PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

HM3Test Set,electron Tube

Jewell Instruments Llc · NSN 6625-00-256-0600 · FSC 6625 · No Item Name Available
Verified by PartsTable
NSN 6625-00-256-0600 — this item is cataloged by the U.S. Government under National Stock Number 6625-00-256-0600. Primary manufacturer part number: HM3.
Features
  • Test Set,electron Tube — FSC 6625
  • Overall Diameter: 3.500 INCHES NOMINAL IN
  • Overall Diameter: 3.500 INCHES NOMINAL IN
  • 1 verified cross-reference
  • 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 6625-00-256-0600, 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 2 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. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN6625-00-256-0600
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
Overall Diameter3.500 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Criticality CodeQ
Unit of IssueEA
SMR CodeJF
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
6625-00-649-4962702053-1REVC SUCCESSOR
Meter,replacement
L3harris Technologies, Inc. Dba Harris Corporation
6625-00-187-1788 INTERCHANGEABLE
Ammeter
6625-00-221-2576 INTERCHANGEABLE
Multimeter
6625-00-228-8823 INTERCHANGEABLE
Voltmeter
6625-00-539-8473 INTERCHANGEABLE
Voltmeter
6625-00-539-8814 INTERCHANGEABLE
Ammeter
6625-00-539-9722 INTERCHANGEABLE
Test Set,electron Tube
6625-00-668-50681309 INTERCHANGEABLE
Ammeter
Jewell Instruments Llc
Cross-Reference Index
Part NumberManufacturer
HM3 Jewell Instruments Llc (USA)
Related Parts
6625-00-088-9106SUCCESSOR
METER,MODULATION
92025-01
6625-00-255-5806SUCCESSOR
VOLTMETER
232-71
6625-00-649-4962SUCCESSOR
METER,REPLACEMENT
702053-1REVC
6625-00-187-1788INTERCHANGEABLE
AMMETER
6625-00-221-2576INTERCHANGEABLE
MULTIMETER
6625-00-228-8823INTERCHANGEABLE
VOLTMETER
6625-00-539-8473INTERCHANGEABLE
VOLTMETER
6625-00-539-8814INTERCHANGEABLE
AMMETER
6625-00-539-9722INTERCHANGEABLE
TEST SET,ELECTRON TUBE
6625-00-668-5068INTERCHANGEABLE
AMMETER
1309
6625-00-669-0757INTERCHANGEABLE
WATTMETER
350TYPE270
6625-00-669-5068INTERCHANGEABLE
AMMETER

Frequently Asked Questions

What is NSN 6625-00-256-0600?

NSN 6625-00-256-0600 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 6625-00-256-0600?

NSN 6625-00-256-0600 has 1 cross-referenced part number: HM3 (Jewell Instruments Llc).

What NSN replaces 6625-00-256-0600?

There are 12 known substitutes for 6625-00-256-0600: 6625-00-088-9106, 6625-00-255-5806, 6625-00-649-4962 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of HM3?

Key specifications for HM3: Special Features: 1.4 MA FOR FULL SCALE DEFLECTION,80 OHMRESISTANCE ACROSS TERMINALS; Part Name Assigned by Controlling Agency: METER,ELECTRON TUBE TESTER; Overall Diameter: 3.500 INCHES NOMINAL IN; Special Features: 1.4 MA FOR FULL SCALE DEFLECTION,80 OHMRESISTANCE ACROSS TERMINALS. 6 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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