PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

503-4Voltmeter

Jewell Instruments Llc · NSN 6625-00-729-6723 · FSC 6625 · No Item Name Available
Verified by PartsTable
NSN 6625-00-729-6723 — this item is cataloged by the U.S. Government under National Stock Number 6625-00-729-6723. Primary manufacturer part number: 503-4.
Features
  • Voltmeter — FSC 6625
  • Movement Suspension Method: JEWEL PIVOT BASE
  • Features Provided: ZERO ADJUSTER
  • FSC Application Data: TEST SET,ELECT. EQUIP.
  • Nuclear Hardness Critical Feature: NONHARDENED
  • Scale Division Quantity: 50 SINGLE INDICATOR SINGLE RANGE
  • Color: UNABLE TO DECODE
  • Mounting Arrangement Style: THREE HOLE/STUD BOLT CIRCLE
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Voltmeter, cataloged under National Stock Number 6625-00-729-6723, is classified within Federal Supply Class 6625 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Jewell Instruments Llc. Government technical data includes 29 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 13 commercial cross-references from 12 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN6625-00-729-6723
Primary Part Number503-4
Item NameVoltmeter
FSC / FSG6625 / 66 — No Item Name Available
ManufacturerJewell Instruments Llc
StatusCANCELLED
Movement Suspension MethodJEWEL PIVOT BASE
Features ProvidedZERO ADJUSTER
FSC Application DataTEST SET,ELECT. EQUIP.
Nuclear Hardness Critical FeatureNONHARDENED
Scale Division Quantity50 SINGLE INDICATOR SINGLE RANGE
ColorUNABLE TO DECODE
Mounting Arrangement StyleTHREE HOLE/STUD BOLT CIRCLE
Style DesignatorROUND FLUSH MTG
Mounting Bolt Circle Diameter1.578 INCHES NOMINAL IN
Overall Diameter3.500 INCHES NOMINAL IN
Installation DesignPANEL
Dial Scale Marking ColorBLACK SINGLE INDICATOR SINGLE RANGE
Indicator TypeDIAL W/POINTER
Meter Body Diameter Behind Mounting Flange2.672 INCHES NOMINAL IN
Frequency Response Range+0.000 TO 400.000 HERTZ
Accuracy in Percent-2.0 TO 2.0 AT FULL SCALE SINGLE INDICATOR SINGLE RANGE
Movement TypeMOVING COIL, PERMANENT MAGNET
Measurement Range+0.0 TO 120.0 VOLTS, AC SINGLE INDICATOR SINGLE RANGE
Power SourceEXTERNAL
Circuit Current for Which DesignedAC
Scale Graduation TypeLINEAR SINGLE INDICATOR SINGLE RANGE
Meter Depth Behind Mounting Flange2.410 INCHES NOMINAL IN
Pointer ColorBLACK SINGLE INDICATOR SINGLE RANGE
Circuit Attachment Method and Quantity2 SOLDER LUG
Movement Suspension MethodJEWEL PIVOT BASE
Features ProvidedZERO ADJUSTER
FSC Application DataTEST SET,ELECT. EQUIP.
Nuclear Hardness Critical FeatureNONHARDENED
Scale Division Quantity50 SINGLE INDICATOR SINGLE RANGE
Lifecycle & Compliance
Acquisition StatusCANCELLED
Successor7045-01-240-4951
HAZMATNo
Shelf Life Code0
Criticality CodeN
Unit of IssueEA
SMR CodeZN
Weight0.8600 lbs
Cube0.0575 cu ft
Verified Substitutes 12
Generator,pulse
6625-01-128-7574321-HR-0 TO 25VAC RECTIFIED SUCCESSOR
Voltmeter
Triplett (bluffton) Corporation Dba Lfe Instruments
Tape,electronic Data Processing
6625-00-073-998225-801860-3 INTERCHANGEABLE
Voltmeter
General Dynamics Mission Systems, Inc.
6625-00-091-9968557955-1 INTERCHANGEABLE
Meter,special Scale
Raytheon Company
