PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

125Voltmeter

Simpson Electric Company, Inc. · NSN 6625-00-643-1755 · FSC 6625 · No Item Name Available
Verified by PartsTable
NSN 6625-00-643-1755 — this item is cataloged by the U.S. Government under National Stock Number 6625-00-643-1755. Primary manufacturer part number: 125.
Features
  • Voltmeter — FSC 6625
  • Overall Diameter: 2.695 INCHES MAXIMUM IN
  • Mounting Hole Diameter: 0.125 INCHES NOMINAL IN
  • Circuit Attachment Method and Quantity: 2 THREADED STUD
  • Meter Depth Behind Mounting Flange: 1.438 INCHES NOMINAL IN
  • Mounting Bolt Circle Diameter: 2.312 INCHES NOMINAL IN
  • Scale Graduation Type: LINEAR SINGLE INDICATOR ALL RANGES
  • FSC Application Data: TEST SET,ELECT. EQUIP.
Applications
  • Applications requiring Plastic construction
General Description

The Voltmeter, cataloged under National Stock Number 6625-00-643-1755, 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 29 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references 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. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN6625-00-643-1755
Primary Part Number125
Item NameVoltmeter
FSC / FSG6625 / 66 — No Item Name Available
ManufacturerSimpson Electric Company, Inc.
StatusACTIVE
Overall Diameter2.695 INCHES MAXIMUM IN
Mounting Hole Diameter0.125 INCHES NOMINAL IN
Circuit Attachment Method and Quantity2 THREADED STUD
Meter Depth Behind Mounting Flange1.438 INCHES NOMINAL IN
Mounting Bolt Circle Diameter2.312 INCHES NOMINAL IN
Scale Graduation TypeLINEAR SINGLE INDICATOR ALL RANGES
FSC Application DataTEST SET,ELECT. EQUIP.
Sensitivity Rating2000.0 OHMS PER VOLT
Movement Suspension MethodJEWEL PIVOT BASE
Mounting Facility Type and Quantity3 UNTHREADED HOLE(S)
Nuclear Hardness Critical FeatureNONHARDENED
Measurement Range+0.0 TO 600.0 VOLTS, DC SINGLE INDICATOR SECOND RANGE
Style DesignatorROUND FLUSH MTG
Movement TypeMOVING COIL, PERMANENT MAGNET
Accuracy in Percent-2.0 TO 2.0 AT FULL SCALE SINGLE INDICATOR ALL RANGES
ColorUNABLE TO DECODE
Scale Division Quantity30 SINGLE INDICATOR ALL RANGES
Meter Body Diameter Behind Mounting Flange2.210 INCHES MAXIMUM IN
Features ProvidedMAGNETIC SHIELD AND ZERO ADJUSTER
Installation DesignPANEL
Indicator TypeDIAL W/POINTER
Mounting Arrangement StyleTHREE HOLE/STUD BOLT CIRCLE
Dial Scale Marking ColorBLACK SINGLE INDICATOR ALL RANGES
Power SourceEXTERNAL
Pointer ColorBLACK SINGLE INDICATOR ALL RANGES
Measurement Range+0.0 TO 15.0 VOLTS, DC SINGLE INDICATOR FIRST RANGE
MaterialPLASTIC
Circuit Current for Which DesignedDC
Overall Diameter2.695 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Unit of IssueEA
SMR CodeX
Verified Substitutes 10
5999-00-069-1793101-15 SUCCESSOR
Heat Sink,electrical-Electronic
General Dynamics Mission Systems, Inc. Dba Gdms
6625-00-233-468082-178 SUCCESSOR
Meter,audio Level
Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple
Generator,signal
6625-00-017-8867125 INTERCHANGEABLE
Generator,signal
L3harris Technologies, Inc. Dba Harris Corp Div Antenna Products
6625-00-255-012004194 INTERCHANGEABLE
Ammeter
Simpson Electric Company, Inc.
6625-00-736-8586289Z14D2 INTERCHANGEABLE
Voltmeter
Morris Material Handling, Inc.
6625-00-767-4255125-01500 INTERCHANGEABLE
Ammeter
Simpson Electric Company, Inc.
5965-00-829-6884F-69-GD INTERCHANGEABLE
Loudspeaker,permanent Magnet
Misco/minneapolis Speaker Company, Inc.
6625-00-849-9456 INTERCHANGEABLE
Ammeter
6625-01-180-0391 INTERCHANGEABLE
Ammeter
Cross-Reference Index
Part NumberManufacturer
125 Simpson Electric Company, Inc. (USA)
SK107SPEC1031-2M0D12 Simpson Electric Company, Inc. (USA)
125-0-15 0-600VDC Simpson Electric Company, Inc. (USA)
SK107 Simpson Electric Company, Inc. (USA)
Related Parts
5999-00-069-1793SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
101-15
6625-00-233-4680SUCCESSOR
METER,AUDIO LEVEL
82-178
6625-01-068-1212SUCCESSOR
GENERATOR,SIGNAL
6625-00-017-8867INTERCHANGEABLE
GENERATOR,SIGNAL
125
6625-00-255-0120INTERCHANGEABLE
AMMETER
04194
6625-00-736-8586INTERCHANGEABLE
VOLTMETER
289Z14D2
6625-00-767-4255INTERCHANGEABLE
AMMETER
125-01500
5965-00-829-6884INTERCHANGEABLE
LOUDSPEAKER,PERMANENT MAGNET
F-69-GD
6625-00-849-9456INTERCHANGEABLE
AMMETER
6625-01-180-0391INTERCHANGEABLE
AMMETER

Frequently Asked Questions

What is NSN 6625-00-643-1755?

NSN 6625-00-643-1755 is a Voltmeter, manufactured by Simpson Electric Company, Inc., classified under FSC 6625 (No Item Name Available). Status: active.

What are the part numbers for NSN 6625-00-643-1755?

NSN 6625-00-643-1755 has 4 cross-referenced part numbers: 125 (Simpson Electric Company, Inc.), SK107SPEC1031-2M0D12 (Simpson Electric Company, Inc.), 125-0-15 0-600VDC (Simpson Electric Company, Inc.), SK107 (Simpson Electric Company, Inc.).

What NSN replaces 6625-00-643-1755?

There are 10 known substitutes for 6625-00-643-1755: 5999-00-069-1793, 6625-00-233-4680, 6625-01-068-1212 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 125?

Key specifications for 125: Overall Diameter: 2.695 INCHES MAXIMUM IN; Mounting Hole Diameter: 0.125 INCHES NOMINAL IN; Circuit Attachment Method and Quantity: 2 THREADED STUD; Meter Depth Behind Mounting Flange: 1.438 INCHES NOMINAL IN. 30 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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