PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

7688-1Voltmeter

Kurz & Root Generator Company, Llc · NSN 6625-00-604-2637 · FSC 6625 · No Item Name Available
Verified by PartsTable
NSN 6625-00-604-2637 — this item is cataloged by the U.S. Government under National Stock Number 6625-00-604-2637. Primary manufacturer part number: 7688-1.
Features
  • Voltmeter — FSC 6625
  • Dial Scale Marking Color: BLACK SINGLE INDICATOR SINGLE RANGE
  • Furnished Items and Quantity: MULTIPLIER,EXTERNAL 1
  • Pointer Color: BLACK SINGLE INDICATOR SINGLE RANGE
  • Accuracy in Percent: -2.0 TO 2.0 AT FULL SCALE SINGLE INDICATOR SINGLE RANGE
  • Meter Depth Behind Mounting Flange: 1.515 INCHES NOMINAL IN
  • Meter Body Diameter Behind Mounting Flange: 2.750 INCHES NOMINAL IN
  • FSC Application Data: TEST SET,ELECTRONIC EQUIPMENT
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Voltmeter, cataloged under National Stock Number 6625-00-604-2637, is classified within Federal Supply Class 6625 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Kurz & Root Generator Company, Llc. Government technical data includes 29 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 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.

Technical Specifications
ParameterValue
NSN6625-00-604-2637
Primary Part Number7688-1
Item NameVoltmeter
FSC / FSG6625 / 66 — No Item Name Available
ManufacturerKurz & Root Generator Company, Llc
StatusACTIVE
Dial Scale Marking ColorBLACK SINGLE INDICATOR SINGLE RANGE
Furnished Items and QuantityMULTIPLIER,EXTERNAL 1
Pointer ColorBLACK SINGLE INDICATOR SINGLE RANGE
Accuracy in Percent-2.0 TO 2.0 AT FULL SCALE SINGLE INDICATOR SINGLE RANGE
Meter Depth Behind Mounting Flange1.515 INCHES NOMINAL IN
Meter Body Diameter Behind Mounting Flange2.750 INCHES NOMINAL IN
FSC Application DataTEST SET,ELECTRONIC EQUIPMENT
Mounting Bolt Circle Diameter3.160 INCHES NOMINAL IN
Features ProvidedZERO ADJUSTER
Style DesignatorROUND FLUSH MTG
Movement TypeMOVING COIL, PERMANENT MAGNET
Installation DesignPANEL
Nuclear Hardness Critical FeatureNONHARDENED
Mounting Arrangement StyleTHREE HOLE/STUD BOLT CIRCLE
Indicator TypeDIAL W/POINTER
Overall Diameter3.500 INCHES NOMINAL IN
Scale Division Quantity50 SINGLE INDICATOR SINGLE RANGE
Circuit Attachment Method and Quantity2 BINDING POST
Measurement Range+0.0 TO 500.0 VOLTS, AC SINGLE INDICATOR SINGLE RANGE
Scale Graduation TypeLINEAR SINGLE INDICATOR SINGLE RANGE
Circuit Current for Which DesignedAC
ColorUNABLE TO DECODE
Dial Scale Marking ColorBLACK SINGLE INDICATOR SINGLE RANGE
Furnished Items and QuantityMULTIPLIER,EXTERNAL 1
Pointer ColorBLACK SINGLE INDICATOR SINGLE RANGE
Accuracy in Percent-2.0 TO 2.0 AT FULL SCALE SINGLE INDICATOR SINGLE RANGE
Meter Depth Behind Mounting Flange1.515 INCHES NOMINAL IN
Meter Body Diameter Behind Mounting Flange2.750 INCHES NOMINAL IN
FSC Application DataTEST SET,ELECTRONIC EQUIPMENT
Lifecycle & Compliance
Acquisition StatusACTIVE
Successor5999-00-938-2237 (61-85)
HAZMATNo
Verified Substitutes 12
5999-00-938-223761-85 SUCCESSOR
Delay Line
Esc Control Electronics Llc Dba Control Electronics Division of Fil-Coil
3110-00-142-4285 INTERCHANGEABLE
Bearing,ball,airframe
3110-00-156-3467102668-22 INTERCHANGEABLE
Bearing,ball,annular
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
4720-00-392-72887036594 INTERCHANGEABLE
Hose Assembly,nonmetallic
U S Army Tank Automotive Command Amsta-Im-Mm
4820-00-874-4812 INTERCHANGEABLE
Stem,valve
5935-01-013-71771160002P2 INTERCHANGEABLE
Connector,receptacle,electrical
Bae Systems Information and Electronic Systems Integration Inc. Dba Bae Systems
6680-01-141-75036185-3 INTERCHANGEABLE
Meter,flow Rate Indicating
Cooper Interconnect, Inc. Dba Cooper Interconnect Div Interconnect
6680-01-145-2475RMB53PF INTERCHANGEABLE
Meter,flow Rate Indicating
Dwyer Instruments Inc
5315-01-305-59886185 INTERCHANGEABLE
Pin,straight,headless
Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution
5307-01-316-298612342133 INTERCHANGEABLE
Stud,locked in
U S Army Tank Automotive Command Amsta-Im-Mm
Cross-Reference Index
Part NumberManufacturer
7688-1 PRIMARY Kurz & Root Generator Company, Llc (USA)
6185 Simpson Electric Company, Inc. (USA)
M55S00560 Simpson Electric Company, Inc. (USA)
Related Parts
SUCCESSOR 5999-00-938-2237 Delay Line · 61-85
3110-00-142-4285INTERCHANGEABLE
BEARING,BALL,AIRFRAME
3110-00-156-3467INTERCHANGEABLE
BEARING,BALL,ANNULAR
102668-22
4720-00-392-7288INTERCHANGEABLE
HOSE ASSEMBLY,NONMETALLIC
7036594
4820-00-874-4812INTERCHANGEABLE
STEM,VALVE
5935-01-013-7177INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
1160002P2
6680-01-141-7503INTERCHANGEABLE
METER,FLOW RATE INDICATING
6185-3
6680-01-145-2475INTERCHANGEABLE
METER,FLOW RATE INDICATING
RMB53PF
5315-01-305-5988INTERCHANGEABLE
PIN,STRAIGHT,HEADLESS
6185
5307-01-316-2986INTERCHANGEABLE
STUD,LOCKED IN
12342133
5310-01-485-8409INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
76881
4520-01-610-6169INTERCHANGEABLE
HEATER,WATER,GAS

Frequently Asked Questions

What is NSN 6625-00-604-2637?

NSN 6625-00-604-2637 is a Voltmeter, manufactured by Kurz & Root Generator Company, Llc, classified under FSC 6625 (No Item Name Available). Status: active.

What are the part numbers for NSN 6625-00-604-2637?

NSN 6625-00-604-2637 has 3 cross-referenced part numbers: 7688-1 (Kurz & Root Generator Company, Llc), 6185 (Simpson Electric Company, Inc.), M55S00560 (Simpson Electric Company, Inc.).

What NSN replaces 6625-00-604-2637?

There are 12 known substitutes for 6625-00-604-2637: 5999-00-938-2237, 3110-00-142-4285, 3110-00-156-3467 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 7688-1?

Key specifications for 7688-1: Dial Scale Marking Color: BLACK SINGLE INDICATOR SINGLE RANGE; Furnished Items and Quantity: MULTIPLIER,EXTERNAL 1; Pointer Color: BLACK SINGLE INDICATOR SINGLE RANGE; Accuracy in Percent: -2.0 TO 2.0 AT FULL SCALE 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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