PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

HM3Ammeter

Jewell Instruments Llc · NSN 6625-00-669-5068 · FSC 6625 · No Item Name Available
Verified by PartsTable
NSN 6625-00-669-5068 — this item is cataloged by the U.S. Government under National Stock Number 6625-00-669-5068. Primary manufacturer part number: HM3.
Features
  • Ammeter — FSC 6625
  • Features Provided: ZERO ADJUSTER
  • Movement Type: MOVING COIL, PERMANENT MAGNET
  • Scale Division Quantity: 40 SINGLE INDICATOR SINGLE RANGE
  • Scale Graduation Type: LINEAR SINGLE INDICATOR SINGLE RANGE
  • Mounting Facility Type and Quantity: 3 UNTHREADED HOLE(S)
  • Measurement Range: -100.0 TO 100.0 MILLIAMPERES, DC SINGLE INDICATOR SINGLE RANGE
  • FSC Application Data: TEST SET,ELECTRONIC EQUIPMENT
Applications
  • Applications requiring Plastic or Steel construction
General Description

The Ammeter, cataloged under National Stock Number 6625-00-669-5068, 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 28 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. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN6625-00-669-5068
Primary Part NumberHM3
Item NameAmmeter
FSC / FSG6625 / 66 — No Item Name Available
ManufacturerJewell Instruments Llc
StatusACTIVE
Features ProvidedZERO ADJUSTER
Movement TypeMOVING COIL, PERMANENT MAGNET
Scale Division Quantity40 SINGLE INDICATOR SINGLE RANGE
Scale Graduation TypeLINEAR SINGLE INDICATOR SINGLE RANGE
Mounting Facility Type and Quantity3 UNTHREADED HOLE(S)
Measurement Range-100.0 TO 100.0 MILLIAMPERES, DC SINGLE INDICATOR SINGLE RANGE
FSC Application DataTEST SET,ELECTRONIC EQUIPMENT
Style DesignatorROUND FLUSH MTG
Meter Depth Behind Mounting Flange1.063 INCHES NOMINAL IN
Mounting Hole Diameter0.150 INCHES NOMINAL IN
Installation DesignPANEL
Nuclear Hardness Critical FeatureNONHARDENED
Environmental ProtectionDUST RESISTANT
Sensitivity Rating150.0 MILLIVOLTS
Circuit Current for Which DesignedDC
Indicator TypeDIAL W/POINTER
Circuit Attachment Method and Quantity2 SOLDER LUG
Overall Diameter3.500 INCHES NOMINAL IN
Meter Body Diameter Behind Mounting Flange2.675 INCHES NOMINAL IN
Panel for Which DesignedNONMAGNETIC
Mounting Arrangement StyleTHREE HOLE/STUD BOLT CIRCLE
ColorUNABLE TO DECODE
MaterialPLASTIC OR STEEL
Dial Scale Marking ColorBLACK SINGLE INDICATOR SINGLE RANGE
Accuracy in Percent-2.0 TO 2.0 AT FULL SCALE SINGLE INDICATOR SINGLE RANGE
Movement Suspension MethodJEWEL PIVOT BASE
Circuit Construction TypeNONELECTRONIC
Pointer ColorBLACK SINGLE INDICATOR SINGLE RANGE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Unit of IssueEA
SMR CodeY
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
6625-00-228-8823 INTERCHANGEABLE
Voltmeter
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
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
6625-00-228-8823INTERCHANGEABLE
VOLTMETER
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

Frequently Asked Questions

What is NSN 6625-00-669-5068?

NSN 6625-00-669-5068 is a Ammeter, manufactured by Jewell Instruments Llc, classified under FSC 6625 (No Item Name Available). Status: active.

What are the part numbers for NSN 6625-00-669-5068?

NSN 6625-00-669-5068 has 1 cross-referenced part number: HM3 (Jewell Instruments Llc).

What NSN replaces 6625-00-669-5068?

There are 12 known substitutes for 6625-00-669-5068: 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; Movement Type: MOVING COIL, PERMANENT MAGNET; Scale Division Quantity: 40 SINGLE INDICATOR SINGLE RANGE; Scale Graduation Type: LINEAR SINGLE INDICATOR SINGLE RANGE. 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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