PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

250E28/MERCULITE-120/MED/HOWLamp,mercury Vapor

Westron Corporation Dba Westron Lighting · NSN 6240-01-123-4998 · FSC 6240 · No Item Name Available
Verified by PartsTable
NSN 6240-01-123-4998 — this item is cataloged by the U.S. Government under National Stock Number 6240-01-123-4998. Primary manufacturer part number: 250E28/MERCULITE-120/MED/HOW.
Features
  • Lamp,mercury Vapor — FSC 6240
  • Average Life Rating in Hours: 12000.0
  • Emitted Light Characteristic: WHITE, DELUXE
  • Bulb Designator: E-28
  • Rated Average Life: HOURS
  • Base Style: MEDIUM SCREW
  • Wattage Rating: 250.000 WATTS
  • Bulb Light Transmission Characteristic: TRANSPARENT
Applications
  • Area illumination
  • Indicator and warning display
  • Navigation and signal lighting
General Description

The Lamp,mercury Vapor, cataloged under National Stock Number 6240-01-123-4998, is classified within Federal Supply Class 6240 (No Item Name Available) of the Lighting Fixtures and Lamps group. The primary manufacturer of record is Westron Corporation Dba Westron Lighting. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN6240-01-123-4998
Primary Part Number250E28/MERCULITE-120/MED/HOW
Item NameLamp,mercury Vapor
FSC / FSG6240 / 62 — No Item Name Available
ManufacturerWestron Corporation Dba Westron Lighting
StatusCANCELLED
Average Life Rating in Hours12000.0
Emitted Light CharacteristicWHITE, DELUXE
Bulb DesignatorE-28
Rated Average LifeHOURS
Base StyleMEDIUM SCREW
Wattage Rating250.000 WATTS
Bulb Light Transmission CharacteristicTRANSPARENT
Supplementary FeaturesPOTENTIAL EXPLOSION HAZARD
Bulb StyleE (ELIPTICAL)
Light Output Rating6500.000 LUMENS NOMINAL SINGLE RATING
Voltage Rating120.000 VOLTS NOMINAL
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 6
3110-00-227-41652062-14BP5904A INTERCHANGEABLE
Bearing,ball,thrust
Federal-Mogul Corp Government Sales Dept
1005-00-805-3939 INTERCHANGEABLE
Follower,cartridge,small Arms
5905-01-082-810537102 INTERCHANGEABLE
Resistor Assembly
Unison Industries Llc
5330-01-104-268537102 INTERCHANGEABLE
Gasket
Leroi International Inc Dba Compair Leroi
6145-01-419-390437102 INTERCHANGEABLE
Wire,electrical
Belden Wire and Cable Co Wire and Cable Office
3040-01-465-688337102 INTERCHANGEABLE
Gearshaft,bevel
Moog Inc. Dba Ampac-Isp Corp
Cross-Reference Index
Part NumberManufacturer
250E28/MERCULITE-120/MED/HOW PRIMARY Westron Corporation Dba Westron Lighting (USA)
250E28/SB/DX/HG/2 Philips Electronics North America Corporation Dba Philips Lighting Div Philips Lighting Company (USA)
37102 Westron Corporation Dba Westron Lighting (USA)
S250E28/DX/M Philips Electronics North America Corporation Dba Philips Lighting Div Philips Lighting Company (USA)
Related Parts
3110-00-227-4165INTERCHANGEABLE
BEARING,BALL,THRUST
2062-14BP5904A
1005-00-805-3939INTERCHANGEABLE
FOLLOWER,CARTRIDGE,SMALL ARMS
5905-01-082-8105INTERCHANGEABLE
RESISTOR ASSEMBLY
37102
5330-01-104-2685INTERCHANGEABLE
GASKET
37102
6145-01-419-3904INTERCHANGEABLE
WIRE,ELECTRICAL
37102
3040-01-465-6883INTERCHANGEABLE
GEARSHAFT,BEVEL
37102

Frequently Asked Questions

What is NSN 6240-01-123-4998?

NSN 6240-01-123-4998 is a Lamp,mercury Vapor, manufactured by Westron Corporation Dba Westron Lighting, classified under FSC 6240 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6240-01-123-4998?

NSN 6240-01-123-4998 has 4 cross-referenced part numbers: 250E28/MERCULITE-120/MED/HOW (Westron Corporation Dba Westron Lighting), 250E28/SB/DX/HG/2 (Philips Electronics North America Corporation Dba Philips Lighting Div Philips Lighting Company), 37102 (Westron Corporation Dba Westron Lighting), S250E28/DX/M (Philips Electronics North America Corporation Dba Philips Lighting Div Philips Lighting Company).

What NSN replaces 6240-01-123-4998?

There are 6 known substitutes for 6240-01-123-4998: 3110-00-227-4165, 1005-00-805-3939, 5905-01-082-8105 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 250E28/MERCULITE-120/MED/HOW?

Key specifications for 250E28/MERCULITE-120/MED/HOW: Average Life Rating in Hours: 12000.0; Emitted Light Characteristic: WHITE, DELUXE; Bulb Designator: E-28; Rated Average Life: HOURS. 13 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6240-01-123-4998 still in active supply?

NSN 6240-01-123-4998 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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