The Lamp,fluorescent, cataloged under National Stock Number 6240-01-457-7978, is classified within Federal Supply Class 6240 (Electric Lamps) of the Lighting Fixtures and Lamps group. The manufacturer of record is W.w. Grainger, Inc. Div Government Sales Division. Government technical data includes 11 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 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6240-01-457-7978 |
| Primary Part Number | 3V477 |
| Item Name | Lamp,fluorescent |
| FSC / FSG | 6240 / 62 — Electric Lamps |
| Manufacturer | W.w. Grainger, Inc. Div Government Sales Division |
| Status | ACTIVE |
| Base Style | MEDIUM BIPIN (FLUORESCENT) |
| Rated Average Life | HOURS |
| Bulb Diameter | 1.500 INCHES NOMINAL IN |
| Bulb Designator | T12-1 1/2 |
| Wattage Rating | 34.000 WATTS |
| Emitted Light Characteristic | WHITE, COOL |
| Starting Characteristic | RAPID |
| Bulb Style | T (TUBULAR) |
| Color Temp in Deg Kelvin | 4100.0 |
| Voltage Rating | 110.000 VOLTS NOMINAL |
| Average Life Rating in Hours | 22000.0 |
| 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 |
|---|---|
| 3V477 PRIMARY | W.w. Grainger, Inc. Div Government Sales Division (USA) |
NSN 6240-01-457-7978 is a Lamp,fluorescent, manufactured by W.w. Grainger, Inc. Div Government Sales Division, classified under FSC 6240, Electric Lamps. Status: active.
NSN 6240-01-457-7978 has 1 manufacturer part number on file: 3V477 (W.w. Grainger, Inc. Div Government Sales Division).
1 possible match (shared part number, not a government interchangeability claim): 6240-01-527-4088. Verify interchangeability with system specifications before substitution.
Key specifications for 3V477: Base Style: MEDIUM BIPIN (FLUORESCENT); Rated Average Life: HOURS; Bulb Diameter: 1.500 INCHES NOMINAL IN; Bulb Designator: T12-1 1/2. 11 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.