The Lamp,incandescent, cataloged under National Stock Number 6240-01-358-6058, 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 13 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 6240-01-358-6058 |
| Primary Part Number | W532 |
| Item Name | Lamp,incandescent |
| FSC / FSG | 6240 / 62 — Electric Lamps |
| Manufacturer | Westron Corporation Dba Westron Lighting |
| Status | ACTIVE |
| Bulb Light Transmission Characteristic | TRANSLUCENT |
| Filament Designation | C-9 |
| Base Style | MEDIUM SCREW |
| Rated Average Life | HOURS |
| Bulb Designator | AT-21 |
| Filament Heavy Duty Service Rating | EXTENDED SERVICE |
| Wattage Rating | 185.000 WATTS |
| Emitted Light Characteristic | WHITE, TRANSLUCENT |
| Light Output Rating | 2900.000 LUMENS NOMINAL SINGLE RATING |
| Bulb Style | BT (BULGED TUBULAR) |
| Light Intensity Distribution Feature | INSIDE FROSTED |
| Voltage Rating | 120.000 VOLTS MINIMUM AND 125.000 VOLTS MAXIMUM |
| Average Life Rating in Hours | 4500.0 |
| 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 |
|---|---|
| W532 | Westron Corporation Dba Westron Lighting (USA) |
| Reference | Meaning |
|---|---|
| 532 | 5/9 Secondary reference Duro-Test Lighting |
| HG417 | 3/9 Design control — primary reference Ltg, Ltd. Dba Superior Lamp and Supply |
| 532 | 5/9 Secondary reference U.S. Government activity |
NSN 6240-01-358-6058 is a Lamp,incandescent, manufactured by Westron Corporation Dba Westron Lighting, classified under FSC 6240, Electric Lamps. Status: active.
NSN 6240-01-358-6058 has 1 manufacturer part number on file: W532 (Westron Corporation Dba Westron Lighting).
1 possible match (shared part number, not a government interchangeability claim): 5995-01-533-1886. Verify interchangeability with system specifications before substitution.
Key specifications for W532: Bulb Light Transmission Characteristic: TRANSLUCENT; Filament Designation: C-9; Base Style: MEDIUM SCREW; Rated Average Life: HOURS. 13 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.