PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4050ATachometer,mechanical,handheld

Jaeger Watch Co · NSN 6680-00-490-3434 · FSC 6680 · No Item Name Available
Verified by PartsTable
NSN 6680-00-490-3434 — this item is cataloged by the U.S. Government under National Stock Number 6680-00-490-3434. Primary manufacturer part number: 4050A.
Features
  • Tachometer,mechanical,handheld — FSC 6680
  • Operating Range: +0.0 TO 1000.0 FEET PER MINUTE AND +0.0 TO 1000.0 REVOLUTIONS PER MINUTE FT
  • Accessory Components and Quantity: 1 CONICAL POINT,RUBBER,1 DRIVE SHAFT
  • Speed Selector: NOT PROVIDED
  • Unit Type: CHRONOMETRIC
  • Scale Quantity: 2
  • Manual Reset: PROVIDED
  • Pointer Quantity: 2
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Tachometer,mechanical,handheld, cataloged under National Stock Number 6680-00-490-3434, is classified within Federal Supply Class 6680 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Jaeger Watch Co. Government technical data includes 13 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. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6680-00-490-3434
Primary Part Number4050A
Item NameTachometer,mechanical,handheld
FSC / FSG6680 / 66 — No Item Name Available
ManufacturerJaeger Watch Co
StatusACTIVE
Operating Range+0.0 TO 1000.0 FEET PER MINUTE AND +0.0 TO 1000.0 REVOLUTIONS PER MINUTE FT
Accessory Components and Quantity1 CONICAL POINT,RUBBER,1 DRIVE SHAFT
Speed SelectorNOT PROVIDED
Unit TypeCHRONOMETRIC
Scale Quantity2
Manual ResetPROVIDED
Pointer Quantity2
Scale Measurement Range+0.0 TO 9.0
Time Interval in Seconds6.0
Scale Measurement UnitREVOLUTIONS PER MINUTE
Scale Smallest Increment10.0 REVOLUTIONS PER MINUTE AND 100.0 REVOLUTIONS PER MINUTE
Carrying CaseNOT PROVIDED
Measurement UnitFEET PER MINUTE AND REVOLUTIONS PER MINUTE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
3110-00-190-92604050 INTERCHANGEABLE
Bearing,ball,annular
Schatz Bearing Corporation Dba Schatz Bearing Corp
6645-00-724-61204050A INTERCHANGEABLE
Balance Assembly
Wakmann Watch Company Inc
4910-01-237-02924070 INTERCHANGEABLE
Mounter and Demounter,pneumatic
Hennessy Industries, Llc.
6625-01-266-1782 INTERCHANGEABLE
Test Set,insulation Breakdown
Cross-Reference Index
Part NumberManufacturer
4050A Jaeger Watch Co (USA)
Related Parts
3110-00-190-9260INTERCHANGEABLE
BEARING,BALL,ANNULAR
4050
6645-00-724-6120INTERCHANGEABLE
BALANCE ASSEMBLY
4050A
4910-01-237-0292INTERCHANGEABLE
MOUNTER AND DEMOUNTER,PNEUMATIC
4070
6625-01-266-1782INTERCHANGEABLE
TEST SET,INSULATION BREAKDOWN

Frequently Asked Questions

What is NSN 6680-00-490-3434?

NSN 6680-00-490-3434 is a Tachometer,mechanical,handheld, manufactured by Jaeger Watch Co, classified under FSC 6680 (No Item Name Available). Status: active.

What are the part numbers for NSN 6680-00-490-3434?

NSN 6680-00-490-3434 has 1 cross-referenced part number: 4050A (Jaeger Watch Co).

What NSN replaces 6680-00-490-3434?

There are 4 known substitutes for 6680-00-490-3434: 3110-00-190-9260, 6645-00-724-6120, 4910-01-237-0292 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 4050A?

Key specifications for 4050A: Operating Range: +0.0 TO 1000.0 FEET PER MINUTE AND +0.0 TO 1000.0 REVOLUTIONS PER MINUTE FT; Accessory Components and Quantity: 1 CONICAL POINT,RUBBER,1 DRIVE SHAFT; Speed Selector: NOT PROVIDED; Unit Type: CHRONOMETRIC. 13 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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