PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MMI-8320Ammeter

Custom Metering Company Inc · NSN 6625-00-373-0897 · FSC 6625 · No Item Name Available
Verified by PartsTable
NSN 6625-00-373-0897 — this item is cataloged by the U.S. Government under National Stock Number 6625-00-373-0897. Primary manufacturer part number: MMI-8320.
Features
  • Ammeter — FSC 6625
  • Environmental Protection: WATERTIGHT
  • Circuit Construction Type: NONELECTRONIC
  • Pointer Color: BLACK SINGLE INDICATOR SINGLE RANGE
  • Nuclear Hardness Critical Feature: NONHARDENED
  • Power Source: EXTERNAL
  • Dial Scale Marking Color: BLACK SINGLE INDICATOR SINGLE RANGE
  • Overall Diameter: 3.500 INCHES NOMINAL IN
Applications
  • Applications requiring Plastic Phenolic construction
General Description

The Ammeter, cataloged under National Stock Number 6625-00-373-0897, is classified within Federal Supply Class 6625 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Custom Metering Company Inc. Government technical data includes 28 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 5 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
NSN6625-00-373-0897
Primary Part NumberMMI-8320
Item NameAmmeter
FSC / FSG6625 / 66 — No Item Name Available
ManufacturerCustom Metering Company Inc
StatusACTIVE
Environmental ProtectionWATERTIGHT
Circuit Construction TypeNONELECTRONIC
Pointer ColorBLACK SINGLE INDICATOR SINGLE RANGE
Nuclear Hardness Critical FeatureNONHARDENED
Power SourceEXTERNAL
Dial Scale Marking ColorBLACK SINGLE INDICATOR SINGLE RANGE
Overall Diameter3.500 INCHES NOMINAL IN
Movement Suspension MethodJEWEL PIVOT BASE
Meter Body Diameter Behind Mounting Flange2.734 INCHES NOMINAL IN
Panel for Which DesignedNONMAGNETIC
MaterialPLASTIC PHENOLIC
Scale Division Quantity60 SINGLE INDICATOR SINGLE RANGE
Style DesignatorROUND FLUSH MTG
Circuit Attachment Method and Quantity2 THREADED STUD
Mounting Bolt Circle Diameter3.117 INCHES NOMINAL IN
Movement TypeMOVING COIL, PERMANENT MAGNET
FSC Application DataTEST SET,ELECTRONIC EQUIPMENT
Mounting Arrangement StyleTHREE HOLE/STUD BOLT CIRCLE
Measurement Range+0.0 TO 150.0 AMPERES, DC SINGLE INDICATOR SINGLE RANGE
Mounting Hole Diameter0.156 INCHES NOMINAL IN
Accuracy in Percent-2.0 TO 2.0 AT FULL SCALE SINGLE INDICATOR SINGLE RANGE
Scale Graduation TypeLINEAR SINGLE INDICATOR SINGLE RANGE
ColorUNABLE TO DECODE
Features ProvidedZERO ADJUSTER
Mounting Facility Type and Quantity3 SCREW AND 3 UNTHREADED HOLE(S)
Circuit Current for Which DesignedDC
Installation DesignPANEL
Meter Depth Behind Mounting Flange1.344 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Criticality CodeQ
Unit of IssueEA
SMR CodeJN
Verified Substitutes 6
5950-00-235-8730SC-D-1736N INTERCHANGEABLE
Coil,telephone
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
5325-00-804-6855 INTERCHANGEABLE
Ring,retaining
5950-00-937-9532SMD540714 INTERCHANGEABLE
Transformer,power
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
6150-00-953-8612C161-3 INTERCHANGEABLE
Cable Assembly,special Purpose,e
Lockheed Martin Corporation Div Lockheed Martin Aeronautics Company
5340-01-231-7359C161 INTERCHANGEABLE
Retainer,helical Compression Spr
Andrea Systems Llc
5998-01-394-1339C161 INTERCHANGEABLE
Circuit Card Assembly
Custom Power, Ltd.
Cross-Reference Index
Part NumberManufacturer
MMI-8320 Custom Metering Company Inc (USA)
310-0-150ADC Beede Electrical Instrument Co. Inc. (USA)
A-14635-A Pincor Power Corp (USA)
MMI-8320 Metermaster Inc Metermod Div (USA)
C161 Kurz & Root Generator Company, Llc (USA)
Related Parts
5950-00-235-8730INTERCHANGEABLE
COIL,TELEPHONE
SC-D-1736N
5325-00-804-6855INTERCHANGEABLE
RING,RETAINING
5950-00-937-9532INTERCHANGEABLE
TRANSFORMER,POWER
SMD540714
6150-00-953-8612INTERCHANGEABLE
CABLE ASSEMBLY,SPECIAL PURPOSE,E
C161-3
5340-01-231-7359INTERCHANGEABLE
RETAINER,HELICAL COMPRESSION SPR
C161
5998-01-394-1339INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
C161

Frequently Asked Questions

What is NSN 6625-00-373-0897?

NSN 6625-00-373-0897 is a Ammeter, manufactured by Custom Metering Company Inc, classified under FSC 6625 (No Item Name Available). Status: active.

What are the part numbers for NSN 6625-00-373-0897?

NSN 6625-00-373-0897 has 5 cross-referenced part numbers: MMI-8320 (Custom Metering Company Inc), 310-0-150ADC (Beede Electrical Instrument Co. Inc.), A-14635-A (Pincor Power Corp), MMI-8320 (Metermaster Inc Metermod Div), C161 (Kurz & Root Generator Company, Llc).

What NSN replaces 6625-00-373-0897?

There are 6 known substitutes for 6625-00-373-0897: 5950-00-235-8730, 5325-00-804-6855, 5950-00-937-9532 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MMI-8320?

Key specifications for MMI-8320: Environmental Protection: WATERTIGHT; Circuit Construction Type: NONELECTRONIC; Pointer Color: BLACK SINGLE INDICATOR SINGLE RANGE; Nuclear Hardness Critical Feature: NONHARDENED. 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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