PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2938Indicator,electrical Tachometer

Del Mar Avionics, Llc · NSN 6680-00-684-1561 · FSC 6680 · No Item Name Available
Verified by PartsTable
NSN 6680-00-684-1561 — this item is cataloged by the U.S. Government under National Stock Number 6680-00-684-1561. Primary manufacturer part number: 2938.
Features
  • Indicator,electrical Tachometer — FSC 6680
  • Depth: 3.625 INCHES NOMINAL IN
  • Electrical Connection Quantity: 2
  • Scale Range: -0.1 TO 8000.0 REVOLUTIONS PER MINUTE SINGLE INDICATOR SINGLE SCALE
  • Color: WHITE BACKGROUND OVERALL
  • Pointer Type: CLOCK-HAND SINGLE POINTER
  • Mounting Stud Diameter: 0.173 INCHES NOMINAL IN
  • Color: WHITE POINTER OVERALL
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Indicator,electrical Tachometer, cataloged under National Stock Number 6680-00-684-1561, is classified within Federal Supply Class 6680 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Del Mar Avionics, Llc. Government technical data includes 11 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
NSN6680-00-684-1561
Primary Part Number2938
Item NameIndicator,electrical Tachometer
FSC / FSG6680 / 66 — No Item Name Available
ManufacturerDel Mar Avionics, Llc
StatusACTIVE
Depth3.625 INCHES NOMINAL IN
Electrical Connection Quantity2
Scale Range-0.1 TO 8000.0 REVOLUTIONS PER MINUTE SINGLE INDICATOR SINGLE SCALE
ColorWHITE BACKGROUND OVERALL
Pointer TypeCLOCK-HAND SINGLE POINTER
Mounting Stud Diameter0.173 INCHES NOMINAL IN
ColorWHITE POINTER OVERALL
Current TypeAC
Contact Quantity2
Presentation TypeSYNCHRO MOTOR
Mounting Flange Width2.380 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
4920-00-067-81572938 INTERCHANGEABLE
Case Assembly,kit C
Marvel Manufacturing Co Div the Marvel Manufacturing Company
4930-00-078-4939 INTERCHANGEABLE
Tank and Pump Unit,fuel Dispensi
5965-00-263-12269000S6501F73819 INTERCHANGEABLE
Box,handset Storage
Naval Ship Systems Command
4030-00-352-617429-3-8 INTERCHANGEABLE
Socket,wire Rope
Erie Strayer Co
5815-00-961-8849 INTERCHANGEABLE
Cam Follower,ribbon
5940-00-993-907392975 INTERCHANGEABLE
Adapter,radio Frequency Cable
Amphenol Corporation Div Amphenol Rf
5330-01-121-30912938 INTERCHANGEABLE
Gasket,cap
Curtiss-Wright Flow Control Corporation Dba Farris Engineering Div Curtiss-Wright Valves Division- Farris
5305-01-294-93929240-032-38 INTERCHANGEABLE
Screw,machine
Naval Sea Systems Command Logistics Support Engineering Activity
5930-01-299-76802938 INTERCHANGEABLE
Switch,push
Janco Corporation Dba Janco Corp Div Mason Controls
5998-01-543-33252938 INTERCHANGEABLE
Circuit Card Assembly
Technobox Inc
Cross-Reference Index
Part NumberManufacturer
2938 Del Mar Avionics, Llc (USA)
Related Parts
4920-00-067-8157INTERCHANGEABLE
CASE ASSEMBLY,KIT C
2938
4930-00-078-4939INTERCHANGEABLE
TANK AND PUMP UNIT,FUEL DISPENSI
5965-00-263-1226INTERCHANGEABLE
BOX,HANDSET STORAGE
9000S6501F73819
4030-00-352-6174INTERCHANGEABLE
SOCKET,WIRE ROPE
29-3-8
5815-00-961-8849INTERCHANGEABLE
CAM FOLLOWER,RIBBON
5940-00-993-9073INTERCHANGEABLE
ADAPTER,RADIO FREQUENCY CABLE
92975
5330-01-121-3091INTERCHANGEABLE
GASKET,CAP
2938
5305-01-294-9392INTERCHANGEABLE
SCREW,MACHINE
9240-032-38
5930-01-299-7680INTERCHANGEABLE
SWITCH,PUSH
2938
5998-01-543-3325INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
2938
6510-01-549-6058INTERCHANGEABLE
WOUND PACK,HEMOSTATIC TREATMENT
FG08830521CS
6030-01-625-8666INTERCHANGEABLE
FIBER OPTIC LINK DE

Frequently Asked Questions

What is NSN 6680-00-684-1561?

NSN 6680-00-684-1561 is a Indicator,electrical Tachometer, manufactured by Del Mar Avionics, Llc, classified under FSC 6680 (No Item Name Available). Status: active.

What are the part numbers for NSN 6680-00-684-1561?

NSN 6680-00-684-1561 has 1 cross-referenced part number: 2938 (Del Mar Avionics, Llc).

What NSN replaces 6680-00-684-1561?

There are 12 known substitutes for 6680-00-684-1561: 4920-00-067-8157, 4930-00-078-4939, 5965-00-263-1226 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 2938?

Key specifications for 2938: Depth: 3.625 INCHES NOMINAL IN; Electrical Connection Quantity: 2; Scale Range: -0.1 TO 8000.0 REVOLUTIONS PER MINUTE SINGLE INDICATOR SINGLE SCALE; Color: WHITE BACKGROUND OVERALL. 11 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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