The Lamp,mercury Vapor, cataloged under National Stock Number 6240-01-313-6855, is classified within Federal Supply Class 6240 (Electric Lamps) of the Lighting Fixtures and Lamps group. The manufacturer of record is Westron Corporation Dba Westron Lighting. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6240-01-313-6855 |
| Primary Part Number | 110R40/MERCULITE-120/MED/FL |
| Item Name | Lamp,mercury Vapor |
| FSC / FSG | 6240 / 62 — Electric Lamps |
| Manufacturer | Westron Corporation Dba Westron Lighting |
| Status | ACTIVE |
| Bulb Light Transmission Characteristic | TRANSPARENT |
| Base Style | MEDIUM SCREW SKIRTED |
| Rated Average Life | HOURS |
| Bulb Designator | R-40 |
| Wattage Rating | 110.000 WATTS |
| Emitted Light Characteristic | COLORLESS |
| Bulb Style | R (REFLECTOR) |
| Voltage Rating | 120.000 VOLTS NOMINAL |
| Average Life Rating in Hours | 12000.0 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 110R40/MERCULITE-120/MED/FL PRIMARY | Westron Corporation Dba Westron Lighting (USA) |
| Reference | Meaning |
|---|---|
| 38110 | 5/9 Secondary reference Westron Corporation Dba Westron Lighting |
NSN 6240-01-313-6855 is a Lamp,mercury Vapor, manufactured by Westron Corporation Dba Westron Lighting, classified under FSC 6240, Electric Lamps. Status: active.
NSN 6240-01-313-6855 has 1 manufacturer part number on file: 110R40/MERCULITE-120/MED/FL (Westron Corporation Dba Westron Lighting).
3 possible matches (shared part number, not a government interchangeability claim): 4720-01-413-4057, 9905-01-569-2114, 5120-01-579-1503. Verify interchangeability with system specifications before substitution.
Key specifications for 110R40/MERCULITE-120/MED/FL: Bulb Light Transmission Characteristic: TRANSPARENT; Base Style: MEDIUM SCREW SKIRTED; Rated Average Life: HOURS; Bulb Designator: R-40. 9 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.