PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A124Ammeter

Sigma Instruments Inc · NSN 6625-00-983-0744 · FSC 6625 · No Item Name Available
Verified by PartsTable
NSN 6625-00-983-0744 — this item is cataloged by the U.S. Government under National Stock Number 6625-00-983-0744. Primary manufacturer part number: A124.
Features
  • Ammeter — FSC 6625
  • Center to Center Distance Between Mounting Facilities Parallel to Width: 2.250 INCHES NOMINAL IN
  • Mounting Facility Type and Quantity: 4 THREADED STUD(S)
  • Measurement Range: -2.5 TO 2.5 MILLIAMPERES, DC SINGLE INDICATOR FIRST RANGE
  • Features Provided: ZERO ADJUSTER
  • Dial Scale Marking Color: BLACK SINGLE INDICATOR SINGLE RANGE
  • Sensitivity Rating: 1000.0 MILLIVOLTS
  • Circuit Attachment Method and Quantity: 2 THREADED STUD
Applications
  • Applications requiring Plastic construction
General Description

The Ammeter, cataloged under National Stock Number 6625-00-983-0744, is classified within Federal Supply Class 6625 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Sigma Instruments Inc. Government technical data includes 26 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. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN6625-00-983-0744
Primary Part NumberA124
Item NameAmmeter
FSC / FSG6625 / 66 — No Item Name Available
ManufacturerSigma Instruments Inc
StatusACTIVE
Center to Center Distance Between Mounting Facilities Parallel to Width2.250 INCHES NOMINAL IN
Mounting Facility Type and Quantity4 THREADED STUD(S)
Measurement Range-2.5 TO 2.5 MILLIAMPERES, DC SINGLE INDICATOR FIRST RANGE
Features ProvidedZERO ADJUSTER
Dial Scale Marking ColorBLACK SINGLE INDICATOR SINGLE RANGE
Sensitivity Rating1000.0 MILLIVOLTS
Circuit Attachment Method and Quantity2 THREADED STUD
Scale Division Quantity50 SINGLE INDICATOR SINGLE RANGE
Installation DesignPANEL
Mounting Arrangement StyleFOUR HOLE/STUD RECTANGULAR/SQUARE
Accuracy in Percent-2.0 TO 2.0 AT FULL SCALE SINGLE INDICATOR SINGLE RANGE
Measurement Range-10.0 TO 10.0 MILLIAMPERES, DC SINGLE INDICATOR SECOND RANGE
Mounting Stud Length0.437 INCHES NOMINAL IN
Meter Depth Behind Mounting Flange1.281 INCHES NOMINAL IN
Meter Body Diameter Behind Mounting Flange2.734 INCHES NOMINAL IN
ColorUNABLE TO DECODE
Style DesignatorRECTANGULAR FLUSH MTG
MaterialPLASTIC
Furnished Items and QuantityNUT 4,WASHER 2
Center to Center Distance Between Mounting Facilities Parallel to Length2.250 INCHES NOMINAL IN
Circuit Current for Which DesignedDC
Center to Center Distance Between Mounting Facilities Parallel to Width2.250 INCHES NOMINAL IN
Mounting Facility Type and Quantity4 THREADED STUD(S)
Measurement Range-2.5 TO 2.5 MILLIAMPERES, DC SINGLE INDICATOR FIRST RANGE
Features ProvidedZERO ADJUSTER
Dial Scale Marking ColorBLACK SINGLE INDICATOR SINGLE RANGE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Criticality CodeN
Unit of IssueEA
SMR CodeJN
Verified Substitutes 6
5995-00-225-0730XH1278 INTERCHANGEABLE
Lead,electrical
Heale Manufacturing Co Llc
3455-00-231-347510040 INTERCHANGEABLE
Cutter,milling,plain
Niagara Cutter Inc
3895-00-496-7527A124 INTERCHANGEABLE
Cap,dust,quick Deta
Morrison Brothers Co Dba Morrison Brothers Co
3020-00-618-0085 INTERCHANGEABLE
Gear,spur
5310-00-883-9219361238-1 INTERCHANGEABLE
Nut,plain,hexagon
L3harris Technologies, Inc. Dba Harris Corp Div Antenna Products
4240-01-573-3865 INTERCHANGEABLE
Canister,oxygen Generating,breat
Cross-Reference Index
Part NumberManufacturer
A124 Sigma Instruments Inc (USA)
Related Parts
5995-00-225-0730INTERCHANGEABLE
LEAD,ELECTRICAL
XH1278
3455-00-231-3475INTERCHANGEABLE
CUTTER,MILLING,PLAIN
10040
3895-00-496-7527INTERCHANGEABLE
CAP,DUST,QUICK DETA
A124
3020-00-618-0085INTERCHANGEABLE
GEAR,SPUR
5310-00-883-9219INTERCHANGEABLE
NUT,PLAIN,HEXAGON
361238-1
4240-01-573-3865INTERCHANGEABLE
CANISTER,OXYGEN GENERATING,BREAT

Frequently Asked Questions

What is NSN 6625-00-983-0744?

NSN 6625-00-983-0744 is a Ammeter, manufactured by Sigma Instruments Inc, classified under FSC 6625 (No Item Name Available). Status: active.

What are the part numbers for NSN 6625-00-983-0744?

NSN 6625-00-983-0744 has 1 cross-referenced part number: A124 (Sigma Instruments Inc).

What NSN replaces 6625-00-983-0744?

There are 6 known substitutes for 6625-00-983-0744: 5995-00-225-0730, 3455-00-231-3475, 3895-00-496-7527 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of A124?

Key specifications for A124: Center to Center Distance Between Mounting Facilities Parallel to Width: 2.250 INCHES NOMINAL IN; Mounting Facility Type and Quantity: 4 THREADED STUD(S); Overall Height: 3.000 INCHES NOMINAL IN; Measurement Range: -2.5 TO 2.5 MILLIAMPERES, DC SINGLE INDICATOR FIRST 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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