PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2740Ammeter

Simpson Electric Company, Inc. · NSN 6625-00-891-4148 · FSC 6625 · No Item Name Available
Verified by PartsTable
NSN 6625-00-891-4148 — this item is cataloged by the U.S. Government under National Stock Number 6625-00-891-4148. Primary manufacturer part number: 2740.
Features
  • Ammeter — FSC 6625
  • Measurement Range: +0.0 TO 100.0 AMPERES, DC SINGLE INDICATOR SINGLE RANGE
  • Mounting Facility Type and Quantity: 4 THREADED STUD(S)
  • Center to Center Distance Between Mounting Facilities Parallel to Width: 2.240 INCHES NOMINAL IN
  • Circuit Attachment Method and Quantity: 2 THREADED STUD
  • Color: UNABLE TO DECODE
  • Style Designator: FAN SHAPE FLUSH MTG
  • Mounting Arrangement Style: FOUR HOLE/STUD RECTANGULAR/SQUARE
Applications
  • Applications requiring Plastic construction
General Description

The Ammeter, cataloged under National Stock Number 6625-00-891-4148, is classified within Federal Supply Class 6625 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Simpson Electric Company, Inc.. 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.

Technical Specifications
ParameterValue
NSN6625-00-891-4148
Primary Part Number2740
Item NameAmmeter
FSC / FSG6625 / 66 — No Item Name Available
ManufacturerSimpson Electric Company, Inc.
StatusACTIVE
Measurement Range+0.0 TO 100.0 AMPERES, DC SINGLE INDICATOR SINGLE RANGE
Mounting Facility Type and Quantity4 THREADED STUD(S)
Center to Center Distance Between Mounting Facilities Parallel to Width2.240 INCHES NOMINAL IN
Circuit Attachment Method and Quantity2 THREADED STUD
ColorUNABLE TO DECODE
Style DesignatorFAN SHAPE FLUSH MTG
Mounting Arrangement StyleFOUR HOLE/STUD RECTANGULAR/SQUARE
Meter Depth Behind Mounting Flange1.078 INCHES NOMINAL IN
Dial Scale Marking ColorBLACK SINGLE INDICATOR SINGLE RANGE
MaterialPLASTIC
Meter Body Diameter Behind Mounting Flange2.734 INCHES NOMINAL IN
Movement TypeMOVING COIL, PERMANENT MAGNET
Scale Division Quantity50 SINGLE INDICATOR SINGLE RANGE
Installation DesignPANEL
Movement Suspension MethodJEWEL PIVOT BASE
Circuit Current for Which DesignedDC
Center to Center Distance Between Mounting Facilities Parallel to Length2.240 INCHES NOMINAL IN
Sensitivity Rating10.0 OHMS
Accuracy in Percent-2.0 TO 2.0 AT FULL SCALE SINGLE INDICATOR SINGLE RANGE
Mounting Stud Diameter0.112 INCHES NOMINAL IN
Measurement Range+0.0 TO 100.0 AMPERES, DC SINGLE INDICATOR SINGLE RANGE
Mounting Facility Type and Quantity4 THREADED STUD(S)
Center to Center Distance Between Mounting Facilities Parallel to Width2.240 INCHES NOMINAL IN
Circuit Attachment Method and Quantity2 THREADED STUD
ColorUNABLE TO DECODE
Style DesignatorFAN SHAPE FLUSH MTG
Mounting Arrangement StyleFOUR HOLE/STUD RECTANGULAR/SQUARE
Meter Depth Behind Mounting Flange1.078 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
2530-00-139-4058390934C91 INTERCHANGEABLE
Parts Kit,hydraulic Brake Master
Navistar Intl Corp Truck Br Ohio Plant
3110-00-155-8879136539-16 INTERCHANGEABLE
Bearing,ball,annular
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5331-00-250-1208 INTERCHANGEABLE
O-Ring
5935-00-475-753927-40 INTERCHANGEABLE
Adapter,connector
Amphenol Corporation Div Amphenol Rf
5935-00-501-6853 INTERCHANGEABLE
Connector,receptacle,electrical
3030-00-528-3831 INTERCHANGEABLE
Belt,v
3030-00-528-4629 INTERCHANGEABLE
Belt,v
3030-00-528-4632 INTERCHANGEABLE
Belt,v
5905-00-834-37712740 INTERCHANGEABLE
Resistor,fixed,wire Wound
Ohmite Holding, L.l.c. Dba Ohmite Manufacturing
5340-01-259-39512740 INTERCHANGEABLE
Button,plug
Heyco Inc Dba Heyco Products
Cross-Reference Index
Part NumberManufacturer
2740 Simpson Electric Company, Inc. (USA)
Related Parts
2530-00-139-4058INTERCHANGEABLE
PARTS KIT,HYDRAULIC BRAKE MASTER
390934C91
3110-00-155-8879INTERCHANGEABLE
BEARING,BALL,ANNULAR
136539-16
5331-00-250-1208INTERCHANGEABLE
O-RING
5935-00-475-7539INTERCHANGEABLE
ADAPTER,CONNECTOR
27-40
5935-00-501-6853INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
3030-00-528-3831INTERCHANGEABLE
BELT,V
3030-00-528-4629INTERCHANGEABLE
BELT,V
3030-00-528-4632INTERCHANGEABLE
BELT,V
5905-00-834-3771INTERCHANGEABLE
RESISTOR,FIXED,WIRE WOUND
2740
5340-01-259-3951INTERCHANGEABLE
BUTTON,PLUG
2740
5305-01-533-9915INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
2740
6530-01-548-2656INTERCHANGEABLE
STAND,BASIN
MILS36423

Frequently Asked Questions

What is NSN 6625-00-891-4148?

NSN 6625-00-891-4148 is a Ammeter, manufactured by Simpson Electric Company, Inc., classified under FSC 6625 (No Item Name Available). Status: active.

What are the part numbers for NSN 6625-00-891-4148?

NSN 6625-00-891-4148 has 1 cross-referenced part number: 2740 (Simpson Electric Company, Inc.).

What NSN replaces 6625-00-891-4148?

There are 12 known substitutes for 6625-00-891-4148: 2530-00-139-4058, 3110-00-155-8879, 5331-00-250-1208 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 2740?

Key specifications for 2740: Measurement Range: +0.0 TO 100.0 AMPERES, DC SINGLE INDICATOR SINGLE RANGE; Mounting Facility Type and Quantity: 4 THREADED STUD(S); Center to Center Distance Between Mounting Facilities Parallel to Width: 2.240 INCHES NOMINAL IN; Circuit Attachment Method and Quantity: 2 THREADED STUD. 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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