The Lampholder, cataloged under National Stock Number 6250-00-494-0644, is classified within Federal Supply Class 6250 (No Item Name Available) of the Lighting Fixtures and Lamps group. The primary manufacturer of record is Westinghouse Electric Corp. Government technical data includes 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6250-00-494-0644 |
| Primary Part Number | 4133 |
| Item Name | Lampholder |
| FSC / FSG | 6250 / 62 — No Item Name Available |
| Manufacturer | Westinghouse Electric Corp |
| Status | ACTIVE |
| Mounting Feature Type | ANY ACCEPTABLE |
| Material | CERAMIC BODY |
| Style Designator | RING |
| Terminal Quantity | 2 |
| Outside Diameter | 1.500 INCHES NOMINAL IN |
| Lamp Base Type Accommodated | FLEXIBLE STRAP |
| Wattage Rating in Watts | 660.0 |
| Mounting Device Quantity | 1 |
| Hazardous Locations/environmental Protection | NOT RATED |
| Voltage in Volts | 250.0 |
| Terminal Type | SCREW |
| Accessory Mounting Provision | GROOVE |
| Mounting Method | THREADED BUSHING LOCATION NOT OTHERWISE SPECIFIED |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 4133 | Westinghouse Electric Corp (USA) |
| 4133 | Bryant Electric (USA) |
| W-L-142 | Federal Specifications Promulgated by General Services Administration Washington DC (USA) |
| WL142 TYPE VII-3 | Federal Specifications Promulgated by General Services Administration Washington DC (USA) |
| WL142TYPE7-3 | Federal Specifications Promulgated by General Services Administration Washington DC (USA) |
NSN 6250-00-494-0644 is a Lampholder, manufactured by Westinghouse Electric Corp, classified under FSC 6250 (No Item Name Available). Status: active.
NSN 6250-00-494-0644 has 5 cross-referenced part numbers: 4133 (Westinghouse Electric Corp), 4133 (Bryant Electric), W-L-142 (Federal Specifications Promulgated by General Services Administration Washington DC), WL142 TYPE VII-3 (Federal Specifications Promulgated by General Services Administration Washington DC), WL142TYPE7-3 (Federal Specifications Promulgated by General Services Administration Washington DC).
There are 12 known substitutes for 6250-00-494-0644: 4820-00-036-1777, 4920-00-110-2364, 5965-00-232-1925 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 4133: Mounting Feature Type: ANY ACCEPTABLE; Material: CERAMIC BODY; Style Designator: RING; Special Features: 1.500 IN. DIA HOLE REQUIRED FOR MTG IN. 14 total characteristics are documented in the Federal Logistics Information System.