The Holder,lamp, cataloged under National Stock Number 6240-01-475-9503, is classified within Federal Supply Class 6240 (Electric Lamps) of the Lighting Fixtures and Lamps group. The manufacturer of record is Luminescent Systems, Inc Dba Lsi Div Luminescent Systems, Inc, Ny. Government technical data includes 6 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6240-01-475-9503 |
| Primary Part Number | 20-00179-001 |
| Item Name | Holder,lamp |
| FSC / FSG | 6240 / 62 — Electric Lamps |
| Manufacturer | Luminescent Systems, Inc Dba Lsi Div Luminescent Systems, Inc, Ny |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 1 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY |
| Overall Diameter | 0.438 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN |
| Unthreaded Mounting Hole Diameter | 0.297 INCHES NOMINAL SINGLE MOUNTING FACILITY IN |
| Style Designator | CYLINDRICAL |
| Material Document and Classification | QQ-A-250/4, T351 FED SPEC SINGLE MATERIAL RESPONSE |
| Material | ALUMINUM ALLOY 2024 |
| 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 |
|---|---|
| 20-00179-001 PRIMARY | Luminescent Systems, Inc Dba Lsi Div Luminescent Systems, Inc, Ny (USA) |
NSN 6240-01-475-9503 is a Holder,lamp, manufactured by Luminescent Systems, Inc Dba Lsi Div Luminescent Systems, Inc, Ny, classified under FSC 6240, Electric Lamps. Status: active.
NSN 6240-01-475-9503 has 1 manufacturer part number on file: 20-00179-001 (Luminescent Systems, Inc Dba Lsi Div Luminescent Systems, Inc, Ny).
Key specifications for 20-00179-001: Mounting Facility Type and Quantity: 1 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY; Overall Diameter: 0.438 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN; Unthreaded Mounting Hole Diameter: 0.297 INCHES NOMINAL SINGLE MOUNTING FACILITY IN; Style Designator: CYLINDRICAL. 6 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.