PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

637Meter,special Scale

Phaostron Instrument and Electronic Company · NSN 6625-01-005-6584 · FSC 6625 · No Item Name Available
Verified by PartsTable
NSN 6625-01-005-6584 — this item is cataloged by the U.S. Government under National Stock Number 6625-01-005-6584. Primary manufacturer part number: 637.
Features
  • Meter,special Scale — FSC 6625
  • Features Provided: ZERO ADJUSTER
  • Circuit Current for Which Designed: AC
  • Scale Graduation Type: NONLINEAR SINGLE INDICATOR ALL RANGES
  • Movement Suspension Method: JEWEL PIVOT BASE
  • Color: UNABLE TO DECODE
  • Style Designator: ROUND FLUSH MTG
  • Unable to Decode: UNABLE TO DECODE
Applications
  • Applications requiring Steel construction
General Description

The Meter,special Scale, cataloged under National Stock Number 6625-01-005-6584, 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 29 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN6625-01-005-6584
Primary Part Number637
Item NameMeter,special Scale
FSC / FSG6625 / 66 — No Item Name Available
ManufacturerPhaostron Instrument and Electronic Company
StatusACTIVE
Features ProvidedZERO ADJUSTER
Circuit Current for Which DesignedAC
Scale Graduation TypeNONLINEAR SINGLE INDICATOR ALL RANGES
Movement Suspension MethodJEWEL PIVOT BASE
ColorUNABLE TO DECODE
Style DesignatorROUND FLUSH MTG
Unable to DecodeUNABLE TO DECODE
MaterialSTEEL
Special MarkingsSEALED DO NOT OPEN RUGGEDIZED ON BACK OF METER
Surface TreatmentCHROMATE
Nuclear Hardness Critical FeatureNONHARDENED
FSC Application DataTEST SET,ELECT. EQUIP.
Mounting Arrangement StyleTHREE HOLE/STUD BOLT CIRCLE
Overall Diameter3.510 INCHES MAXIMUM IN
Mounting Hole Diameter0.138 INCHES NOMINAL IN
Mounting Bolt Circle Diameter3.160 INCHES MAXIMUM IN
Accuracy in Percent-2.0 TO 2.0 AT FULL SCALE SINGLE INDICATOR SINGLE RANGE
Panel for Which DesignedNONMAGNETIC
Movement TypeMOVING IRON VANE
Circuit Attachment Method and Quantity2 SOLDER LUG AND 2 THREADED STUD
Meter Depth Behind Mounting Flange1.390 INCHES MAXIMUM IN
Mounting Facility Type and Quantity3 SCREW AND 3 UNTHREADED HOLE(S)
Meter Body Diameter Behind Mounting Flange2.800 INCHES MAXIMUM IN
Dial Scale Marking ColorBLACK SINGLE INDICATOR ALL RANGES
Indicator TypeDIAL W/POINTER
Sensitivity Rating6.0 AMPERES
Furnished Items and QuantityNUT 5; WASHER 5
Pointer ColorBLACK SINGLE INDICATOR ALL RANGES
Installation DesignPANEL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Unit of IssueEA
SMR CodeJ
Verified Substitutes 8
6625-00-133-7673A265-1100 INTERCHANGEABLE
Ammeter
Essex Electro Engineers Inc
6625-00-179-3847 INTERCHANGEABLE
Ammeter
6625-00-683-9423 INTERCHANGEABLE
Ammeter
6625-00-856-476552681 INTERCHANGEABLE
Ammeter
Stewart & Stevenson Power Products Llc
6625-00-948-016277C707996P001 INTERCHANGEABLE
Voltmeter
Lockheed Martin Corporation Div Rms
6625-01-106-718813217E4129 INTERCHANGEABLE
Meter,special Scale
Cecom Lr Center
5840-01-135-6410 INTERCHANGEABLE
Amplifier,traveling
1240-01-691-5144M637 INTERCHANGEABLE
Sight Unit
Lightforce Usa, Incorporated Div Mil-Gov-Le
Cross-Reference Index
Part NumberManufacturer
637 Phaostron Instrument and Electronic Company (USA)
M637 Mancraft Industries Inc (USA)
2534-2101004 Solartron Electronics Inc Weston Instruments Div (USA)
Related Parts
6625-00-133-7673INTERCHANGEABLE
AMMETER
A265-1100
6625-00-179-3847INTERCHANGEABLE
AMMETER
6625-00-683-9423INTERCHANGEABLE
AMMETER
6625-00-856-4765INTERCHANGEABLE
AMMETER
52681
6625-00-948-0162INTERCHANGEABLE
VOLTMETER
77C707996P001
6625-01-106-7188INTERCHANGEABLE
METER,SPECIAL SCALE
13217E4129
5840-01-135-6410INTERCHANGEABLE
AMPLIFIER,TRAVELING
1240-01-691-5144INTERCHANGEABLE
SIGHT UNIT
M637

Frequently Asked Questions

What is NSN 6625-01-005-6584?

NSN 6625-01-005-6584 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 6625-01-005-6584?

NSN 6625-01-005-6584 has 3 cross-referenced part numbers: 637 (Phaostron Instrument and Electronic Company), M637 (Mancraft Industries Inc), 2534-2101004 (Solartron Electronics Inc Weston Instruments Div).

What NSN replaces 6625-01-005-6584?

There are 8 known substitutes for 6625-01-005-6584: 6625-00-133-7673, 6625-00-179-3847, 6625-00-683-9423 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 637?

Key specifications for 637: Features Provided: ZERO ADJUSTER; Circuit Current for Which Designed: AC; Overall Length: 2.530 INCHES MAXIMUM IN; Scale Graduation Type: NONLINEAR SINGLE INDICATOR ALL RANGES. 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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