The Housing,centrifugal Fan, cataloged under National Stock Number 4140-01-506-6741, is classified within Federal Supply Class 4140 (Fans, Air Circulators, and Blower Equipment) of the Refrigeration, AC, and Air Circulating Equipment group. The manufacturer of record is Polartherm Oy Dba Thermogate. Government technical data includes 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4140-01-506-6741 |
| Primary Part Number | 2112-99 |
| Item Name | Housing,centrifugal Fan |
| FSC / FSG | 4140 / 41 — Fans, Air Circulators, and Blower Equipment |
| Manufacturer | Polartherm Oy Dba Thermogate |
| Status | ACTIVE |
| Length | 18.740 INCHES NOMINAL IN |
| Outlet Inside Diameter | 18.110 INCHES NOMINAL IN |
| Housing Style | FIXED, INVERTED, ROUND OUTLET |
| Height | 18.740 INCHES NOMINAL IN |
| Prime Mover for Which Designed | ELECTRIC MOTOR |
| Width | 4.720 INCHES NOMINAL IN |
| Material | STEEL AND ALUMINUM HOUSING |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 2112-99 PRIMARY | Polartherm Oy Dba Thermogate (FIN) |
| Reference | Meaning |
|---|---|
| 2112-99 | 5/9 Secondary reference Polartherm Oy |
NSN 4140-01-506-6741 is a Housing,centrifugal Fan, manufactured by Polartherm Oy Dba Thermogate, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
NSN 4140-01-506-6741 has 1 manufacturer part number on file: 2112-99 (Polartherm Oy Dba Thermogate).
Key specifications for 2112-99: Length: 18.740 INCHES NOMINAL IN; Outlet Inside Diameter: 18.110 INCHES NOMINAL IN; Housing Style: FIXED, INVERTED, ROUND OUTLET; Height: 18.740 INCHES NOMINAL IN. 7 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). 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.