PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4391MWattmeter

Bird Electronic Corporation Div Bird Electronic Corp · NSN 6625-01-227-4370 · FSC 6625 · No Item Name Available
Verified by PartsTable
NSN 6625-01-227-4370 — this item is cataloged by the U.S. Government under National Stock Number 6625-01-227-4370. Primary manufacturer part number: 4391M.
Features
  • Wattmeter — FSC 6625
  • Power Source: INTERNAL
  • Operating Voltage Rating in Volts: 115.0 AC MINIMUM AND 260.0 AC MAXIMUM
  • Functional Description: RF POWER ANALYST
  • Display Color: AMBER SINGLE INDICATOR SINGLE RANGE
  • Style Designator: HAND-HELD
  • Accuracy Rating: PORM 5 PCT OF FULL SCALE CW SINGLE INDICATOR SINGLE RANGE
  • Measurement Range: +0.5 TO 2300.0 MEGAHERTZ SINGLE INDICATOR SINGLE RANGE
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Wattmeter, cataloged under National Stock Number 6625-01-227-4370, is classified within Federal Supply Class 6625 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Bird Electronic Corporation Div Bird Electronic Corp. Government technical data includes 22 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 4 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
NSN6625-01-227-4370
Primary Part Number4391M
Item NameWattmeter
FSC / FSG6625 / 66 — No Item Name Available
ManufacturerBird Electronic Corporation Div Bird Electronic Corp
StatusCANCELLED
Power SourceINTERNAL
Operating Voltage Rating in Volts115.0 AC MINIMUM AND 260.0 AC MAXIMUM
Functional DescriptionRF POWER ANALYST
Display ColorAMBER SINGLE INDICATOR SINGLE RANGE
Style DesignatorHAND-HELD
Accuracy RatingPORM 5 PCT OF FULL SCALE CW SINGLE INDICATOR SINGLE RANGE
Measurement Range+0.5 TO 2300.0 MEGAHERTZ SINGLE INDICATOR SINGLE RANGE
PhaseSINGLE
Circuit Attachment Method and Quantity2 QUICK DISCONNECT, FEMALE
Reference Data and LiteratureT.O.33A1-7-322-1
Circuit Current for Which DesignedAC
Display Digit Quantity3-1/2
Frequency Rating50.0 HERTZ MINIMUM AND 60.0 HERTZ MAXIMUM
Installation DesignBENCH OR HANDHELD
Display TypeLIGHT EMITTING DIODE (L.E.D.).
Indicator TypeDIGITAL DISPLAY
Power SourceINTERNAL
Operating Voltage Rating in Volts115.0 AC MINIMUM AND 260.0 AC MAXIMUM
Functional DescriptionRF POWER ANALYST
Display ColorAMBER SINGLE INDICATOR SINGLE RANGE
Style DesignatorHAND-HELD
Accuracy RatingPORM 5 PCT OF FULL SCALE CW SINGLE INDICATOR SINGLE RANGE
Lifecycle & Compliance
Acquisition StatusCANCELLED
Successor6625-01-478-2653 (4391A)
HAZMATNo
Shelf Life Code0
Criticality CodeG
Unit of IssueEA
SMR CodeVU
Weight15.0000 lbs
Cube0.2778 cu ft
Verified Substitutes 12
No Item Name Available
6625-01-478-26534391A SUCCESSOR
Wattmeter
Bird Electronic Corporation Div Bird Electronic Corp
4720-00-017-079728432 INTERCHANGEABLE
Hose,nonmetallic
Gates Corporation
5940-00-231-442314078057-6 INTERCHANGEABLE
Terminal,lug
Entron Industries Limited Partnership Dba Entron Industries Property Div
5905-00-274-128793J91R INTERCHANGEABLE
Resistor,fixed,wire Wound
Ohmite Holding, L.l.c. Dba Ohmite Manufacturing
6220-00-577-343412338610-1 INTERCHANGEABLE
Light,marker,clearance
U S Army Tank Automotive Command Amsta-Im-Mm
1560-00-786-188927-22586-7 INTERCHANGEABLE
Insulation,duct,aircraft
Tex-Tech Engineered Composites, Llc
2915-00-944-836783550 INTERCHANGEABLE
Cover Assembly,piston,fuel Contr
Triumph Engine Control Systems Llc
5950-01-029-08424015-011 INTERCHANGEABLE
Transformer,power
Ametek Programmable Power, Inc.
5977-01-069-2693 INTERCHANGEABLE
Brush,electrical Contact
Cross-Reference Index
Part NumberManufacturer
4391 Thales Espana Sistemas, S.a.u. (ESP)
401-5011 Nimikkeistokeskus Ncb Finland (FIN)
4391M PRIMARY Bird Electronic Corporation Div Bird Electronic Corp (USA)
83550 Cdi Industries Inc (USA)
4391 Bird Electronic Corporation Div Bird Electronic Corp (USA)
Related Parts
SUCCESSOR 6625-01-478-2653 Wattmeter · 4391A
6625-01-239-6584SUCCESSOR
NO ITEM NAME AVAILABLE
4720-00-017-0797INTERCHANGEABLE
HOSE,NONMETALLIC
28432
5940-00-231-4423INTERCHANGEABLE
TERMINAL,LUG
14078057-6
5905-00-274-1287INTERCHANGEABLE
RESISTOR,FIXED,WIRE WOUND
93J91R
6220-00-577-3434INTERCHANGEABLE
LIGHT,MARKER,CLEARANCE
12338610-1
1560-00-786-1889INTERCHANGEABLE
INSULATION,DUCT,AIRCRAFT
27-22586-7
2915-00-944-8367INTERCHANGEABLE
COVER ASSEMBLY,PISTON,FUEL CONTR
83550
5950-01-029-0842INTERCHANGEABLE
TRANSFORMER,POWER
4015-011
5977-01-069-2693INTERCHANGEABLE
BRUSH,ELECTRICAL CONTACT
5305-01-601-7440INTERCHANGEABLE
SCREW,MACHINE
4391
5331-01-680-8220INTERCHANGEABLE
O-RING
93270BN

Frequently Asked Questions

What is NSN 6625-01-227-4370?

NSN 6625-01-227-4370 is a Wattmeter, manufactured by Bird Electronic Corporation Div Bird Electronic Corp, classified under FSC 6625 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6625-01-227-4370?

NSN 6625-01-227-4370 has 5 cross-referenced part numbers: 4391 (Thales Espana Sistemas, S.a.u.), 401-5011 (Nimikkeistokeskus Ncb Finland), 4391M (Bird Electronic Corporation Div Bird Electronic Corp), 83550 (Cdi Industries Inc), 4391 (Bird Electronic Corporation Div Bird Electronic Corp).

What NSN replaces 6625-01-227-4370?

There are 12 known substitutes for 6625-01-227-4370: 6625-01-239-6584, 6625-01-478-2653, 4720-00-017-0797 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 4391M?

Key specifications for 4391M: End Item Identification: ELECTRONIC TEST EQUIPMENT; Power Source: INTERNAL; Overall Depth: 110.0 MILLIMETERS NOMINAL MM; Operating Voltage Rating in Volts: 115.0 AC MINIMUM AND 260.0 AC MAXIMUM. 30 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6625-01-227-4370 still in active supply?

NSN 6625-01-227-4370 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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