PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1H7027Lamp,incandescent

Caterpillar Inc Div Caterpillar Defense · NSN 6240-00-265-6537 · FSC 6240 · No Item Name Available
Verified by PartsTable
NSN 6240-00-265-6537 — this item is cataloged by the U.S. Government under National Stock Number 6240-00-265-6537. Primary manufacturer part number: 1H7027.
Features
  • Lamp,incandescent — FSC 6240
  • Features Provided: FILAMENT SHIELDING AND HEAT RESISTANT GLASS
  • Light Intensity Distribution Feature: PARABOLIC REFLECTOR
  • Bulb Style: PAR (PARABOLIC, ALUMINIZED REFLECTOR)
  • Filament Heavy Duty Service Rating: NOT RATED
  • Average Life Rating in Hours: 275.0
  • Base Style: THREE CONTACT LUGS
  • Filament Designation: 2C-6
Applications
  • Area illumination
  • Indicator and warning display
  • Navigation and signal lighting
General Description

The Lamp,incandescent, cataloged under National Stock Number 6240-00-265-6537, is classified within Federal Supply Class 6240 (No Item Name Available) of the Lighting Fixtures and Lamps group. The primary manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 9 commercial cross-references from 8 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
NSN6240-00-265-6537
Primary Part Number1H7027
Item NameLamp,incandescent
FSC / FSG6240 / 62 — No Item Name Available
ManufacturerCaterpillar Inc Div Caterpillar Defense
StatusCANCELLED
Features ProvidedFILAMENT SHIELDING AND HEAT RESISTANT GLASS
Light Intensity Distribution FeaturePARABOLIC REFLECTOR
Bulb StylePAR (PARABOLIC, ALUMINIZED REFLECTOR)
Filament Heavy Duty Service RatingNOT RATED
Average Life Rating in Hours275.0
Base StyleTHREE CONTACT LUGS
Filament Designation2C-6
Emitted Light CharacteristicWHITE
Wattage Rating35.000 WATTS AND 45.000 WATTS
Bulb DesignatorPAR-46
Rated Average LifeHOURS
Bulb Light Transmission CharacteristicTRANSPARENT
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5905-00-082-72183X2250 INTERCHANGEABLE
Resistor,fixed,wire Wound
Ward Leonard Ct Llc
5935-00-088-8964MS3108R14S7PX INTERCHANGEABLE
Connector,plug,electrical
Sae International Dba Sae International
5120-00-133-0642 INTERCHANGEABLE
Die,crimping Tool
5955-00-149-9289443-1 INTERCHANGEABLE
Oscillator,crystal Controlled
Ametek Programmable Power, Inc.
5962-00-318-2223 INTERCHANGEABLE
Microcircuit,digital
2520-00-390-94584431 INTERCHANGEABLE
Housing,clutch
Eaton Corp Transmission Div
6625-00-583-15269157156 INTERCHANGEABLE
Detector,radio Frequency
Us Army Aviation and Missile Command
5999-00-674-23324431 INTERCHANGEABLE
Clip,electrical
Cooper Bussmann, Llc Dba Cooper Industries
5310-00-685-8237 INTERCHANGEABLE
Washer,spring Tension
1620-00-699-0275 INTERCHANGEABLE
Support,linkage,damper
Cross-Reference Index
Part NumberManufacturer
193153 General Motors Llc Dba General Motors Llc (USA)
PTCB11089 Prestolite Electric Inc (USA)
1H7027 PRIMARY Caterpillar Inc Div Caterpillar Defense (USA)
193153 General Motors Corp (USA)
TD4465 Wabco Construction and Mining Equipment Group Indianapolis Plant an American Standard Inc Co (USA)
PTCB11089 Prestolite Electric Inc (USA)
4431 General Electric Company (USA)
W-L-50 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
193153 Army Weapons Command Attn Amswe-Ree-S (USA)
Related Parts
5905-00-082-7218INTERCHANGEABLE
RESISTOR,FIXED,WIRE WOUND
3X2250
5935-00-088-8964INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
MS3108R14S7PX
5120-00-133-0642INTERCHANGEABLE
DIE,CRIMPING TOOL
5955-00-149-9289INTERCHANGEABLE
OSCILLATOR,CRYSTAL CONTROLLED
443-1
5962-00-318-2223INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
2520-00-390-9458INTERCHANGEABLE
HOUSING,CLUTCH
4431
6625-00-583-1526INTERCHANGEABLE
DETECTOR,RADIO FREQUENCY
9157156
5999-00-674-2332INTERCHANGEABLE
CLIP,ELECTRICAL
4431
5310-00-685-8237INTERCHANGEABLE
WASHER,SPRING TENSION
1620-00-699-0275INTERCHANGEABLE
SUPPORT,LINKAGE,DAMPER
5310-00-699-1269INTERCHANGEABLE
WASHER,FLAT
020199
5305-01-088-2802INTERCHANGEABLE
SCREW,SHOULDER
4431

Frequently Asked Questions

What is NSN 6240-00-265-6537?

NSN 6240-00-265-6537 is a Lamp,incandescent, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 6240 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6240-00-265-6537?

NSN 6240-00-265-6537 has 9 cross-referenced part numbers: 193153 (General Motors Llc Dba General Motors Llc), PTCB11089 (Prestolite Electric Inc), 1H7027 (Caterpillar Inc Div Caterpillar Defense), 193153 (General Motors Corp), TD4465 (Wabco Construction and Mining Equipment Group Indianapolis Plant an American Standard Inc Co) and 4 more.

What NSN replaces 6240-00-265-6537?

There are 12 known substitutes for 6240-00-265-6537: 5905-00-082-7218, 5935-00-088-8964, 5120-00-133-0642 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1H7027?

Key specifications for 1H7027: Features Provided: FILAMENT SHIELDING AND HEAT RESISTANT GLASS; Light Intensity Distribution Feature: PARABOLIC REFLECTOR; Bulb Style: PAR (PARABOLIC, ALUMINIZED REFLECTOR); Filament Heavy Duty Service Rating: NOT RATED. 13 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6240-00-265-6537 still in active supply?

NSN 6240-00-265-6537 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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