108.0 AC MINIMUM AND 132.0 AC MAXIMUM
  • Accuracy in Percent: -2.0 TO 2.0 AT FULL SCALE SINGLE INDICATOR SINGLE RANGE
  • Power Source: EXTERNAL
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Ammeter, cataloged under National Stock Number 6625-01-434-6882, is classified within Federal Supply Class 6625 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Simpson Electric Company, Inc.. Government technical data includes 16 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
NSN6625-01-434-6882
Primary Part Number21661
Item NameAmmeter
FSC / FSG6625 / 66 — No Item Name Available
ManufacturerSimpson Electric Company, Inc.
StatusACTIVE
Circuit Current for Which DesignedDC
Installation DesignPANEL
Frequency Rating50.0 HERTZ MINIMUM AND 400.0 HERTZ MAXIMUM
Measurement Range+0.0 TO 1.0 AMPERES, DC SINGLE INDICATOR SINGLE RANGE
Operating Voltage Rating in Volts108.0 AC MINIMUM AND 132.0 AC MAXIMUM
Accuracy in Percent-2.0 TO 2.0 AT FULL SCALE SINGLE INDICATOR SINGLE RANGE
Power SourceEXTERNAL
Indicator TypeDIAL W/POINTER
Circuit Current for Which DesignedDC
Installation DesignPANEL
Frequency Rating50.0 HERTZ MINIMUM AND 400.0 HERTZ MAXIMUM
Measurement Range+0.0 TO 1.0 AMPERES, DC SINGLE INDICATOR SINGLE RANGE
Operating Voltage Rating in Volts108.0 AC MINIMUM AND 132.0 AC MAXIMUM
Accuracy in Percent-2.0 TO 2.0 AT FULL SCALE SINGLE INDICATOR SINGLE RANGE
Power SourceEXTERNAL
Indicator TypeDIAL W/POINTER
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
Mounting Pad,electrical-Electron
6130-00-092-5625 INTERCHANGEABLE
Power Supply
4320-00-163-107199121661 INTERCHANGEABLE
Pump,rotary
Alfa Laval Inc
4720-00-447-353821661 INTERCHANGEABLE
Hose Assembly,nonmetallic
Dressta North America Ltd
6610-00-544-555121661 INTERCHANGEABLE
Cover,plug
Undersea Sensor Systems Inc Div Ultra Sonobuoy Systems
1440-00-956-53802166-1 INTERCHANGEABLE
Cable Drum Assembly
Nammo Defense Systems Inc. Dba Nammo Defense Systems Inc
5330-01-117-408021661 INTERCHANGEABLE
Gasket
Forenta Lp
5305-01-188-049021661 INTERCHANGEABLE
Screw,assy. Vent
Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems
5360-01-196-401821661 INTERCHANGEABLE
Spring,helical,extension
Barnes Group Inc. Dba Barnes Distribution
5340-01-330-560221661 INTERCHANGEABLE
Seat,helical Compression Spring
Parker Hannifin Corporation Div Hydraulic Systems Division
Cross-Reference Index
Part NumberManufacturer
21661 PRIMARY Simpson Electric Company, Inc. (USA)
Related Parts
5999-00-920-3734SUCCESSOR
MOUNTING PAD,ELECTRICAL-ELECTRON
6130-00-092-5625INTERCHANGEABLE
POWER SUPPLY
4320-00-163-1071INTERCHANGEABLE
PUMP,ROTARY
99121661
4720-00-447-3538INTERCHANGEABLE
HOSE ASSEMBLY,NONMETALLIC
21661
6610-00-544-5551INTERCHANGEABLE
COVER,PLUG
21661
1440-00-956-5380INTERCHANGEABLE
CABLE DRUM ASSEMBLY
2166-1
5330-01-117-4080INTERCHANGEABLE
GASKET
21661
5305-01-188-0490INTERCHANGEABLE
SCREW,ASSY. VENT
21661
5360-01-196-4018INTERCHANGEABLE
SPRING,HELICAL,EXTENSION
21661
5340-01-330-5602INTERCHANGEABLE
SEAT,HELICAL COMPRESSION SPRING
21661

Frequently Asked Questions

What is NSN 6625-01-434-6882?

NSN 6625-01-434-6882 is a Ammeter, manufactured by Simpson Electric Company, Inc., classified under FSC 6625 (No Item Name Available). Status: active.

What are the part numbers for NSN 6625-01-434-6882?

NSN 6625-01-434-6882 has 1 cross-referenced part number: 21661 (Simpson Electric Company, Inc.).

What NSN replaces 6625-01-434-6882?

There are 10 known substitutes for 6625-01-434-6882: 5999-00-920-3734, 6130-00-092-5625, 4320-00-163-1071 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21661?

Key specifications for 21661: Circuit Current for Which Designed: DC; Installation Design: PANEL; Frequency Rating: 50.0 HERTZ MINIMUM AND 400.0 HERTZ MAXIMUM; Special Features: SEALED METAL CASE, GLASS WINDOW. 18 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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