PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

WS4SLBIndicator,wind Speed

Electric Speed Indicator Co · NSN 6660-00-880-4959 · FSC 6660 · No Item Name Available
Verified by PartsTable
NSN 6660-00-880-4959 — this item is cataloged by the U.S. Government under National Stock Number 6660-00-880-4959. Primary manufacturer part number: WS4SLB.
Features
  • Indicator,wind Speed — FSC 6660
  • 10 verified cross-references
  • Primary manufacturer: Electric Speed Indicator Co
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Indicator,wind Speed, cataloged under National Stock Number 6660-00-880-4959, is classified within Federal Supply Class 6660 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Electric Speed Indicator Co. This item has 10 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: Cancelled.

Technical Specifications
ParameterValue
NSN6660-00-880-4959
Primary Part NumberWS4SLB
Item NameIndicator,wind Speed
FSC / FSG6660 / 66 — No Item Name Available
ManufacturerElectric Speed Indicator Co
StatusCANCELLED
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
2920-00-118-55331287375H91 INTERCHANGEABLE
Generator,engine Accessory
Dressta North America Ltd
3110-00-155-6233 INTERCHANGEABLE
Bearing,ball,annular
1680-00-304-66337514 INTERCHANGEABLE
Conduit Assembly,co
Triumph Controls, Llc Dba Triumph Controls, Llc
8125-00-378-9994X73532-C-DSC INTERCHANGEABLE
Bottle,screw Cap
Scientific Specialties Service Inc
6680-00-399-27497514 INTERCHANGEABLE
Connector,equalizer
King Engineering Corporation Dba King-Gage Systems
6625-00-424-59417514 INTERCHANGEABLE
Oscilloscope Mainframe
Tektronix, Inc.
6515-00-442-688214-5815 INTERCHANGEABLE
Forceps,towel
Boss Instruments, Limited Inc
4820-00-470-6234 INTERCHANGEABLE
Valve,globe
5940-00-498-70805453D INTERCHANGEABLE
Terminal,lug
General Cable Corporation Div Corporate
5935-00-636-57777514 INTERCHANGEABLE
Connector,plug,electrical
Hubbell Incorporated (delaware) Dba Wiring Device-Kellems Division
Cross-Reference Index
Part NumberManufacturer
WS4SLB Electric Speed Indicator Co (USA)
F420CWS Airflo Instrument Company, the Dba Airflo Instrument Co (USA)
CA51-6463 Electric Speed Indicator Co (USA)
55D Electric Speed Indicator Co (USA)
D8837-400 Airflo Instrument Company, the Dba Airflo Instrument Co (USA)
7514 Belfort Instrument Company (USA)
WS4SLCB Electric Speed Indicator Co (USA)
2S4SLB Electric Speed Indicator Co (USA)
F420CW4SLSB Electric Speed Indicator Co (USA)
F420C6A Electric Speed Indicator Co (USA)
Related Parts
2920-00-118-5533INTERCHANGEABLE
GENERATOR,ENGINE ACCESSORY
1287375H91
3110-00-155-6233INTERCHANGEABLE
BEARING,BALL,ANNULAR
1680-00-304-6633INTERCHANGEABLE
CONDUIT ASSEMBLY,CO
7514
8125-00-378-9994INTERCHANGEABLE
BOTTLE,SCREW CAP
X73532-C-DSC
6680-00-399-2749INTERCHANGEABLE
CONNECTOR,EQUALIZER
7514
6625-00-424-5941INTERCHANGEABLE
OSCILLOSCOPE MAINFRAME
7514
6515-00-442-6882INTERCHANGEABLE
FORCEPS,TOWEL
14-5815
4820-00-470-6234INTERCHANGEABLE
VALVE,GLOBE
5940-00-498-7080INTERCHANGEABLE
TERMINAL,LUG
5453D
5935-00-636-5777INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
7514
5940-00-688-2381INTERCHANGEABLE
POST,BINDING,ELECTRICAL
7514
4310-01-100-9122INTERCHANGEABLE
DEFLECTOR,DIRT AND LIQUID
7514

Frequently Asked Questions

What is NSN 6660-00-880-4959?

NSN 6660-00-880-4959 is a Indicator,wind Speed, manufactured by Electric Speed Indicator Co, classified under FSC 6660 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6660-00-880-4959?

NSN 6660-00-880-4959 has 10 cross-referenced part numbers: WS4SLB (Electric Speed Indicator Co), F420CWS (Airflo Instrument Company, the Dba Airflo Instrument Co), CA51-6463 (Electric Speed Indicator Co), 55D (Electric Speed Indicator Co), D8837-400 (Airflo Instrument Company, the Dba Airflo Instrument Co) and 5 more.

What NSN replaces 6660-00-880-4959?

There are 12 known substitutes for 6660-00-880-4959: 2920-00-118-5533, 3110-00-155-6233, 1680-00-304-6633 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of WS4SLB?

Key specifications for WS4SLB: End Item Identification: F240; Special Features: 4" SQ ILLUMINATED; REFERENCE DATA, WIND MEASURING SYSTEM, SERIES TYPE 420C, PG 1-3. 2 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6660-00-880-4959 still in active supply?

NSN 6660-00-880-4959 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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