PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MARK II-WSIIndicator,wind Speed

Dwyer Instruments Inc · NSN 6660-00-801-6393 · FSC 6660 · No Item Name Available
Verified by PartsTable
NSN 6660-00-801-6393 — this item is cataloged by the U.S. Government under National Stock Number 6660-00-801-6393. Primary manufacturer part number: MARK II-WSI.
Features
  • Indicator,wind Speed — FSC 6660
  • Depth: 0.625 INCHES NOMINAL IN
  • Width: 1.625 INCHES NOMINAL IN
  • Information Recorded: WIND SPEED
  • Length: 6.719 INCHES NOMINAL IN
  • 3 verified cross-references
  • Primary manufacturer: Dwyer Instruments Inc
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Indicator,wind Speed, cataloged under National Stock Number 6660-00-801-6393, is classified within Federal Supply Class 6660 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Dwyer Instruments Inc. Government technical data includes 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6660-00-801-6393
Primary Part NumberMARK II-WSI
Item NameIndicator,wind Speed
FSC / FSG6660 / 66 — No Item Name Available
ManufacturerDwyer Instruments Inc
StatusACTIVE
Depth0.625 INCHES NOMINAL IN
Width1.625 INCHES NOMINAL IN
Information RecordedWIND SPEED
Length6.719 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
4730-00-218-58251630-B1 INTERCHANGEABLE
Fitting,lubrication
Alemite, Llc Dba Skf Usa Inc.
Cross-Reference Index
Part NumberManufacturer
MARK II-WSI PRIMARY Dwyer Instruments Inc (USA)
HH-WSI Dwyer Instruments Inc (USA)
1-630B Dwyer Instruments Inc (USA)
Related Parts
4730-00-218-5825INTERCHANGEABLE
FITTING,LUBRICATION
1630-B1

Frequently Asked Questions

What is NSN 6660-00-801-6393?

NSN 6660-00-801-6393 is a Indicator,wind Speed, manufactured by Dwyer Instruments Inc, classified under FSC 6660 (No Item Name Available). Status: active.

What are the part numbers for NSN 6660-00-801-6393?

NSN 6660-00-801-6393 has 3 cross-referenced part numbers: MARK II-WSI (Dwyer Instruments Inc), HH-WSI (Dwyer Instruments Inc), 1-630B (Dwyer Instruments Inc).

What NSN replaces 6660-00-801-6393?

There is 1 known substitute for 6660-00-801-6393: 4730-00-218-5825. Verify interchangeability with system specifications before substitution.

What are the specifications of MARK II-WSI?

Key specifications for MARK II-WSI: Depth: 0.625 INCHES NOMINAL IN; Width: 1.625 INCHES NOMINAL IN; Information Recorded: WIND SPEED; Length: 6.719 INCHES NOMINAL IN. 4 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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