PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1521-10356Voltmeter

Simpson Electric Company, Inc. · NSN 6625-01-321-7473 · FSC 6625 · No Item Name Available
Verified by PartsTable
NSN 6625-01-321-7473 — this item is cataloged by the U.S. Government under National Stock Number 6625-01-321-7473. Primary manufacturer part number: 1521-10356.
Features
  • Voltmeter — FSC 6625
  • Barrel Width: 0.935 INCHES NOMINAL IN
  • Installation Design: PANEL
  • Furnished Items and Quantity: NUT 2
  • Accuracy in Percent: -2.0 TO 2.0 AT FULL SCALE SINGLE INDICATOR SINGLE RANGE
  • Dial Scale Marking Color: BLACK SINGLE INDICATOR SINGLE RANGE
  • Meter Depth Behind Mounting Flange: 1.475 INCHES NOMINAL IN
  • Indicator Type: DIAL W/POINTER
Applications
  • Applications requiring Plastic Acrylic construction
General Description

The Voltmeter, cataloged under National Stock Number 6625-01-321-7473, 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 28 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 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
NSN6625-01-321-7473
Primary Part Number1521-10356
Item NameVoltmeter
FSC / FSG6625 / 66 — No Item Name Available
ManufacturerSimpson Electric Company, Inc.
StatusACTIVE
Barrel Width0.935 INCHES NOMINAL IN
Installation DesignPANEL
Furnished Items and QuantityNUT 2
Accuracy in Percent-2.0 TO 2.0 AT FULL SCALE SINGLE INDICATOR SINGLE RANGE
Dial Scale Marking ColorBLACK SINGLE INDICATOR SINGLE RANGE
Meter Depth Behind Mounting Flange1.475 INCHES NOMINAL IN
Indicator TypeDIAL W/POINTER
Scale Division Quantity50 SINGLE INDICATOR SINGLE RANGE
Meter Body Width Behind Mounting Flange1.750 INCHES NOMINAL IN
Distance Between Mounting Facility Centers1.995 INCHES MINIMUM AND 2.005 INCHES MAXIMUM IN
Mounting Arrangement StyleTWO HOLE/STUD
FSC Application DataTEST SET,ELECT. EQUIP.
Scale Selection MethodTERMINAL
Circuit Attachment Method and Quantity2 SOLDER STUD
Meter Barrel Depth0.935 INCHES NOMINAL IN
Pointer ColorRED SINGLE INDICATOR SINGLE RANGE
Measurement Range+0.0 TO 25.0 VOLTS, DC SINGLE INDICATOR SINGLE RANGE
Scale Graduation TypeLINEAR SINGLE INDICATOR SINGLE RANGE
Style DesignatorRECTANGULAR FLUSH MTG BARREL, DOWN
Power SourceEXTERNAL
Mounting Facility Type and Quantity1 THREADED BEZEL AND 2 SCREW AND 2 UNTHREADED HOLE(S)
Supplementary Features1000 OHMS PER V RES
Nuclear Hardness Critical FeatureNONHARDENED
Meter Body Height Behind Mounting Flange1.235 INCHES NOMINAL IN
ColorUNABLE TO DECODE
MaterialPLASTIC ACRYLIC
Circuit Current for Which DesignedDC
Mounting Hole Diameter0.136 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Unit of IssueEA
SMR CodeJ
Verified Substitutes 12
Mounting Pad,electrical-Electron
5965-00-023-0932 INTERCHANGEABLE
Microphone,dynamic
5935-00-201-8153 INTERCHANGEABLE
Adapter,connector
5815-00-228-6710SC-C-69992-17 INTERCHANGEABLE
Bar,connecting,teletypewriter
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
4820-00-415-13871035-6 INTERCHANGEABLE
Retainer,seat,valve
Tescom Corp Dba Tescom Div Tescom
5940-01-014-3378 INTERCHANGEABLE
Terminal,stud
5930-01-195-850510356 INTERCHANGEABLE
Switch Box
Shallco, Inc
5985-01-254-59075496409 INTERCHANGEABLE
Coupler,directional
Naval Sea Systems Command
4820-01-307-622210560208 INTERCHANGEABLE
Disk,valve
General Dynamics Land Systems Canadacorp
5330-01-360-90893243358S01 INTERCHANGEABLE
Felt,mechanical,preformed
Prestolite Electric Inc
Cross-Reference Index
Part NumberManufacturer
1521-10356 Simpson Electric Company, Inc. (USA)
10356 Simpson Electric Co Simpson Instruments Div (USA)
Related Parts
5999-00-404-9251SUCCESSOR
MOUNTING PAD,ELECTRICAL-ELECTRON
5965-00-023-0932INTERCHANGEABLE
MICROPHONE,DYNAMIC
5935-00-201-8153INTERCHANGEABLE
ADAPTER,CONNECTOR
5815-00-228-6710INTERCHANGEABLE
BAR,CONNECTING,TELETYPEWRITER
SC-C-69992-17
4820-00-415-1387INTERCHANGEABLE
RETAINER,SEAT,VALVE
1035-6
5940-01-014-3378INTERCHANGEABLE
TERMINAL,STUD
5930-01-195-8505INTERCHANGEABLE
SWITCH BOX
10356
5985-01-254-5907INTERCHANGEABLE
COUPLER,DIRECTIONAL
5496409
4820-01-307-6222INTERCHANGEABLE
DISK,VALVE
10560208
5330-01-360-9089INTERCHANGEABLE
FELT,MECHANICAL,PREFORMED
3243358S01
6515-01-389-8066INTERCHANGEABLE
LANCET SET,FINGER BLEEDING
10-356
5945-01-588-4821INTERCHANGEABLE
RELAY,SOLID STATE
10356

Frequently Asked Questions

What is NSN 6625-01-321-7473?

NSN 6625-01-321-7473 is a Voltmeter, manufactured by Simpson Electric Company, Inc., classified under FSC 6625 (No Item Name Available). Status: active.

What are the part numbers for NSN 6625-01-321-7473?

NSN 6625-01-321-7473 has 2 cross-referenced part numbers: 1521-10356 (Simpson Electric Company, Inc.), 10356 (Simpson Electric Co Simpson Instruments Div).

What NSN replaces 6625-01-321-7473?

There are 12 known substitutes for 6625-01-321-7473: 5999-00-404-9251, 5965-00-023-0932, 5935-00-201-8153 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1521-10356?

Key specifications for 1521-10356: Overall Height: 0.730 INCHES NOMINAL IN; Barrel Width: 0.935 INCHES NOMINAL IN; Installation Design: PANEL; Furnished Items and Quantity: NUT 2. 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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