PartsTable TECHNICAL DATA SHEET
AUGUST 2026Technical Data Sheet

640-27Ammeter

American Instrument Corp · NSN 6625-00-538-9035 · FSC 6625 · No Item Name Available
Verified by PartsTable
NSN 6625-00-538-9035 — this item is cataloged by the U.S. Government under National Stock Number 6625-00-538-9035. Primary manufacturer part number: 640-27.
Features
  • Ammeter — FSC 6625
  • Pointer Color: BLACK SINGLE INDICATOR SINGLE RANGE
  • Meter Depth Behind Mounting Flange: 0.980 INCHES NOMINAL IN
  • Material: PLASTIC
  • Installation Design: PANEL
  • Color: UNABLE TO DECODE
  • Accuracy in Percent: -5.0 TO 5.0 AT FULL SCALE SINGLE INDICATOR SINGLE RANGE
  • FSC Application Data: TEST SET,ELECT. EQUIP.
Applications
  • Applications requiring Plastic construction
General Description

The Ammeter, cataloged under National Stock Number 6625-00-538-9035, is classified within Federal Supply Class 6625 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is American Instrument Corp. Government technical data includes 26 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN6625-00-538-9035
Primary Part Number640-27
Item NameAmmeter
FSC / FSG6625 / 66 — No Item Name Available
ManufacturerAmerican Instrument Corp
StatusACTIVE
Pointer ColorBLACK SINGLE INDICATOR SINGLE RANGE
Meter Depth Behind Mounting Flange0.980 INCHES NOMINAL IN
MaterialPLASTIC
Installation DesignPANEL
ColorUNABLE TO DECODE
Accuracy in Percent-5.0 TO 5.0 AT FULL SCALE SINGLE INDICATOR SINGLE RANGE
FSC Application DataTEST SET,ELECT. EQUIP.
Meter Body Diameter Behind Mounting Flange2.750 INCHES NOMINAL IN
Features ProvidedZERO ADJUSTER
Movement TypeMOVING IRON VANE
Panel for Which DesignedNONMAGNETIC
Dial Scale Marking ColorBLACK SINGLE INDICATOR SINGLE RANGE
Measurement Range+0.0 TO 250.0 AMPERES, AC SINGLE INDICATOR SINGLE RANGE
Nuclear Hardness Critical FeatureNONHARDENED
Movement Suspension MethodTAUT BAND
Power SourceEXTERNAL
Circuit Attachment Method and Quantity2 SOLDER STUD
Indicator TypeDIAL W/POINTER
Circuit Construction TypeNONELECTRONIC
Circuit Current for Which DesignedAC
Style DesignatorRECTANGULAR FLUSH MTG
Special MarkingsBOTH SCALE BAND COLORED RED,ZEROS TOP AND BOTTOM LINE FROM 10 TO 50 AND 50 TO 250 COLORED RED
Pointer ColorBLACK SINGLE INDICATOR SINGLE RANGE
Meter Depth Behind Mounting Flange0.980 INCHES NOMINAL IN
MaterialPLASTIC
Installation DesignPANEL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Criticality CodeN
Unit of IssueEA
SMR CodeJN
Weight0.0100 lbs
Cube0.0010 cu ft
Verified Substitutes 4
5915-00-501-00152920137-27 INTERCHANGEABLE
Filter,band Pass
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5950-00-764-418164027 INTERCHANGEABLE
Reactor
Power Paragon Inc Dba Air Borne Power Div Airborne Power
5331-01-253-7141N6402794 INTERCHANGEABLE
O-Ring
Leslie Controls, Inc. Dba Leslie Controls Inc
1005-01-505-1035SP 64027 INTERCHANGEABLE
Bolt,breech
Colt's Manufacturing Company, Llc
Cross-Reference Index
Part NumberManufacturer
640-27 PRIMARY American Instrument Corp (USA)
640-27 Jaidinger Manufacturing Co Inc Dba Jaidinger Manufacturing Co Inc (USA)
Related Parts
5915-00-501-0015INTERCHANGEABLE
FILTER,BAND PASS
2920137-27
5950-00-764-4181INTERCHANGEABLE
REACTOR
64027
5331-01-253-7141INTERCHANGEABLE
O-RING
N6402794
1005-01-505-1035INTERCHANGEABLE
BOLT,BREECH
SP 64027

Frequently Asked Questions

What is NSN 6625-00-538-9035?

NSN 6625-00-538-9035 is a Ammeter, manufactured by American Instrument Corp, classified under FSC 6625 (No Item Name Available). Status: active.

What are the part numbers for NSN 6625-00-538-9035?

NSN 6625-00-538-9035 has 2 cross-referenced part numbers: 640-27 (American Instrument Corp), 640-27 (Jaidinger Manufacturing Co Inc Dba Jaidinger Manufacturing Co Inc).

What NSN replaces 6625-00-538-9035?

There are 4 known substitutes for 6625-00-538-9035: 5915-00-501-0015, 5950-00-764-4181, 5331-01-253-7141 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 640-27?

Key specifications for 640-27: Pointer Color: BLACK SINGLE INDICATOR SINGLE RANGE; Meter Depth Behind Mounting Flange: 0.980 INCHES NOMINAL IN; Material: PLASTIC; Overall Width: 5.750 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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