PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

249-1Indicator,electrical Tachometer

The Dewey Electronics Corporation Div Pitometer Log Division · NSN 6680-00-358-1958 · FSC 6680 · No Item Name Available
Verified by PartsTable
NSN 6680-00-358-1958 — this item is cataloged by the U.S. Government under National Stock Number 6680-00-358-1958. Primary manufacturer part number: 249-1.
Features
  • Indicator,electrical Tachometer — FSC 6680
  • AC Voltage Rating: 115.0 VOLTS NOMINAL
  • Current Type: AC
  • Phase: SINGLE
  • Material: ALUMINUM CASE
  • Frequency Rating: 60.0 HERTZ NOMINAL
  • 3 verified cross-references
  • Primary manufacturer: The Dewey Electronics Corporation Div Pitometer Log Division
Applications
  • Applications requiring Aluminum Case construction
General Description

The Indicator,electrical Tachometer, cataloged under National Stock Number 6680-00-358-1958, is classified within Federal Supply Class 6680 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is The Dewey Electronics Corporation Div Pitometer Log Division. Government technical data includes 5 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, 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
NSN6680-00-358-1958
Primary Part Number249-1
Item NameIndicator,electrical Tachometer
FSC / FSG6680 / 66 — No Item Name Available
ManufacturerThe Dewey Electronics Corporation Div Pitometer Log Division
StatusACTIVE
AC Voltage Rating115.0 VOLTS NOMINAL
Current TypeAC
PhaseSINGLE
MaterialALUMINUM CASE
Frequency Rating60.0 HERTZ NOMINAL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
3120-00-216-93672491 INTERCHANGEABLE
Bearing Assembly
Northrop Grumman Systems Corporation Div Marine Systems
5340-00-497-8670249-1 INTERCHANGEABLE
Snap Hook
Buckles International, Inc.
5330-00-630-1793710501 INTERCHANGEABLE
Gasket
Hamilton Sundstrand Corporation
2805-00-830-38796B4833 INTERCHANGEABLE
Ring Piston
Caterpillar Inc Div Caterpillar Defense
5915-00-879-2490SM-A-763726 INTERCHANGEABLE
Filter,low Pass
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
6210-01-113-59422-49-1 INTERCHANGEABLE
Light,indicator
Automation Products Group, Inc.
4820-01-165-5889 INTERCHANGEABLE
Seat,valve
2940-01-176-057942491 INTERCHANGEABLE
Filter Element,intake Air Cleane
Wix Corp
6515-01-250-7549 INTERCHANGEABLE
Tube Assembly,gas Anesthesia App
5330-01-307-37801625G 1/4 IN. INTERCHANGEABLE
Packing Material
John Crane, Inc
Cross-Reference Index
Part NumberManufacturer
IC6PNN4-X The Electric Tachometer Corp. (USA)
IC6PNN4-X Dynalec Corporation (USA)
249-1 PRIMARY The Dewey Electronics Corporation Div Pitometer Log Division (USA)
Related Parts
3120-00-216-9367INTERCHANGEABLE
BEARING ASSEMBLY
2491
5340-00-497-8670INTERCHANGEABLE
SNAP HOOK
249-1
5330-00-630-1793INTERCHANGEABLE
GASKET
710501
2805-00-830-3879INTERCHANGEABLE
RING PISTON
6B4833
5915-00-879-2490INTERCHANGEABLE
FILTER,LOW PASS
SM-A-763726
6210-01-113-5942INTERCHANGEABLE
LIGHT,INDICATOR
2-49-1
4820-01-165-5889INTERCHANGEABLE
SEAT,VALVE
2940-01-176-0579INTERCHANGEABLE
FILTER ELEMENT,INTAKE AIR CLEANE
42491
6515-01-250-7549INTERCHANGEABLE
TUBE ASSEMBLY,GAS ANESTHESIA APP
5330-01-307-3780INTERCHANGEABLE
PACKING MATERIAL
1625G 1/4 IN.
6210-01-334-2919INTERCHANGEABLE
LIGHT,INDICATOR
11460090-1
7025-01-459-3503INTERCHANGEABLE
PRINTER,AUTOMATIC DATA PROCESSIN
2491

Frequently Asked Questions

What is NSN 6680-00-358-1958?

NSN 6680-00-358-1958 is a Indicator,electrical Tachometer, manufactured by The Dewey Electronics Corporation Div Pitometer Log Division, classified under FSC 6680 (No Item Name Available). Status: active.

What are the part numbers for NSN 6680-00-358-1958?

NSN 6680-00-358-1958 has 3 cross-referenced part numbers: IC6PNN4-X (The Electric Tachometer Corp.), IC6PNN4-X (Dynalec Corporation), 249-1 (The Dewey Electronics Corporation Div Pitometer Log Division).

What NSN replaces 6680-00-358-1958?

There are 12 known substitutes for 6680-00-358-1958: 3120-00-216-9367, 5340-00-497-8670, 5330-00-630-1793 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 249-1?

Key specifications for 249-1: AC Voltage Rating: 115.0 VOLTS NOMINAL; Current Type: AC; Phase: SINGLE; Material: ALUMINUM CASE. 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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