PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1257-02590Ammeter

Simpson Electric Company, Inc. · NSN 6625-00-948-4738 · FSC 6625 · No Item Name Available
Verified by PartsTable
NSN 6625-00-948-4738 — this item is cataloged by the U.S. Government under National Stock Number 6625-00-948-4738. Primary manufacturer part number: 1257-02590.
Features
  • Ammeter — FSC 6625
  • Center to Center Distance Between Mounting Facilities Parallel to Width: 1.880 INCHES NOMINAL IN
  • Circuit Attachment Method and Quantity: 2 BINDING POST
  • Criticality Code Justification: FEAT
  • Scale Division Quantity: 50 SINGLE INDICATOR SINGLE RANGE
  • Mounting Arrangement Style: FOUR HOLE/STUD RECTANGULAR/SQUARE
  • Scale Graduation Type: LINEAR SINGLE INDICATOR SINGLE RANGE
  • Movement Type: MOVING IRON VANE
Applications
  • Applications requiring Plastic construction
General Description

The Ammeter, cataloged under National Stock Number 6625-00-948-4738, 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 27 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN6625-00-948-4738
Primary Part Number1257-02590
Item NameAmmeter
FSC / FSG6625 / 66 — No Item Name Available
ManufacturerSimpson Electric Company, Inc.
StatusCANCELLED
Center to Center Distance Between Mounting Facilities Parallel to Width1.880 INCHES NOMINAL IN
Circuit Attachment Method and Quantity2 BINDING POST
Criticality Code JustificationFEAT
Scale Division Quantity50 SINGLE INDICATOR SINGLE RANGE
Mounting Arrangement StyleFOUR HOLE/STUD RECTANGULAR/SQUARE
Scale Graduation TypeLINEAR SINGLE INDICATOR SINGLE RANGE
Movement TypeMOVING IRON VANE
Accuracy in Percent-2.0 TO 2.0 AT FULL SCALE SINGLE INDICATOR SINGLE RANGE
ColorUNABLE TO DECODE
Installation DesignPANEL
Pointer ColorBLACK SINGLE INDICATOR SINGLE RANGE
MaterialPLASTIC
Measurement Range+0.0 TO 10.0 AMPERES, AC SINGLE INDICATOR SINGLE RANGE
Style DesignatorRECTANGULAR FLUSH MTG
Meter Body Diameter Behind Mounting Flange2.170 INCHES NOMINAL IN
Meter Depth Behind Mounting Flange1.150 INCHES NOMINAL IN
Mounting Facility Type and Quantity4 UNTHREADED HOLE(S)
Indicator TypeDIAL W/POINTER
Circuit Current for Which DesignedAC
Dial Scale Marking ColorBLACK SINGLE INDICATOR SINGLE RANGE
Center to Center Distance Between Mounting Facilities Parallel to Length1.880 INCHES NOMINAL IN
Mounting Hole Diameter0.112 INCHES NOMINAL IN
Center to Center Distance Between Mounting Facilities Parallel to Width1.880 INCHES NOMINAL IN
Circuit Attachment Method and Quantity2 BINDING POST
Criticality Code JustificationFEAT
Scale Division Quantity50 SINGLE INDICATOR SINGLE RANGE
Mounting Arrangement StyleFOUR HOLE/STUD RECTANGULAR/SQUARE
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Shelf Life Code0
Criticality CodeN
Unit of IssueEA
SMR CodeJN
Weight0.5000 lbs
Cube0.0370 cu ft
Verified Substitutes 2
No Item Name Available
6625-01-267-107402590 SUCCESSOR
Ammeter
Simpson Electric Company, Inc.
Cross-Reference Index
Part NumberManufacturer
1257-02590 Simpson Electric Company, Inc. (USA)
1257-10A400CPS Simpson Electric Company, Inc. (USA)
432-0085-003REF The Boeing Company Div Legacy Boeing Hb1 (USA)
1711815-9 Lockheed Martin Corporation Dba Lockheed Martin Div Lockheed Martin (USA)
2590-400CPS Simpson Electric Company, Inc. (USA)
Related Parts
6625-00-947-7545SUCCESSOR
NO ITEM NAME AVAILABLE
6625-01-267-1074SUCCESSOR
AMMETER
02590

Frequently Asked Questions

What is NSN 6625-00-948-4738?

NSN 6625-00-948-4738 is a Ammeter, manufactured by Simpson Electric Company, Inc., classified under FSC 6625 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6625-00-948-4738?

NSN 6625-00-948-4738 has 5 cross-referenced part numbers: 1257-02590 (Simpson Electric Company, Inc.), 1257-10A400CPS (Simpson Electric Company, Inc.), 432-0085-003REF (The Boeing Company Div Legacy Boeing Hb1), 1711815-9 (Lockheed Martin Corporation Dba Lockheed Martin Div Lockheed Martin), 2590-400CPS (Simpson Electric Company, Inc.).

What NSN replaces 6625-00-948-4738?

There are 2 known substitutes for 6625-00-948-4738: 6625-00-947-7545, 6625-01-267-1074. Verify interchangeability with system specifications before substitution.

What are the specifications of 1257-02590?

Key specifications for 1257-02590: Center to Center Distance Between Mounting Facilities Parallel to Width: 1.880 INCHES NOMINAL IN; Circuit Attachment Method and Quantity: 2 BINDING POST; Criticality Code Justification: FEAT; Scale Division Quantity: 50 SINGLE INDICATOR SINGLE RANGE. 30 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6625-00-948-4738 still in active supply?

NSN 6625-00-948-4738 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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