6625-00-115-9344 INTERCHANGEABLE
Meter,null
5330-00-212-6855 INTERCHANGEABLE
Gasket
6625-00-231-88062836293 INTERCHANGEABLE
Voltmeter
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
6625-00-357-18021987055 INTERCHANGEABLE
Voltmeter
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5920-00-462-1121C180-5 INTERCHANGEABLE
Discharger,electrostatic,aircraf
Lockheed Martin Corporation Div Lockheed Martin Aeronautics Company
Cross-Reference Index
Part NumberManufacturer
108 Allied Healthcare Products Inc Coastal Dental Div Sub of Allegheny International Inc (USA)
503-4 PRIMARY Jewell Instruments Llc (USA)
16315 Simpson Electric Company, Inc. (USA)
026-3107-3 Simpson Electric Co Simpson Instruments Div (USA)
B63F0008 Mcair Support Services Inc Sub Mcdonnell Douglas Corp (USA)
372-1959-00 Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems (USA)
1132-9192 Rogerson Kratos (USA)
3283-110-120VAC Simpson Electric Company, Inc. (USA)
321HR Custom Metering Company Inc (USA)
10368143 Us Army Aviation and Missile Command (USA)
026-3107-3 Beckman Coulter, Inc. Dba Beckman Coulter Inc Div Us Customer Operations (USA)
68421000701 Elbitamerica, Inc. (USA)
B63F0008 Mcdonnell Douglas Corp Mcdonnell Douglas Electronic Systems Co (USA)
Related Parts
SUCCESSOR 7045-01-240-4951 Tape,electronic Data Processing
6625-00-932-2019SUCCESSOR
GENERATOR,PULSE
6625-01-128-7574SUCCESSOR
VOLTMETER
321-HR-0 TO 25VAC RECTIFIED
6625-00-073-9982INTERCHANGEABLE
VOLTMETER
25-801860-3
6625-00-091-9968INTERCHANGEABLE
METER,SPECIAL SCALE
557955-1
6625-00-115-9344INTERCHANGEABLE
METER,NULL
5330-00-212-6855INTERCHANGEABLE
GASKET
6625-00-231-8806INTERCHANGEABLE
VOLTMETER
2836293
6625-00-357-1802INTERCHANGEABLE
VOLTMETER
1987055
5920-00-462-1121INTERCHANGEABLE
DISCHARGER,ELECTROSTATIC,AIRCRAF
C180-5
6625-00-489-6275INTERCHANGEABLE
VOLTMETER
6625-00-618-2459INTERCHANGEABLE
METER,ELECTRICAL FREQUENCY
MTPA7-W/ZP10032126/INSTALLED

Frequently Asked Questions

What is NSN 6625-00-729-6723?

NSN 6625-00-729-6723 is a Voltmeter, manufactured by Jewell Instruments Llc, classified under FSC 6625 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6625-00-729-6723?

NSN 6625-00-729-6723 has 13 cross-referenced part numbers: 108 (Allied Healthcare Products Inc Coastal Dental Div Sub of Allegheny International Inc), 503-4 (Jewell Instruments Llc), 16315 (Simpson Electric Company, Inc.), 026-3107-3 (Simpson Electric Co Simpson Instruments Div), B63F0008 (Mcair Support Services Inc Sub Mcdonnell Douglas Corp) and 8 more.

What NSN replaces 6625-00-729-6723?

There are 12 known substitutes for 6625-00-729-6723: 6625-00-932-2019, 6625-01-128-7574, 7045-01-240-4951 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 503-4?

Key specifications for 503-4: Movement Suspension Method: JEWEL PIVOT BASE; Features Provided: ZERO ADJUSTER; FSC Application Data: TEST SET,ELECT. EQUIP.; Nuclear Hardness Critical Feature: NONHARDENED. 30 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6625-00-729-6723 still in active supply?

NSN 6625-00-729-6723 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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