PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

637-16750Meter,electrical Frequency

Phaostron Instrument and Electronic Company · NSN 6625-00-004-8066 · FSC 6625 · No Item Name Available
Verified by PartsTable
NSN 6625-00-004-8066 — this item is cataloged by the U.S. Government under National Stock Number 6625-00-004-8066. Primary manufacturer part number: 637-16750.
Features
  • Meter,electrical Frequency — FSC 6625
  • Meter Body Diameter Behind Mounting Flange: 2.800 INCHES NOMINAL IN
  • Features Provided: ZERO ADJUSTER
  • Mounting Facility Type and Quantity: 3 UNTHREADED HOLE(S)
  • Measurement Range: +0.0 TO 133.0 VOLTS, AC SINGLE INDICATOR FIRST RANGE
  • Circuit Current for Which Designed: DC
  • Special Markings: PERCENT RATED CURRENT,DOUBLE WIDTH RED LINE AT 0.75 AMPS FOR 60 HZSCALE,DOUBLE WIDTH BLUE LINE AT 0.625 AMPS FOR 50 HZ SCALE
  • Circuit Attachment Method and Quantity: 2 THREADED STUD
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Meter,electrical Frequency, cataloged under National Stock Number 6625-00-004-8066, is classified within Federal Supply Class 6625 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Phaostron Instrument and Electronic Company. Government technical data includes 27 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 8 commercial cross-references from 8 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
NSN6625-00-004-8066
Primary Part Number637-16750
Item NameMeter,electrical Frequency
FSC / FSG6625 / 66 — No Item Name Available
ManufacturerPhaostron Instrument and Electronic Company
StatusACTIVE
Meter Body Diameter Behind Mounting Flange2.800 INCHES NOMINAL IN
Features ProvidedZERO ADJUSTER
Mounting Facility Type and Quantity3 UNTHREADED HOLE(S)
Measurement Range+0.0 TO 133.0 VOLTS, AC SINGLE INDICATOR FIRST RANGE
Circuit Current for Which DesignedDC
Special MarkingsPERCENT RATED CURRENT,DOUBLE WIDTH RED LINE AT 0.75 AMPS FOR 60 HZSCALE,DOUBLE WIDTH BLUE LINE AT 0.625 AMPS FOR 50 HZ SCALE
Circuit Attachment Method and Quantity2 THREADED STUD
ColorUNABLE TO DECODE
Indicator TypeDIAL W/POINTER
Nuclear Hardness Critical FeatureHARDENED
Style DesignatorROUND FLUSH MTG
Overall Diameter3.510 INCHES NOMINAL IN
Measurement Range+0.0 TO 160.0 VOLTS, AC SINGLE INDICATOR SECOND RANGE
Scale Selection MethodTERMINAL
Mounting Stud Length0.375 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN
Installation DesignPANEL
Mounting Bolt Circle Diameter3.160 INCHES NOMINAL IN
Dial Scale Marking ColorBLACK SINGLE INDICATOR SINGLE RANGE
Mounting Hole Diameter0.143 INCHES MINIMUM AND 0.157 INCHES MAXIMUM IN
Meter Depth Behind Mounting Flange1.660 INCHES NOMINAL IN
Mounting Arrangement StyleTHREE HOLE/STUD BOLT CIRCLE
Meter Body Diameter Behind Mounting Flange2.800 INCHES NOMINAL IN
Features ProvidedZERO ADJUSTER
Mounting Facility Type and Quantity3 UNTHREADED HOLE(S)
Measurement Range+0.0 TO 133.0 VOLTS, AC SINGLE INDICATOR FIRST RANGE
Circuit Current for Which DesignedDC
Special MarkingsPERCENT RATED CURRENT,DOUBLE WIDTH RED LINE AT 0.75 AMPS FOR 60 HZSCALE,DOUBLE WIDTH BLUE LINE AT 0.625 AMPS FOR 50 HZ SCALE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Criticality CodeQ
Unit of IssueEA
SMR CodeDZ
Weight0.7350 lbs
Cube0.0417 cu ft
Verified Substitutes 12
5920-00-221-56737545850 INTERCHANGEABLE
Fuseholder,block
Army, United States Department of the Dba Rock Island Arsenal Jmtc
1650-00-276-950530010 INTERCHANGEABLE
Valve Assy
Eaton Aerospace Llc Dba Eaton Aerospace Jackson
5120-00-277-1207 INTERCHANGEABLE
Ratchet Attachment,socket Wrench
4330-00-531-434330010 INTERCHANGEABLE
Filter Element,fluid
Pti Technologies Inc.
6650-00-559-1462AX30010 INTERCHANGEABLE
Magnifier
Edmund Optics, Inc
5330-00-768-7216 INTERCHANGEABLE
Gasket
5805-00-782-9210A3000817 INTERCHANGEABLE
Ff Hook Light Asse
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
5360-00-886-483230010 INTERCHANGEABLE
Spring,helical,compression
Eaton Aerospace Llc
5360-00-999-83155018-871 INTERCHANGEABLE
Spring,helical,extension
Raytheon Company Div Rmd Strategic
5310-01-122-20126-959-7 INTERCHANGEABLE
Washer
Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division
Cross-Reference Index
Part NumberManufacturer
267842 Solartron Electronics Inc Weston Instruments Div (USA)
300-10 Jewell Instruments, Llc Dba Modutec Use CAGE Code 33005 for Cataloging (USA)
637-16750 PRIMARY Phaostron Instrument and Electronic Company (USA)
69-597 Department of Defense Project Manager-Mobile Electric Power (USA)
04306-3004 Harsco Corp Bmy-Combat Systems Div (USA)
35.7002 Ideal Precision Meter Co Dba Ideal Precision Meter Co (USA)
300-10 PRIMARY Jewell Instruments Llc (USA)
66250048066 E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales
Related Parts
5920-00-221-5673INTERCHANGEABLE
FUSEHOLDER,BLOCK
7545850
1650-00-276-9505INTERCHANGEABLE
VALVE ASSY
30010
5120-00-277-1207INTERCHANGEABLE
RATCHET ATTACHMENT,SOCKET WRENCH
4330-00-531-4343INTERCHANGEABLE
FILTER ELEMENT,FLUID
30010
6650-00-559-1462INTERCHANGEABLE
MAGNIFIER
AX30010
5330-00-768-7216INTERCHANGEABLE
GASKET
5805-00-782-9210INTERCHANGEABLE
FF HOOK LIGHT ASSE
A3000817
5360-00-886-4832INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
30010
5360-00-999-8315INTERCHANGEABLE
SPRING,HELICAL,EXTENSION
5018-871
5310-01-122-2012INTERCHANGEABLE
WASHER
6-959-7
3020-01-181-2033INTERCHANGEABLE
GEAR CLUSTER
30010-1416
4720-01-214-1268INTERCHANGEABLE
HOSE,AIR DUCT
FLX200111002404

