PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

66740Light,indicator

Mine Safety Appliances Company · NSN 6210-01-238-1657 · FSC 6210 · No Item Name Available
Verified by PartsTable
NSN 6210-01-238-1657 — this item is cataloged by the U.S. Government under National Stock Number 6210-01-238-1657. Primary manufacturer part number: 66740.
Features
  • Light,indicator — FSC 6210
  • Lens Light Transmission Characteristic: TRANSLUCENT SINGLE LIGHT FIRST POSITION HORIZONTAL
  • Lens Color: RED SINGLE LIGHT FIRST POSITION HORIZONTAL
  • Transmitted Light Color: RED SINGLE LIGHT FIRST POSITION HORIZONTAL FULL DISPLAY DIVISION A
  • Lens Quantity: 1
  • Mounting Method: FRICTION
  • 1 verified cross-reference
  • Primary manufacturer: Mine Safety Appliances Company
Applications
  • Area illumination
  • Indicator and warning display
  • Navigation and signal lighting
General Description

The Light,indicator, cataloged under National Stock Number 6210-01-238-1657, is classified within Federal Supply Class 6210 (No Item Name Available) of the Lighting Fixtures and Lamps group. The primary manufacturer of record is Mine Safety Appliances Company. Government technical data includes 5 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. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6210-01-238-1657
Primary Part Number66740
Item NameLight,indicator
FSC / FSG6210 / 62 — No Item Name Available
ManufacturerMine Safety Appliances Company
StatusACTIVE
Lens Light Transmission CharacteristicTRANSLUCENT SINGLE LIGHT FIRST POSITION HORIZONTAL
Lens ColorRED SINGLE LIGHT FIRST POSITION HORIZONTAL
Transmitted Light ColorRED SINGLE LIGHT FIRST POSITION HORIZONTAL FULL DISPLAY DIVISION A
Lens Quantity1
Mounting MethodFRICTION
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
6620-00-526-846866740 INTERCHANGEABLE
Gage,pressure,dial Indicating
Cummins Inc.
5310-00-550-372215165 INTERCHANGEABLE
Washer,lock
Hyster-Yale Group, Inc. Div Hyster-Yale Materials Handling
5961-01-056-5019925427-501B INTERCHANGEABLE
Transistor
Raytheon Company Dba Raytheon
Cross-Reference Index
Part NumberManufacturer
66740 PRIMARY Mine Safety Appliances Company (USA)
Related Parts
6620-00-526-8468INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
66740
5310-00-550-3722INTERCHANGEABLE
WASHER,LOCK
15165
5961-01-056-5019INTERCHANGEABLE
TRANSISTOR
925427-501B

Frequently Asked Questions

What is NSN 6210-01-238-1657?

NSN 6210-01-238-1657 is a Light,indicator, manufactured by Mine Safety Appliances Company, classified under FSC 6210 (No Item Name Available). Status: active.

What are the part numbers for NSN 6210-01-238-1657?

NSN 6210-01-238-1657 has 1 cross-referenced part number: 66740 (Mine Safety Appliances Company).

What NSN replaces 6210-01-238-1657?

There are 3 known substitutes for 6210-01-238-1657: 6620-00-526-8468, 5310-00-550-3722, 5961-01-056-5019. Verify interchangeability with system specifications before substitution.

What are the specifications of 66740?

Key specifications for 66740: Lens Light Transmission Characteristic: TRANSLUCENT SINGLE LIGHT FIRST POSITION HORIZONTAL; Lens Color: RED SINGLE LIGHT FIRST POSITION HORIZONTAL; Transmitted Light Color: RED SINGLE LIGHT FIRST POSITION HORIZONTAL FULL DISPLAY DIVISION A; Special Features: 120 VOLT OPERATION. 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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