PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

04220Ammeter

Simpson Electric Company, Inc. · NSN 6625-00-926-6903 · FSC 6625 · No Item Name Available
Verified by PartsTable
NSN 6625-00-926-6903 — this item is cataloged by the U.S. Government under National Stock Number 6625-00-926-6903. Primary manufacturer part number: 04220.
Features
  • Ammeter — FSC 6625
  • Circuit Current for Which Designed: DC
  • Style Designator: ROUND FLUSH MTG
  • Color: UNABLE TO DECODE
  • Meter Depth Behind Mounting Flange: 1.390 INCHES NOMINAL IN
  • FSC Application Data: TEST SET,ELECT. EQUIP.
  • Meter Body Diameter Behind Mounting Flange: 2.170 INCHES NOMINAL IN
  • Dial Scale Marking Color: BLACK SINGLE INDICATOR SINGLE RANGE
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Ammeter, cataloged under National Stock Number 6625-00-926-6903, 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 29 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references 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
NSN6625-00-926-6903
Primary Part Number04220
Item NameAmmeter
FSC / FSG6625 / 66 — No Item Name Available
ManufacturerSimpson Electric Company, Inc.
StatusACTIVE
Circuit Current for Which DesignedDC
Style DesignatorROUND FLUSH MTG
ColorUNABLE TO DECODE
Meter Depth Behind Mounting Flange1.390 INCHES NOMINAL IN
FSC Application DataTEST SET,ELECT. EQUIP.
Meter Body Diameter Behind Mounting Flange2.170 INCHES NOMINAL IN
Dial Scale Marking ColorBLACK SINGLE INDICATOR SINGLE RANGE
Accuracy in Percent-2.0 TO 2.0 AT FULL SCALE SINGLE INDICATOR SINGLE RANGE
Measurement Range+0.0 TO 100.0 MICROAMPERES, DC SINGLE INDICATOR SINGLE RANGE
Mounting Bolt Circle Diameter2.440 INCHES NOMINAL IN
Mounting Arrangement StyleTHREE HOLE/STUD BOLT CIRCLE
Mounting Facility Type and Quantity3 FLANGE
Scale Division Quantity50 SINGLE INDICATOR SINGLE RANGE
Circuit Attachment Method and Quantity2 THREADED STUD
Overall Diameter2.690 INCHES NOMINAL IN
Installation DesignPANEL
Reliability IndicatorNOT ESTABLISHED
Circuit Current for Which DesignedDC
Style DesignatorROUND FLUSH MTG
ColorUNABLE TO DECODE
Meter Depth Behind Mounting Flange1.390 INCHES NOMINAL IN
FSC Application DataTEST SET,ELECT. EQUIP.
Meter Body Diameter Behind Mounting Flange2.170 INCHES NOMINAL IN
Dial Scale Marking ColorBLACK SINGLE INDICATOR SINGLE RANGE
Accuracy in Percent-2.0 TO 2.0 AT FULL SCALE SINGLE INDICATOR SINGLE RANGE
Measurement Range+0.0 TO 100.0 MICROAMPERES, DC SINGLE INDICATOR SINGLE RANGE
Mounting Bolt Circle Diameter2.440 INCHES NOMINAL IN
Mounting Arrangement StyleTHREE HOLE/STUD BOLT CIRCLE
Mounting Facility Type and Quantity3 FLANGE
Lifecycle & Compliance
Acquisition StatusACTIVE
Successor6625-01-011-8836
HAZMATNo
Shelf Life Code0
Criticality CodeQ
Unit of IssueEA
SMR CodeXN
Verified Substitutes 6
Calibrator,audio Level
6625-01-352-13574220 SUCCESSOR
Meter,microwatt
Boonton Electronics Corporation Div Boonton Electronics
Extractor,electrical Card
5133-00-838-5253 INTERCHANGEABLE
Drill,twist
5910-01-009-4470 INTERCHANGEABLE
Capacitor,fixed,ceramic Dielectr
9150-01-703-094104220 INTERCHANGEABLE
Lubricating Oil,food Processing
Crc Industries, Inc.
Cross-Reference Index
Part NumberManufacturer
4220 Simpson Electric Company, Inc. (USA)
04220 PRIMARY Simpson Electric Company, Inc. (USA)
Related Parts
SUCCESSOR 6625-01-011-8836 Calibrator,audio Level
6625-01-352-1357SUCCESSOR
METER,MICROWATT
4220
5998-01-533-3644SUCCESSOR
EXTRACTOR,ELECTRICAL CARD
5133-00-838-5253INTERCHANGEABLE
DRILL,TWIST
5910-01-009-4470INTERCHANGEABLE
CAPACITOR,FIXED,CERAMIC DIELECTR
9150-01-703-0941INTERCHANGEABLE
LUBRICATING OIL,FOOD PROCESSING
04220

Frequently Asked Questions

What is NSN 6625-00-926-6903?

NSN 6625-00-926-6903 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 6625-00-926-6903?

NSN 6625-00-926-6903 has 2 cross-referenced part numbers: 4220 (Simpson Electric Company, Inc.), 04220 (Simpson Electric Company, Inc.).

What NSN replaces 6625-00-926-6903?

There are 6 known substitutes for 6625-00-926-6903: 6625-01-011-8836, 6625-01-352-1357, 5998-01-533-3644 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 04220?

Key specifications for 04220: Circuit Current for Which Designed: DC; Style Designator: ROUND FLUSH MTG; Color: UNABLE TO DECODE; Meter Depth Behind Mounting Flange: 1.390 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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