The Fan,circulating, cataloged under National Stock Number 4140-01-643-1899, 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 Nmb Technologies Corporation. 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 | 4140-01-643-1899 |
| Primary Part Number | 2004KL-04W-B50 |
| Item Name | Fan,circulating |
| FSC / FSG | 4140 / 41 — Fans, Air Circulators, and Blower Equipment |
| Manufacturer | Nmb Technologies Corporation |
| Status | ACTIVE |
| Shaft Bearing Type | BALL |
| Length | 1.98 INCHES NOMINAL IN |
| Voltage in Volts and Current Type | 10.2 AC OR 13.8 AC |
| Style Designator | FIXED |
| Operating Speed at Rated Capacity in RPM | 5500.0 |
| Width | 1.98 INCHES NOMINAL IN |
| Material | PLASTIC OVERALL |
| Prime Mover Type | ELECTRIC MOTOR |
| Rotation Direction for Which Designed | CLOCKWISE |
| Prime Mover Drive Shaft Bearing Type | BALL |
| Static Pressure at Specified Air Flow Rate | ERR-060 |
| Air Flow Rate | 10.2 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 |
|---|---|
| 2004KL-04W-B50 PRIMARY | Nmb Technologies Corporation (USA) |
NSN 4140-01-643-1899 is a Fan,circulating, manufactured by Nmb Technologies Corporation, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
NSN 4140-01-643-1899 has 1 manufacturer part number on file: 2004KL-04W-B50 (Nmb Technologies Corporation).
Key specifications for 2004KL-04W-B50: Shaft Bearing Type: BALL; Length: 1.98 INCHES NOMINAL IN; Voltage in Volts and Current Type: 10.2 AC OR 13.8 AC; Style Designator: FIXED. 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.