PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

321Ammeter

Triplett (bluffton) Corporation Dba Lfe Instruments · NSN 6625-00-553-0177 · FSC 6625 · No Item Name Available
Verified by PartsTable
NSN 6625-00-553-0177 — this item is cataloged by the U.S. Government under National Stock Number 6625-00-553-0177. Primary manufacturer part number: 321.
Features
  • Ammeter — FSC 6625
  • Installation Design: PANEL
  • Meter Depth Behind Mounting Flange: 0.938 INCHES NOMINAL IN
  • Overall Diameter: 3.500 INCHES NOMINAL IN
  • Scale Division Quantity: 60 SINGLE INDICATOR SINGLE RANGE
  • Material: PLASTIC
  • Accuracy in Percent: -2.0 TO 2.0 AT FULL SCALE SINGLE INDICATOR SINGLE RANGE
  • Style Designator: ROUND FLUSH MTG
Applications
  • Applications requiring Plastic construction
General Description

The Ammeter, cataloged under National Stock Number 6625-00-553-0177, is classified within Federal Supply Class 6625 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Triplett (bluffton) Corporation Dba Lfe Instruments. Government technical data includes 28 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN6625-00-553-0177
Primary Part Number321
Item NameAmmeter
FSC / FSG6625 / 66 — No Item Name Available
ManufacturerTriplett (bluffton) Corporation Dba Lfe Instruments
StatusACTIVE
Installation DesignPANEL
Meter Depth Behind Mounting Flange0.938 INCHES NOMINAL IN
Overall Diameter3.500 INCHES NOMINAL IN
Scale Division Quantity60 SINGLE INDICATOR SINGLE RANGE
MaterialPLASTIC
Accuracy in Percent-2.0 TO 2.0 AT FULL SCALE SINGLE INDICATOR SINGLE RANGE
Style DesignatorROUND FLUSH MTG
ColorUNABLE TO DECODE
Meter Body Diameter Behind Mounting Flange2.750 INCHES NOMINAL IN
Circuit Current for Which DesignedDC
Mounting Bolt Circle Diameter3.150 INCHES NOMINAL IN
Movement TypeMOVING COIL, PERMANENT MAGNET
Mounting Facility Type and Quantity3 FLANGE
Mounting Arrangement StyleTHREE HOLE/STUD BOLT CIRCLE
Dial Scale Marking ColorBLACK SINGLE INDICATOR SINGLE RANGE
Sensitivity Rating100.0 MILLIVOLTS
Circuit Attachment Method and Quantity2 BINDING POST
Measurement Range+0.0 TO 300.0 MILLIAMPERES, DC SINGLE INDICATOR SINGLE RANGE
Installation DesignPANEL
Meter Depth Behind Mounting Flange0.938 INCHES NOMINAL IN
Overall Diameter3.500 INCHES NOMINAL IN
Scale Division Quantity60 SINGLE INDICATOR SINGLE RANGE
MaterialPLASTIC
Accuracy in Percent-2.0 TO 2.0 AT FULL SCALE SINGLE INDICATOR SINGLE RANGE
Style DesignatorROUND FLUSH MTG
ColorUNABLE TO DECODE
Meter Body Diameter Behind Mounting Flange2.750 INCHES NOMINAL IN
Circuit Current for Which DesignedDC
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Criticality CodeN
Unit of IssueEA
SMR CodeLN
Verified Substitutes 7
Electronic Components Assembly
5999-00-164-0718176MAW1 SUCCESSOR
Contact,electrical
Linde Material Handling North America Corporation
Circuit Card Assembly
6625-00-542-0528413605-1 SUCCESSOR
Voltmeter
L3harris Technologies, Inc. Dba Harris Corporation
6625-00-643-0584476-0031-000 SUCCESSOR
Voltmeter
Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems
6625-01-150-6059321 SUCCESSOR
Multimeter
North Atlantic Industries, Inc. Dba North Atlantic Industries
6625-00-504-2193 INTERCHANGEABLE
Meter,arbitrary Scale
Cross-Reference Index
Part NumberManufacturer
321 Triplett (bluffton) Corporation Dba Lfe Instruments (USA)
Related Parts
5998-00-018-9284SUCCESSOR
ELECTRONIC COMPONENTS ASSEMBLY
5999-00-164-0718SUCCESSOR
CONTACT,ELECTRICAL
176MAW1
5998-00-233-5205SUCCESSOR
CIRCUIT CARD ASSEMBLY
6625-00-542-0528SUCCESSOR
VOLTMETER
413605-1
6625-00-643-0584SUCCESSOR
VOLTMETER
476-0031-000
6625-01-150-6059SUCCESSOR
MULTIMETER
321
6625-00-504-2193INTERCHANGEABLE
METER,ARBITRARY SCALE

Frequently Asked Questions

What is NSN 6625-00-553-0177?

NSN 6625-00-553-0177 is a Ammeter, manufactured by Triplett (bluffton) Corporation Dba Lfe Instruments, classified under FSC 6625 (No Item Name Available). Status: active.

What are the part numbers for NSN 6625-00-553-0177?

NSN 6625-00-553-0177 has 1 cross-referenced part number: 321 (Triplett (bluffton) Corporation Dba Lfe Instruments).

What NSN replaces 6625-00-553-0177?

There are 7 known substitutes for 6625-00-553-0177: 5998-00-018-9284, 5999-00-164-0718, 5998-00-233-5205 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 321?

Key specifications for 321: Installation Design: PANEL; Meter Depth Behind Mounting Flange: 0.938 INCHES NOMINAL IN; Overall Diameter: 3.500 INCHES NOMINAL IN; Scale Division Quantity: 60 SINGLE INDICATOR SINGLE RANGE. 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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