PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

T4Test Set,insulation Breakdown

Entron Industries Limited Partnership Dba Entron Industries Property Div · NSN 6625-00-391-7957 · FSC 6625 · No Item Name Available
Verified by PartsTable
NSN 6625-00-391-7957 — this item is cataloged by the U.S. Government under National Stock Number 6625-00-391-7957. Primary manufacturer part number: T4.
Features
  • Test Set,insulation Breakdown — FSC 6625
  • AC Voltage Rating: 115.0 VOLTS NOMINAL
  • Scale Range: +0.0 TO 100.0 MICROAMPS AND +0.0 TO 15.0 KILOVOLTS
  • DC Voltage Rating: 28.0 VOLTS NOMINAL
  • Test Lead Quantity: 1
  • Installation Design: PORTABLE
  • Meter Type: AMMETER AND VOLTMETER
  • Frequency Rating: 60.000 HERTZ NOMINAL
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Test Set,insulation Breakdown, cataloged under National Stock Number 6625-00-391-7957, is classified within Federal Supply Class 6625 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Entron Industries Limited Partnership Dba Entron Industries Property Div. Government technical data includes 25 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, 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
NSN6625-00-391-7957
Primary Part NumberT4
Item NameTest Set,insulation Breakdown
FSC / FSG6625 / 66 — No Item Name Available
ManufacturerEntron Industries Limited Partnership Dba Entron Industries Property Div
StatusACTIVE
AC Voltage Rating115.0 VOLTS NOMINAL
Scale Range+0.0 TO 100.0 MICROAMPS AND +0.0 TO 15.0 KILOVOLTS
DC Voltage Rating28.0 VOLTS NOMINAL
Test Lead Quantity1
Installation DesignPORTABLE
Meter TypeAMMETER AND VOLTMETER
Frequency Rating60.000 HERTZ NOMINAL
Wire Lead Length180.000 INCHES NOMINAL IN
Circuit Overload Protection DeviceFUSE
Leakage Indicator TypeLAMP
Output Voltage Rating2.000 KILOVOLTS MINIMUM AND 15.000 KILOVOLTS MAXIMUM
Wire Termination TypePROD
Meter Quantity2
PhaseSINGLE
Output Current TypeDC
AC Voltage Rating115.0 VOLTS NOMINAL
Scale Range+0.0 TO 100.0 MICROAMPS AND +0.0 TO 15.0 KILOVOLTS
DC Voltage Rating28.0 VOLTS NOMINAL
Test Lead Quantity1
Installation DesignPORTABLE
Meter TypeAMMETER AND VOLTMETER
Frequency Rating60.000 HERTZ NOMINAL
Wire Lead Length180.000 INCHES NOMINAL IN
Circuit Overload Protection DeviceFUSE
Leakage Indicator TypeLAMP
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
6625-00-257-21786039 SUCCESSOR
Test Set,battery
Associated Equipment Corporation Dba Associated Equipment Corp
6625-01-015-3753T446-10003-1004 SUCCESSOR
Lead Set,test
Analogic Corp Data Precision Div
5920-00-142-6862T4 INTERCHANGEABLE
Fuse,plug
Cooper Bussmann, Llc Dba Cooper Industries
6505-00-147-0000 INTERCHANGEABLE
Talc
5340-00-229-38461141GE INTERCHANGEABLE
Key Blank
Ilco Unican Corp Dba Wolf Sales
5985-00-295-3919 INTERCHANGEABLE
Attenuator,variable
6680-00-515-6363T4 INTERCHANGEABLE
Tachometer,vibrating Reed
Avo Intl
5950-00-519-9287T4 INTERCHANGEABLE
Transformer,audio Frequency
Bogen Communications Inc
6240-00-536-1867T4 INTERCHANGEABLE
Lamp,incandescent
Sol-Rex Miniature Lamp Works
4910-00-554-3542158H INTERCHANGEABLE
Lift,transmission and Differenti
Goodrich Corporation
Cross-Reference Index
Part NumberManufacturer
T4 PRIMARY Entron Industries Limited Partnership Dba Entron Industries Property Div (USA)
Related Parts
6625-00-257-2178SUCCESSOR
TEST SET,BATTERY
6039
6625-01-015-3753SUCCESSOR
LEAD SET,TEST
T446-10003-1004
5920-00-142-6862INTERCHANGEABLE
FUSE,PLUG
T4
6505-00-147-0000INTERCHANGEABLE
TALC
5340-00-229-3846INTERCHANGEABLE
KEY BLANK
1141GE
5985-00-295-3919INTERCHANGEABLE
ATTENUATOR,VARIABLE
6680-00-515-6363INTERCHANGEABLE
TACHOMETER,VIBRATING REED
T4
5950-00-519-9287INTERCHANGEABLE
TRANSFORMER,AUDIO FREQUENCY
T4
6240-00-536-1867INTERCHANGEABLE
LAMP,INCANDESCENT
T4
4910-00-554-3542INTERCHANGEABLE
LIFT,TRANSMISSION AND DIFFERENTI
158H
6675-00-641-3549INTERCHANGEABLE
THEODOLITE,SURVEYING
5920-00-871-1045INTERCHANGEABLE
FUSE,PLUG
T4

Frequently Asked Questions

What is NSN 6625-00-391-7957?

NSN 6625-00-391-7957 is a Test Set,insulation Breakdown, manufactured by Entron Industries Limited Partnership Dba Entron Industries Property Div, classified under FSC 6625 (No Item Name Available). Status: active.

What are the part numbers for NSN 6625-00-391-7957?

NSN 6625-00-391-7957 has 1 cross-referenced part number: T4 (Entron Industries Limited Partnership Dba Entron Industries Property Div).

What NSN replaces 6625-00-391-7957?

There are 12 known substitutes for 6625-00-391-7957: 6625-00-257-2178, 6625-01-015-3753, 5920-00-142-6862 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of T4?

Key specifications for T4: Overall Width: 11.500 INCHES NOMINAL IN; AC Voltage Rating: 115.0 VOLTS NOMINAL; Scale Range: +0.0 TO 100.0 MICROAMPS AND +0.0 TO 15.0 KILOVOLTS; DC Voltage Rating: 28.0 VOLTS NOMINAL. 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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