Frequently Asked Questions

What is NSN 6625-00-004-8066?

NSN 6625-00-004-8066 is a Meter,electrical Frequency, manufactured by Phaostron Instrument and Electronic Company, classified under FSC 6625 (No Item Name Available). Status: active.

What are the part numbers for NSN 6625-00-004-8066?

NSN 6625-00-004-8066 has 8 cross-referenced part numbers: 267842 (Solartron Electronics Inc Weston Instruments Div), 300-10 (Jewell Instruments, Llc Dba Modutec Use CAGE Code 33005 for Cataloging), 637-16750 (Phaostron Instrument and Electronic Company), 69-597 (Department of Defense Project Manager-Mobile Electric Power), 04306-3004 (Harsco Corp Bmy-Combat Systems Div) and 3 more.

What NSN replaces 6625-00-004-8066?

There are 12 known substitutes for 6625-00-004-8066: 5920-00-221-5673, 1650-00-276-9505, 5120-00-277-1207 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 637-16750?

Key specifications for 637-16750: Meter Body Diameter Behind Mounting Flange: 2.800 INCHES NOMINAL IN; Special Features: TERMINAL NO. 1/4-28 IN. THD 0.620 IN. LG IN; Features Provided: ZERO ADJUSTER; Mounting Facility Type and Quantity: 3 UNTHREADED HOLE(S). 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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