PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2591Lamp,incandescent

Beseler, Charles Co Inc · NSN 6240-01-238-4358 · FSC 6240 · No Item Name Available
Verified by PartsTable
NSN 6240-01-238-4358 — this item is cataloged by the U.S. Government under National Stock Number 6240-01-238-4358. Primary manufacturer part number: 2591.
Features
  • Lamp,incandescent — FSC 6240
  • Specification/standard Data: 08108-DDF PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
  • Wattage Rating: 55.000 WATTS
  • Emitted Light Characteristic: COLORLESS
  • Voltage Rating: 17.000 VOLTS NOMINAL
  • Burning Position: BASE DOWN TO HORIZONTAL
  • Base Style: 2-PIN
  • Bulb Style: MR (ARBITARY DESIGNATION FOR LAMP WITH INTEGRAL REFLECTOR)
Applications
  • Area illumination
  • Indicator and warning display
  • Navigation and signal lighting
General Description

The Lamp,incandescent, cataloged under National Stock Number 6240-01-238-4358, is classified within Federal Supply Class 6240 (No Item Name Available) of the Lighting Fixtures and Lamps group. The primary manufacturer of record is Beseler, Charles Co Inc. Government technical data includes 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6240-01-238-4358
Primary Part Number2591
Item NameLamp,incandescent
FSC / FSG6240 / 62 — No Item Name Available
ManufacturerBeseler, Charles Co Inc
StatusACTIVE
Specification/standard Data08108-DDF PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
Wattage Rating55.000 WATTS
Emitted Light CharacteristicCOLORLESS
Voltage Rating17.000 VOLTS NOMINAL
Burning PositionBASE DOWN TO HORIZONTAL
Base Style2-PIN
Bulb StyleMR (ARBITARY DESIGNATION FOR LAMP WITH INTEGRAL REFLECTOR)
Rated Average LifeHOURS
Filament Heavy Duty Service RatingNOT RATED
Current Rating for Which Designed3.235 AMPERES NOMINAL
Average Life Rating in Hours300.0
Bulb Light Transmission CharacteristicTRANSPARENT
Bulb DesignatorMR-16
Supplementary FeaturesBASE GX5.3
Light Intensity Distribution FeatureDICHROIC REFLECTOR
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5950-00-068-7943577R593H01 INTERCHANGEABLE
Transformer,power
Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp
6220-00-115-5038259-001-GRN INTERCHANGEABLE
Lens,light
Perko Inc
5330-00-433-1475 INTERCHANGEABLE
Gasket
5340-00-690-88912591 INTERCHANGEABLE
Button,plug
Heyco Inc Dba Heyco Products
5961-00-910-6357 INTERCHANGEABLE
Semiconductor Device,diode
6550-01-023-79772591 INTERCHANGEABLE
Test Kit,bilirubin Determination
Siemens Medical Solutions Diagnostics
3110-01-180-2337 INTERCHANGEABLE
Bearing,ball,annular
4820-01-215-2271259-01 INTERCHANGEABLE
Plunger,valve
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
5935-01-342-6659G386460-1 INTERCHANGEABLE
Adapter,connector
Raytheon Company Dba Raytheon Co
5950-01-347-2152300103 INTERCHANGEABLE
Transformer,power
Astronics Test Systems Inc
Cross-Reference Index
Part NumberManufacturer
2591 Beseler, Charles Co Inc (USA)
DDF Lamp Industry for Use with Industry Designations and Abbreviations for Lamps
Related Parts
5950-00-068-7943INTERCHANGEABLE
TRANSFORMER,POWER
577R593H01
6220-00-115-5038INTERCHANGEABLE
LENS,LIGHT
259-001-GRN
5330-00-433-1475INTERCHANGEABLE
GASKET
5340-00-690-8891INTERCHANGEABLE
BUTTON,PLUG
2591
5961-00-910-6357INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
6550-01-023-7977INTERCHANGEABLE
TEST KIT,BILIRUBIN DETERMINATION
2591
3110-01-180-2337INTERCHANGEABLE
BEARING,BALL,ANNULAR
4820-01-215-2271INTERCHANGEABLE
PLUNGER,VALVE
259-01
5935-01-342-6659INTERCHANGEABLE
ADAPTER,CONNECTOR
G386460-1
5950-01-347-2152INTERCHANGEABLE
TRANSFORMER,POWER
300103
6750-01-382-0284INTERCHANGEABLE
PAPER,PHOTOGRAPHIC
5340-01-388-0496INTERCHANGEABLE
WHEEL,CASTER

Frequently Asked Questions

What is NSN 6240-01-238-4358?

NSN 6240-01-238-4358 is a Lamp,incandescent, manufactured by Beseler, Charles Co Inc, classified under FSC 6240 (No Item Name Available). Status: active.

What are the part numbers for NSN 6240-01-238-4358?

NSN 6240-01-238-4358 has 2 cross-referenced part numbers: 2591 (Beseler, Charles Co Inc), DDF (Lamp Industry for Use with Industry Designations and Abbreviations for Lamps).

What NSN replaces 6240-01-238-4358?

There are 12 known substitutes for 6240-01-238-4358: 5950-00-068-7943, 6220-00-115-5038, 5330-00-433-1475 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 2591?

Key specifications for 2591: Specification/standard Data: 08108-DDF PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD; Wattage Rating: 55.000 WATTS; Emitted Light Characteristic: COLORLESS; Overall Length: 47.0 MILLIMETERS MAXIMUM MM. 18 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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