PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

431BTimer,scaler

Advanced Measurement Technology Inc · NSN 6645-00-243-7541 · FSC 6645 · No Item Name Available
Verified by PartsTable
NSN 6645-00-243-7541 — this item is cataloged by the U.S. Government under National Stock Number 6645-00-243-7541. Primary manufacturer part number: 431B.
Features
  • Timer,scaler — FSC 6645
  • General Characteristics Item Description: 99999.9 SECOND TIME CAPACITY,0.1 SECOND TIME INTERVAL,6 VERTICAL COLUMNS NUMBERED 0 TO 9 W/NEON LIGHTS FOR EACH NUMBER,1000 HZ TUNING FORK OSCILLATOR TIME BASE,FRONT PANEL SWITCH FOR TIMER AND SCALER,PUSH BUTTON RESET SWITCH W
  • 1 verified cross-reference
  • Primary manufacturer: Advanced Measurement Technology Inc
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Timer,scaler, cataloged under National Stock Number 6645-00-243-7541, is classified within Federal Supply Class 6645 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Advanced Measurement Technology Inc. Government technical data includes 1 verified specification, 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. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6645-00-243-7541
Primary Part Number431B
Item NameTimer,scaler
FSC / FSG6645 / 66 — No Item Name Available
ManufacturerAdvanced Measurement Technology Inc
StatusACTIVE
General Characteristics Item Description99999.9 SECOND TIME CAPACITY,0.1 SECOND TIME INTERVAL,6 VERTICAL COLUMNS NUMBERED 0 TO 9 W/NEON LIGHTS FOR EACH NUMBER,1000 HZ TUNING FORK OSCILLATOR TIME BASE,FRONT PANEL SWITCH FOR TIMER AND SCALER,PUSH BUTTON RESET SWITCH W
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
5985-00-448-6900 INTERCHANGEABLE
Attenuator,variable
6625-00-892-5263 INTERCHANGEABLE
Test Set,radio Frequency Power
3805-01-088-3653 INTERCHANGEABLE
Scraper,tractor
Cross-Reference Index
Part NumberManufacturer
431B PRIMARY Advanced Measurement Technology Inc (USA)
Related Parts
5985-00-448-6900INTERCHANGEABLE
ATTENUATOR,VARIABLE
6625-00-892-5263INTERCHANGEABLE
TEST SET,RADIO FREQUENCY POWER
3805-01-088-3653INTERCHANGEABLE
SCRAPER,TRACTOR

Frequently Asked Questions

What is NSN 6645-00-243-7541?

NSN 6645-00-243-7541 is a Timer,scaler, manufactured by Advanced Measurement Technology Inc, classified under FSC 6645 (No Item Name Available). Status: active.

What are the part numbers for NSN 6645-00-243-7541?

NSN 6645-00-243-7541 has 1 cross-referenced part number: 431B (Advanced Measurement Technology Inc).

What NSN replaces 6645-00-243-7541?

There are 3 known substitutes for 6645-00-243-7541: 5985-00-448-6900, 6625-00-892-5263, 3805-01-088-3653. Verify interchangeability with system specifications before substitution.

What are the specifications of 431B?

Key specifications for 431B: General Characteristics Item Description: 99999.9 SECOND TIME CAPACITY,0.1 SECOND TIME INTERVAL,6 VERTICAL COLUMNS NUMBERED 0 TO 9 W/NEON LIGHTS FOR EACH NUMBER,1000 HZ TUNING FORK OSCILLATOR TIME BASE,FRONT PANEL SWITCH FOR TIMER AND SCALER,PUSH BUTTON RESET SWITCH W. 1 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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