PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

HM3Test Set,electron Tube

Jewell Instruments Llc · NSN 6625-00-539-9722 · FSC 6625 · No Item Name Available
Verified by PartsTable
NSN 6625-00-539-9722 — this item is cataloged by the U.S. Government under National Stock Number 6625-00-539-9722. Primary manufacturer part number: HM3.
Features
  • Test Set,electron Tube — FSC 6625
  • Overall Diameter: 3.500 INCHES NOMINAL IN
  • Installation Design: PANEL
  • Overall Diameter: 3.500 INCHES NOMINAL IN
  • Installation Design: PANEL
  • 2 verified cross-references
  • Primary manufacturer: Jewell Instruments Llc
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
General Description

The Test Set,electron Tube, cataloged under National Stock Number 6625-00-539-9722, is classified within Federal Supply Class 6625 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Jewell Instruments Llc. Government technical data includes 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references 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
NSN6625-00-539-9722
Primary Part NumberHM3
Item NameTest Set,electron Tube
FSC / FSG6625 / 66 — No Item Name Available
ManufacturerJewell Instruments Llc
StatusACTIVE
Overall Diameter3.500 INCHES NOMINAL IN
Installation DesignPANEL
Overall Diameter3.500 INCHES NOMINAL IN
Installation DesignPANEL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
6625-00-088-910692025-01 SUCCESSOR
Meter,modulation
Agilent Technologies, Inc. Div Agilent Technologies Headquarters
6625-00-255-5806232-71 SUCCESSOR
Voltmeter
Jewell Instruments Llc
6625-00-325-09771183016P1 SUCCESSOR
Meter,special Scale
Bae Systems Information and Electronic Systems Integration Inc. Dba Bae Systems
6625-00-649-4962702053-1REVC SUCCESSOR
Meter,replacement
L3harris Technologies, Inc. Dba Harris Corporation
Ammeter
6625-00-056-4544 INTERCHANGEABLE
Meter,replacement
6625-00-068-270520131011-105 INTERCHANGEABLE
Ammeter
Jewell Instruments Llc
6625-00-068-3517 INTERCHANGEABLE
Voltmeter
6625-00-182-7607S20031 INTERCHANGEABLE
Meter,arbitrary Scale
Simpson Electric Company, Inc.
6625-00-187-1788 INTERCHANGEABLE
Ammeter
Cross-Reference Index
Part NumberManufacturer
HM3 Jewell Instruments Llc (USA)
HS3Z Jewell Instruments Llc (USA)
Related Parts
6625-00-088-9106SUCCESSOR
METER,MODULATION
92025-01
6625-00-255-5806SUCCESSOR
VOLTMETER
232-71
6625-00-325-0977SUCCESSOR
METER,SPECIAL SCALE
1183016P1
6625-00-649-4962SUCCESSOR
METER,REPLACEMENT
702053-1REVC
6625-01-206-9966SUCCESSOR
AMMETER
6625-00-056-4544INTERCHANGEABLE
METER,REPLACEMENT
6625-00-068-2705INTERCHANGEABLE
AMMETER
20131011-105
6625-00-068-3517INTERCHANGEABLE
VOLTMETER
6625-00-182-7607INTERCHANGEABLE
METER,ARBITRARY SCALE
S20031
6625-00-187-1788INTERCHANGEABLE
AMMETER
6625-00-221-2576INTERCHANGEABLE
MULTIMETER
6625-00-228-8823INTERCHANGEABLE
VOLTMETER

Frequently Asked Questions

What is NSN 6625-00-539-9722?

NSN 6625-00-539-9722 is a Test Set,electron Tube, manufactured by Jewell Instruments Llc, classified under FSC 6625 (No Item Name Available). Status: active.

What are the part numbers for NSN 6625-00-539-9722?

NSN 6625-00-539-9722 has 2 cross-referenced part numbers: HM3 (Jewell Instruments Llc), HS3Z (Jewell Instruments Llc).

What NSN replaces 6625-00-539-9722?

There are 12 known substitutes for 6625-00-539-9722: 6625-00-088-9106, 6625-00-255-5806, 6625-00-325-0977 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of HM3?

Key specifications for HM3: Part Name Assigned by Controlling Agency: METER,ELECTRON TUBE TESTER; Special Features: WHITE BACKGROUND ON MICROHMS,SCALE AND DOUBTFUL SECTOR RED BACKGROUND ON REPLACE SECTOR GREEN BACKGROUND ON GOOD SECTOR; Overall Diameter: 3.500 INCHES NOMINAL IN; Installation Design: PANEL. 10 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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