PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

17742Ammeter

Simpson Electric Company, Inc. · NSN 6625-01-242-7974 · FSC 6625 · No Item Name Available
Verified by PartsTable
NSN 6625-01-242-7974 — this item is cataloged by the U.S. Government under National Stock Number 6625-01-242-7974. Primary manufacturer part number: 17742.
Features
  • Ammeter — FSC 6625
  • Circuit Current for Which Designed: AC
  • Meter Depth Behind Mounting Flange: 1.340 INCHES NOMINAL IN
  • Mounting Stud Length: 0.660 INCHES NOMINAL IN
  • Panel for Which Designed: MAGNETIC OR NONMAGNETIC
  • Accuracy in Percent: -2.0 TO 2.0 AT FULL SCALE SINGLE INDICATOR SINGLE RANGE
  • Meter Body Diameter Behind Mounting Flange: 2.690 INCHES NOMINAL IN
  • Measurement Range: +0.0 TO 2.0 AMPERES, AC SINGLE INDICATOR SINGLE RANGE
Applications
  • Applications requiring Plastic construction
General Description

The Ammeter, cataloged under National Stock Number 6625-01-242-7974, 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 3 commercial cross-references from 2 manufacturers, 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
NSN6625-01-242-7974
Primary Part Number17742
Item NameAmmeter
FSC / FSG6625 / 66 — No Item Name Available
ManufacturerSimpson Electric Company, Inc.
StatusACTIVE
Circuit Current for Which DesignedAC
Meter Depth Behind Mounting Flange1.340 INCHES NOMINAL IN
Mounting Stud Length0.660 INCHES NOMINAL IN
Panel for Which DesignedMAGNETIC OR NONMAGNETIC
Accuracy in Percent-2.0 TO 2.0 AT FULL SCALE SINGLE INDICATOR SINGLE RANGE
Meter Body Diameter Behind Mounting Flange2.690 INCHES NOMINAL IN
Measurement Range+0.0 TO 2.0 AMPERES, AC SINGLE INDICATOR SINGLE RANGE
Circuit Construction TypeNONELECTRONIC
FSC Application DataTEST SET,ELECT. EQUIP.
Mounting Stud Diameter0.138 INCHES NOMINAL IN
Power SourceEXTERNAL
Features ProvidedKNIFE EDGE POINTER AND MAGNETIC SHIELD AND ZERO ADJUSTER
Mounting Facility Type and Quantity4 THREADED STUD(S)
Movement Suspension MethodTAUT BAND
Circuit Attachment Method and Quantity2 THREADED STUD
Scale Graduation TypeNONLINEAR SINGLE INDICATOR SINGLE RANGE
Scale Selection MethodTERMINAL
Pointer ColorBLACK SINGLE INDICATOR SINGLE RANGE
MaterialPLASTIC
Style DesignatorRECTANGULAR FLUSH MTG
ColorUNABLE TO DECODE
Center to Center Distance Between Mounting Facilities Parallel to Width3.570 INCHES NOMINAL IN
Mounting Arrangement StyleFOUR HOLE/STUD RECTANGULAR/SQUARE
Indicator TypeDIAL W/POINTER
Movement TypeMOVING IRON VANE
Dial Scale Marking ColorBLACK SINGLE INDICATOR SINGLE RANGE
Frequency Rating60.0 HERTZ NOMINAL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Unit of IssueEA
SMR CodeJ
Verified Substitutes 6
6150-01-134-912117742 INTERCHANGEABLE
Cable Assembly,power,electrical
Belden Wire & Cable Company Llc Dba Belden Cdt Electronics Division
4410-01-238-625017742 INTERCHANGEABLE
Heater,water,electric
The Electric Heater Co Dba Hubbell Electric Heater Co.
5310-01-351-279017742 INTERCHANGEABLE
Nut,self-Locking,hexagon
Coffin Turbo Pump Inc
6150-01-451-762517742 INTERCHANGEABLE
Cable Assembly,power,electrical
Altex Electronics Ltd
5330-01-512-4594BLUE GYLON 3565 INTERCHANGEABLE
Gasket
The Electric Heater Co Dba Hubbell Electric Heater Co.
4520-01-514-6967XFB24443ES INTERCHANGEABLE
Heating Element,electrical,immer
The Electric Heater Co Dba Hubbell Electric Heater Co.
Cross-Reference Index
Part NumberManufacturer
2154-4.517742 Simpson Electronics Inc (USA)
17742 PRIMARY Simpson Electric Company, Inc. (USA)
2154-17742 Simpson Electric Company, Inc. (USA)
Related Parts
6150-01-134-9121INTERCHANGEABLE
CABLE ASSEMBLY,POWER,ELECTRICAL
17742
4410-01-238-6250INTERCHANGEABLE
HEATER,WATER,ELECTRIC
17742
5310-01-351-2790INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
17742
6150-01-451-7625INTERCHANGEABLE
CABLE ASSEMBLY,POWER,ELECTRICAL
17742
5330-01-512-4594INTERCHANGEABLE
GASKET
BLUE GYLON 3565
4520-01-514-6967INTERCHANGEABLE
HEATING ELEMENT,ELECTRICAL,IMMER
XFB24443ES

Frequently Asked Questions

What is NSN 6625-01-242-7974?

NSN 6625-01-242-7974 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 6625-01-242-7974?

NSN 6625-01-242-7974 has 3 cross-referenced part numbers: 2154-4.517742 (Simpson Electronics Inc), 17742 (Simpson Electric Company, Inc.), 2154-17742 (Simpson Electric Company, Inc.).

What NSN replaces 6625-01-242-7974?

There are 6 known substitutes for 6625-01-242-7974: 6150-01-134-9121, 4410-01-238-6250, 5310-01-351-2790 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 17742?

Key specifications for 17742: Overall Length: 2.550 INCHES NOMINAL IN; Circuit Current for Which Designed: AC; Meter Depth Behind Mounting Flange: 1.340 INCHES NOMINAL IN; Mounting Stud Length: 0.660 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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