PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

638-E665Meter,special Scale

Phaostron Instrument and Electronic Company · NSN 6625-01-009-0497 · FSC 6625 · No Item Name Available
Verified by PartsTable
NSN 6625-01-009-0497 — this item is cataloged by the U.S. Government under National Stock Number 6625-01-009-0497. Primary manufacturer part number: 638-E665.
Features
  • Meter,special Scale — FSC 6625
  • Features Provided: ELECTROSTATIC SHIELD AND MAGNETIC SHIELD AND ZERO ADJUSTER
  • Reliability Indicator: ESTABLISHED
  • Mounting Bolt Circle Diameter: 3.160 INCHES NOMINAL IN
  • Mounting Facility Type and Quantity: 3 UNTHREADED HOLE(S)
  • Color: UNABLE TO DECODE
  • Material: STEEL
  • Circuit Attachment Method and Quantity: 2 SOLDER LUG
Applications
  • Applications requiring Steel construction
General Description

The Meter,special Scale, cataloged under National Stock Number 6625-01-009-0497, is classified within Federal Supply Class 6625 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Phaostron Instrument and Electronic Company. Government technical data includes 28 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 6 manufacturers, 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
NSN6625-01-009-0497
Primary Part Number638-E665
Item NameMeter,special Scale
FSC / FSG6625 / 66 — No Item Name Available
ManufacturerPhaostron Instrument and Electronic Company
StatusACTIVE
Features ProvidedELECTROSTATIC SHIELD AND MAGNETIC SHIELD AND ZERO ADJUSTER
Reliability IndicatorESTABLISHED
Mounting Bolt Circle Diameter3.160 INCHES NOMINAL IN
Mounting Facility Type and Quantity3 UNTHREADED HOLE(S)
ColorUNABLE TO DECODE
MaterialSTEEL
Circuit Attachment Method and Quantity2 SOLDER LUG
Circuit Current for Which DesignedDC
Unable to DecodeUNABLE TO DECODE
Nuclear Hardness Critical FeatureNONHARDENED
Overall Diameter3.510 INCHES MAXIMUM IN
FSC Application DataELECTRICAL AND ELECTRONIC PROPERTIES MEASURING AND TESTING INSTRUMENTS
Meter Depth Behind Mounting Flange1.281 INCHES NOMINAL IN
Surface TreatmentENAMEL
Special Test FeaturesMEETS REQUIREMENTS OF ANSI C39.1
Scale Graduation TypeNONLINEAR SINGLE INDICATOR SINGLE RANGE
Mounting Arrangement StyleTHREE HOLE/STUD BOLT CIRCLE
Movement Suspension MethodJEWEL PIVOT BASE
Mounting Hole Diameter0.150 INCHES NOMINAL IN
Movement TypeMOVING COIL, PERMANENT MAGNET
Panel for Which DesignedMAGNETIC OR NONMAGNETIC
Accuracy in Percent-2.0 TO 2.0 AT FULL SCALE SINGLE INDICATOR SINGLE RANGE
Environmental ProtectionDUSTPROOF AND SHOCK RESISTANT AND VIBRATION RESISTANT AND WATER RESISTANT
Dial Scale Marking ColorBLACK SINGLE INDICATOR SINGLE RANGE
Meter Body Diameter Behind Mounting Flange2.800 INCHES NOMINAL IN
Style DesignatorROUND FLUSH MTG
Installation DesignPANEL
Indicator TypeDIAL W/POINTER
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Criticality CodeN
Unit of IssueEA
SMR CodeJF
Weight0.8000 lbs
Cube0.0350 cu ft
Verified Substitutes 12
6625-00-325-09771183016P1 SUCCESSOR
Meter,special Scale
Bae Systems Information and Electronic Systems Integration Inc. Dba Bae Systems
6625-01-128-7574321-HR-0 TO 25VAC RECTIFIED SUCCESSOR
Voltmeter
Triplett (bluffton) Corporation Dba Lfe Instruments
Ammeter
6625-00-056-4544 INTERCHANGEABLE
Meter,replacement
6625-00-068-270520131011-105 INTERCHANGEABLE
Ammeter
Jewell Instruments Llc
6625-00-068-3517 INTERCHANGEABLE
Voltmeter
6625-00-073-998225-801860-3 INTERCHANGEABLE
Voltmeter
General Dynamics Mission Systems, Inc.
6625-00-088-910692025-01 INTERCHANGEABLE
Meter,modulation
Agilent Technologies, Inc. Div Agilent Technologies Headquarters
6625-00-091-9968557955-1 INTERCHANGEABLE
Meter,special Scale
Raytheon Company
6625-00-115-9344 INTERCHANGEABLE
Meter,null
Cross-Reference Index
Part NumberManufacturer
859D651H01 Westinghouse Electric Corp Control Business Unit
859D651H01 Treadwell Corporation (delaware) Dba Treadwell Corp (USA)
638-E665 PRIMARY Phaostron Instrument and Electronic Company (USA)
321HR Triplett (bluffton) Corporation Dba Lfe Instruments (USA)
M-1880 Metermaster Inc Miscorp Div (USA)
HS3Z Jewell Instruments Llc (USA)
Related Parts
6625-00-325-0977SUCCESSOR
METER,SPECIAL SCALE
1183016P1
6625-01-128-7574SUCCESSOR
VOLTMETER
321-HR-0 TO 25VAC RECTIFIED
6625-01-206-9966SUCCESSOR
AMMETER
6625-00-056-4544INTERCHANGEABLE
METER,REPLACEMENT
6625-00-068-2705INTERCHANGEABLE
AMMETER
20131011-105
6625-00-068-3517INTERCHANGEABLE
VOLTMETER
6625-00-073-9982INTERCHANGEABLE
VOLTMETER
25-801860-3
6625-00-088-9106INTERCHANGEABLE
METER,MODULATION
92025-01
6625-00-091-9968INTERCHANGEABLE
METER,SPECIAL SCALE
557955-1
6625-00-115-9344INTERCHANGEABLE
METER,NULL
6625-00-182-7607INTERCHANGEABLE
METER,ARBITRARY SCALE
S20031
6625-00-231-8806INTERCHANGEABLE
VOLTMETER
2836293

Frequently Asked Questions

What is NSN 6625-01-009-0497?

NSN 6625-01-009-0497 is a Meter,special Scale, manufactured by Phaostron Instrument and Electronic Company, classified under FSC 6625 (No Item Name Available). Status: active.

What are the part numbers for NSN 6625-01-009-0497?

NSN 6625-01-009-0497 has 6 cross-referenced part numbers: 859D651H01 (Westinghouse Electric Corp Control Business Unit), 859D651H01 (Treadwell Corporation (delaware) Dba Treadwell Corp), 638-E665 (Phaostron Instrument and Electronic Company), 321HR (Triplett (bluffton) Corporation Dba Lfe Instruments), M-1880 (Metermaster Inc Miscorp Div) and 1 more.

What NSN replaces 6625-01-009-0497?

There are 12 known substitutes for 6625-01-009-0497: 6625-00-325-0977, 6625-01-128-7574, 6625-01-206-9966 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 638-E665?

Key specifications for 638-E665: Features Provided: ELECTROSTATIC SHIELD AND MAGNETIC SHIELD AND ZERO ADJUSTER; Reliability Indicator: ESTABLISHED; Mounting Bolt Circle Diameter: 3.160 INCHES NOMINAL IN; Mounting Facility Type and Quantity: 3 UNTHREADED HOLE(S). 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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