PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

16040Ammeter

Simpson Electric Company, Inc. · NSN 6625-00-115-6421 · FSC 6625 · No Item Name Available
Verified by PartsTable
NSN 6625-00-115-6421 — this item is cataloged by the U.S. Government under National Stock Number 6625-00-115-6421. Primary manufacturer part number: 16040.
Features
  • Ammeter — FSC 6625
  • Center to Center Distance Between Mounting Facilities Parallel to Width: 2.250 INCHES NOMINAL IN
  • Installation Design: PANEL
  • Scale Division Quantity: 50 SINGLE INDICATOR SINGLE RANGE
  • Meter Body Diameter Behind Mounting Flange: 2.690 INCHES NOMINAL IN
  • Circuit Current for Which Designed: DC
  • Panel for Which Designed: MAGNETIC
  • Movement Type: MOVING COIL, PERMANENT MAGNET
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Ammeter, cataloged under National Stock Number 6625-00-115-6421, 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 26 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN6625-00-115-6421
Primary Part Number16040
Item NameAmmeter
FSC / FSG6625 / 66 — No Item Name Available
ManufacturerSimpson Electric Company, Inc.
StatusACTIVE
Center to Center Distance Between Mounting Facilities Parallel to Width2.250 INCHES NOMINAL IN
Installation DesignPANEL
Scale Division Quantity50 SINGLE INDICATOR SINGLE RANGE
Meter Body Diameter Behind Mounting Flange2.690 INCHES NOMINAL IN
Circuit Current for Which DesignedDC
Panel for Which DesignedMAGNETIC
Movement TypeMOVING COIL, PERMANENT MAGNET
Sensitivity Rating75.0 MILLIVOLTS
Meter Depth Behind Mounting Flange1.230 INCHES NOMINAL IN
Mounting Facility Type and Quantity4 THREADED STUD(S)
Power SourceEXTERNAL
Movement Suspension MethodJEWEL PIVOT BASE
Measurement Range+0.0 TO 10.0 AMPERES, DC SINGLE INDICATOR SINGLE RANGE
Dial Scale Marking ColorBLACK SINGLE INDICATOR SINGLE RANGE
Mounting Stud Length1.000 INCHES NOMINAL IN
Circuit Construction TypeELECTRONIC, SOLID STATE
Nuclear Hardness Critical FeatureNONHARDENED
Center to Center Distance Between Mounting Facilities Parallel to Length2.250 INCHES NOMINAL IN
Mounting Stud Diameter0.112 INCHES NOMINAL IN
ColorUNABLE TO DECODE
Scale Graduation TypeLINEAR SINGLE INDICATOR SINGLE RANGE
Style DesignatorRECTANGULAR FLUSH MTG
Accuracy in Percent-2.0 TO 2.0 AT FULL SCALE SINGLE INDICATOR SINGLE RANGE
Indicator TypeDIAL W/POINTER
Mounting Arrangement StyleFOUR HOLE/STUD RECTANGULAR/SQUARE
Circuit Attachment Method and Quantity2 THREADED STUD
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Criticality CodeN
Unit of IssueEA
SMR CodeJN
Weight0.9200 lbs
Cube0.0720 cu ft
Verified Substitutes 12
5935-00-114-88457314C INTERCHANGEABLE
Connector,plug,electrical
Hubbell Incorporated (delaware) Dba Wiring Device-Kellems Division
6625-00-115-642016020 INTERCHANGEABLE
Voltmeter
Simpson Electric Company, Inc.
5920-00-221-56843323 INTERCHANGEABLE
Fuseholder,block
Colt's Manufacturing Company, Llc
5950-00-227-9220299628-2 INTERCHANGEABLE
Transformer,audio Frequency
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
4720-00-278-1108 INTERCHANGEABLE
Hose,nonmetallic
6625-00-364-7810772503-1 INTERCHANGEABLE
Voltmeter
Raytheon Company Dba Raytheon
5950-00-419-3989154110 INTERCHANGEABLE
Reactor
Raytheon Company Dba Raytheon Co
5950-00-764-3566718801-068 INTERCHANGEABLE
Reactor
Raytheon Company Div Rmd Strategic
5330-01-072-06633323 INTERCHANGEABLE
Packing,preformed
Measurement Systems Inc
6625-01-076-78333323 INTERCHANGEABLE
Filter,variable Frequency
Krohn-Hite Corp
Cross-Reference Index
Part NumberManufacturer
3323 Simpson Electric Company, Inc. (USA)
67B57652 Engineered Devices Inc (USA)
16040 PRIMARY Simpson Electric Company, Inc. (USA)
Related Parts
5935-00-114-8845INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
7314C
6625-00-115-6420INTERCHANGEABLE
VOLTMETER
16020
5920-00-221-5684INTERCHANGEABLE
FUSEHOLDER,BLOCK
3323
5950-00-227-9220INTERCHANGEABLE
TRANSFORMER,AUDIO FREQUENCY
299628-2
4720-00-278-1108INTERCHANGEABLE
HOSE,NONMETALLIC
6625-00-364-7810INTERCHANGEABLE
VOLTMETER
772503-1
5950-00-419-3989INTERCHANGEABLE
REACTOR
154110
5950-00-764-3566INTERCHANGEABLE
REACTOR
718801-068
5330-01-072-0663INTERCHANGEABLE
PACKING,PREFORMED
3323
6625-01-076-7833INTERCHANGEABLE
FILTER,VARIABLE FREQUENCY
3323
5915-01-090-9656INTERCHANGEABLE
FILTER,BAND PASS
3323
6515-01-094-1273INTERCHANGEABLE
BAG,OSTOMY
3323

Frequently Asked Questions

What is NSN 6625-00-115-6421?

NSN 6625-00-115-6421 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 6625-00-115-6421?

NSN 6625-00-115-6421 has 3 cross-referenced part numbers: 3323 (Simpson Electric Company, Inc.), 67B57652 (Engineered Devices Inc), 16040 (Simpson Electric Company, Inc.).

What NSN replaces 6625-00-115-6421?

There are 12 known substitutes for 6625-00-115-6421: 5935-00-114-8845, 6625-00-115-6420, 5920-00-221-5684 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 16040?

Key specifications for 16040: Center to Center Distance Between Mounting Facilities Parallel to Width: 2.250 INCHES NOMINAL IN; Installation Design: PANEL; Scale Division Quantity: 50 SINGLE INDICATOR SINGLE RANGE; Meter Body Diameter Behind Mounting Flange: 2.690 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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