PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

HM3Voltmeter

Jewell Instruments Llc · NSN 6625-00-228-8823 · FSC 6625 · No Item Name Available
Verified by PartsTable
NSN 6625-00-228-8823 — this item is cataloged by the U.S. Government under National Stock Number 6625-00-228-8823. Primary manufacturer part number: HM3.
Features
  • Voltmeter — FSC 6625
  • Features Provided: ZERO ADJUSTER
  • Mounting Facility Type and Quantity: 3 UNTHREADED HOLE(S)
  • Mounting Hole Diameter: 0.150 INCHES NOMINAL IN
  • Circuit Current for Which Designed: DC
  • Scale Selection Method: TERMINAL
  • Power Source: EXTERNAL
  • Circuit Attachment Method and Quantity: 2 SOLDER LUG
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Voltmeter, cataloged under National Stock Number 6625-00-228-8823, is classified within Federal Supply Class 6625 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Jewell Instruments Llc. Government technical data includes 29 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
NSN6625-00-228-8823
Primary Part NumberHM3
Item NameVoltmeter
FSC / FSG6625 / 66 — No Item Name Available
ManufacturerJewell Instruments Llc
StatusACTIVE
Features ProvidedZERO ADJUSTER
Mounting Facility Type and Quantity3 UNTHREADED HOLE(S)
Mounting Hole Diameter0.150 INCHES NOMINAL IN
Circuit Current for Which DesignedDC
Scale Selection MethodTERMINAL
Power SourceEXTERNAL
Circuit Attachment Method and Quantity2 SOLDER LUG
Scale Graduation TypeLINEAR SINGLE INDICATOR SINGLE RANGE
Pointer ColorBLACK SINGLE INDICATOR SINGLE RANGE
Overall Diameter3.500 INCHES NOMINAL IN
Mounting Bolt Circle Diameter3.160 INCHES NOMINAL IN
Mounting Arrangement StyleTHREE HOLE/STUD BOLT CIRCLE
Meter Body Diameter Behind Mounting Flange2.675 INCHES NOMINAL IN
Accuracy in Percent-2.0 TO 2.0 AT FULL SCALE SINGLE INDICATOR SINGLE RANGE
Movement Suspension MethodJEWEL PIVOT BASE
Measurement Range+0.0 TO 35.0 VOLTS, DC SINGLE INDICATOR SINGLE RANGE
Installation DesignPANEL
Scale Division Quantity35 SINGLE INDICATOR SINGLE RANGE
Movement TypeMOVING COIL, PERMANENT MAGNET
Meter Depth Behind Mounting Flange1.063 INCHES NOMINAL IN
Indicator TypeDIAL W/POINTER
ColorUNABLE TO DECODE
Dial Scale Marking ColorBLACK SINGLE INDICATOR SINGLE RANGE
Style DesignatorROUND FLUSH MTG
Nuclear Hardness Critical FeatureNONHARDENED
Sensitivity Rating100.0 OHMS PER VOLT
FSC Application DataTEST SET,ELECT. EQUIP.
Mounting Facility Type and Quantity3 UNTHREADED HOLE(S)
Mounting Hole Diameter0.150 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
6625-00-088-910692025-01 SUCCESSOR
Meter,modulation
Agilent Technologies, Inc. Div Agilent Technologies Headquarters
6625-00-255-5806232-71 SUCCESSOR
Voltmeter
Jewell Instruments Llc
6625-00-649-4962702053-1REVC SUCCESSOR
Meter,replacement
L3harris Technologies, Inc. Dba Harris Corporation
6625-00-187-1788 INTERCHANGEABLE
Ammeter
6625-00-221-2576 INTERCHANGEABLE
Multimeter
6625-00-256-0600 INTERCHANGEABLE
Test Set,electron Tube
6625-00-539-8473 INTERCHANGEABLE
Voltmeter
6625-00-539-8814 INTERCHANGEABLE
Ammeter
6625-00-539-9722 INTERCHANGEABLE
Test Set,electron Tube
6625-00-668-50681309 INTERCHANGEABLE
Ammeter
Jewell Instruments Llc
Cross-Reference Index
Part NumberManufacturer
HM3 Jewell Instruments Llc (USA)
Related Parts
6625-00-088-9106SUCCESSOR
METER,MODULATION
92025-01
6625-00-255-5806SUCCESSOR
VOLTMETER
232-71
6625-00-649-4962SUCCESSOR
METER,REPLACEMENT
702053-1REVC
6625-00-187-1788INTERCHANGEABLE
AMMETER
6625-00-221-2576INTERCHANGEABLE
MULTIMETER
6625-00-256-0600INTERCHANGEABLE
TEST SET,ELECTRON TUBE
6625-00-539-8473INTERCHANGEABLE
VOLTMETER
6625-00-539-8814INTERCHANGEABLE
AMMETER
6625-00-539-9722INTERCHANGEABLE
TEST SET,ELECTRON TUBE
6625-00-668-5068INTERCHANGEABLE
AMMETER
1309
6625-00-669-0757INTERCHANGEABLE
WATTMETER
350TYPE270
6625-00-669-5068INTERCHANGEABLE
AMMETER

Frequently Asked Questions

What is NSN 6625-00-228-8823?

NSN 6625-00-228-8823 is a Voltmeter, manufactured by Jewell Instruments Llc, classified under FSC 6625 (No Item Name Available). Status: active.

What are the part numbers for NSN 6625-00-228-8823?

NSN 6625-00-228-8823 has 1 cross-referenced part number: HM3 (Jewell Instruments Llc).

What NSN replaces 6625-00-228-8823?

There are 12 known substitutes for 6625-00-228-8823: 6625-00-088-9106, 6625-00-255-5806, 6625-00-649-4962 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of HM3?

Key specifications for HM3: Features Provided: ZERO ADJUSTER; Mounting Facility Type and Quantity: 3 UNTHREADED HOLE(S); Mounting Hole Diameter: 0.150 INCHES NOMINAL IN; Circuit Current for Which Designed: DC. 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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