PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

8166Meter,audio Level

Biro Mfg Co Canton Div · NSN 6625-00-121-1567 · FSC 6625 · No Item Name Available
Verified by PartsTable
NSN 6625-00-121-1567 — this item is cataloged by the U.S. Government under National Stock Number 6625-00-121-1567. Primary manufacturer part number: 8166.
Features
  • Meter,audio Level — FSC 6625
  • Movement Type: MOVING COIL, PERMANENT MAGNET
  • Accuracy in Percent: -2.0 TO 2.0 AT FULL SCALE SINGLE INDICATOR SINGLE RANGE
  • Mounting Facility Type and Quantity: 4 THREADED STUD(S)
  • Meter Depth Behind Mounting Flange: 0.944 INCHES NOMINAL IN
  • Pointer Color: BLACK SINGLE INDICATOR SINGLE RANGE
  • Dial Scale Marking Color: BLACK SINGLE INDICATOR SINGLE RANGE
  • Power Source: EXTERNAL
Applications
  • Applications requiring Plastic construction
General Description

The Meter,audio Level, cataloged under National Stock Number 6625-00-121-1567, is classified within Federal Supply Class 6625 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Biro Mfg Co Canton Div. Government technical data includes 27 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN6625-00-121-1567
Primary Part Number8166
Item NameMeter,audio Level
FSC / FSG6625 / 66 — No Item Name Available
ManufacturerBiro Mfg Co Canton Div
StatusACTIVE
Movement TypeMOVING COIL, PERMANENT MAGNET
Accuracy in Percent-2.0 TO 2.0 AT FULL SCALE SINGLE INDICATOR SINGLE RANGE
Mounting Facility Type and Quantity4 THREADED STUD(S)
Meter Depth Behind Mounting Flange0.944 INCHES NOMINAL IN
Pointer ColorBLACK SINGLE INDICATOR SINGLE RANGE
Dial Scale Marking ColorBLACK SINGLE INDICATOR SINGLE RANGE
Power SourceEXTERNAL
Features ProvidedZERO ADJUSTER
Circuit Attachment Method and Quantity2 THREADED STUD
Measurement Range-20.0 TO 0.0 DECIBELS SINGLE INDICATOR SINGLE RANGE
Installation DesignPANEL
Sensitivity Rating1.0 MILLIWATTS
Mounting Arrangement StyleFOUR HOLE/STUD RECTANGULAR/SQUARE
Center to Center Distance Between Mounting Facilities Parallel to Length3.537 INCHES NOMINAL IN
Nuclear Hardness Critical FeatureNONHARDENED
Style DesignatorRECTANGULAR FLUSH MTG
Center to Center Distance Between Mounting Facilities Parallel to Width3.978 INCHES NOMINAL IN
Indicator TypeDIAL W/POINTER
Scale Graduation TypeNONLINEAR SINGLE INDICATOR SINGLE RANGE
Movement Suspension MethodJEWEL PIVOT BASE
FSC Application DataTEST SET,ELECT. EQUIP.
ColorUNABLE TO DECODE
Mounting Stud Diameter0.138 INCHES NOMINAL IN
Mounting Stud Length0.500 INCHES NOMINAL IN
Special MarkingsL SIDE OF SCALE TO M 10 BLACK BAND; BELOW SCALE: ADD TO RECEIVE LEVEL SETTING
Environmental ProtectionSHOCK RESISTANT AND VIBRATION RESISTANT
MaterialPLASTIC
Lifecycle & Compliance
Acquisition StatusACTIVE
Successor6145-01-307-7802 (8016)
HAZMATNo
Shelf Life Code0
Unit of IssueEA
SMR CodeX
Verified Substitutes 8
6145-01-307-78028016 SUCCESSOR
Cable,special Purpose,electrical
General Wire Products, Inc. Dba General Wire Products Inc
4310-00-354-84818166 INTERCHANGEABLE
Ring Set,piston
Quincy Compressor Division of Coltec Industries Inc Dba Quincy Compressor Div Quincy Compressor
5960-00-958-9147 INTERCHANGEABLE
Electron Tube
5985-01-087-33478166 INTERCHANGEABLE
Dummy Load,electrical
Bird Electronic Corporation Div Bird Electronic Corp
2530-01-120-36548166 INTERCHANGEABLE
Cap,steering Column
Eaton Corporation Div Eaton Fluid Power
5360-01-432-0896 INTERCHANGEABLE
Spring,helical,compression
5905-01-446-17528166 INTERCHANGEABLE
Resistor Assembly
Quarterwave Corp.
5360-01-462-7387741017-A INTERCHANGEABLE
Spring,helical,compression
L3harris Maritime Power & Energy Solutions, Inc. Dba Spd Electrical Systems, Inc.
Cross-Reference Index
Part NumberManufacturer
8166 Biro Mfg Co Canton Div (USA)
8166 Metermaster Inc Metermod Div (USA)
8166 Custom Metering Company Inc (USA)
522-1-1-00003 Western Reserve Electronics Inc (USA)
Related Parts
SUCCESSOR 6145-01-307-7802 Cable,special Purpose,electrical · 8016
4310-00-354-8481INTERCHANGEABLE
RING SET,PISTON
8166
5960-00-958-9147INTERCHANGEABLE
ELECTRON TUBE
5985-01-087-3347INTERCHANGEABLE
DUMMY LOAD,ELECTRICAL
8166
2530-01-120-3654INTERCHANGEABLE
CAP,STEERING COLUMN
8166
5360-01-432-0896INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
5905-01-446-1752INTERCHANGEABLE
RESISTOR ASSEMBLY
8166
5360-01-462-7387INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
741017-A

Frequently Asked Questions

What is NSN 6625-00-121-1567?

NSN 6625-00-121-1567 is a Meter,audio Level, manufactured by Biro Mfg Co Canton Div, classified under FSC 6625 (No Item Name Available). Status: active.

What are the part numbers for NSN 6625-00-121-1567?

NSN 6625-00-121-1567 has 4 cross-referenced part numbers: 8166 (Biro Mfg Co Canton Div), 8166 (Metermaster Inc Metermod Div), 8166 (Custom Metering Company Inc), 522-1-1-00003 (Western Reserve Electronics Inc).

What NSN replaces 6625-00-121-1567?

There are 8 known substitutes for 6625-00-121-1567: 6145-01-307-7802, 4310-00-354-8481, 5960-00-958-9147 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 8166?

Key specifications for 8166: Movement Type: MOVING COIL, PERMANENT MAGNET; Accuracy in Percent: -2.0 TO 2.0 AT FULL SCALE SINGLE INDICATOR SINGLE RANGE; Mounting Facility Type and Quantity: 4 THREADED STUD(S); Meter Depth Behind Mounting Flange: 0.944 INCHES NOMINAL IN. 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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