The Guard,fan Impeller, cataloged under National Stock Number 4140-01-474-3790, 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 Mechatronics, Inc. Div National Precision Bearing. Government technical data includes 5 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4140-01-474-3790 |
| Primary Part Number | SG-24 |
| Item Name | Guard,fan Impeller |
| FSC / FSG | 4140 / 41 — Fans, Air Circulators, and Blower Equipment |
| Manufacturer | Mechatronics, Inc. Div National Precision Bearing |
| Status | ACTIVE |
| Overall Diameter | 2.090 INCHES NOMINAL IN |
| Mounting Method | HOLE |
| Shape | ROUND |
| Body Material | STEEL |
| Surface Treatment | CHROMATE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| SG-24 PRIMARY | Mechatronics, Inc. Div National Precision Bearing (USA) |
| Reference | Meaning |
|---|---|
| SG-24 | 7/2 Vendor item drawing reference U.S. Government activity |
NSN 4140-01-474-3790 is a Guard,fan Impeller, manufactured by Mechatronics, Inc. Div National Precision Bearing, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
NSN 4140-01-474-3790 has 1 manufacturer part number on file: SG-24 (Mechatronics, Inc. Div National Precision Bearing).
Key specifications for SG-24: Overall Diameter: 2.090 INCHES NOMINAL IN; Mounting Method: HOLE; Shape: ROUND; Body Material: STEEL. 5 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.
NSN 4140-01-474-3790 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.