The Fan,centrifugal, cataloged under National Stock Number 4140-01-686-8748, 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 Howden American Fan Company Dba American Fan Co Div Howden Usa Company. Government technical data includes 12 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 | 4140-01-686-8748 |
| Primary Part Number | RB-452 38.5 |
| Item Name | Fan,centrifugal |
| FSC / FSG | 4140 / 41 — Fans, Air Circulators, and Blower Equipment |
| Manufacturer | Howden American Fan Company Dba American Fan Co Div Howden Usa Company |
| Status | ACTIVE |
| Phase | THREE |
| Frequency in Hertz | 60.0 |
| Inclosure Type | FULLY INCLOSED |
| Voltage in Volts and Current Type | 460.0 AC |
| Drive Type | GEAR |
| Prime Mover Power Rating | 75.0 HORSEPOWER |
| Style Designator | FIXED |
| Operating Speed at Rated Capacity in RPM | 3540.0 |
| Material | STEEL CORROSION RESISTING HOUSING OUTSIDE |
| Prime Mover Type | ELECTRIC MOTOR |
| Rotation Direction for Which Designed | CLOCKWISE |
| Air Flow Rate | 2000.0 CUBIC FEET PER MINUTE NOMINAL |
| 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 |
|---|---|
| RB-452 38.5 PRIMARY | Howden American Fan Company Dba American Fan Co Div Howden Usa Company (USA) |
NSN 4140-01-686-8748 is a Fan,centrifugal, manufactured by Howden American Fan Company Dba American Fan Co Div Howden Usa Company, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
NSN 4140-01-686-8748 has 1 manufacturer part number on file: RB-452 38.5 (Howden American Fan Company Dba American Fan Co Div Howden Usa Company).
Key specifications for RB-452 38.5: Phase: THREE; Frequency in Hertz: 60.0; Inclosure Type: FULLY INCLOSED; Voltage in Volts and Current Type: 460.0 AC. 12 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.