The Fan,centrifugal, cataloged under National Stock Number 4140-01-558-5546, 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 Twin City Fan Companies Ltd. Dba Tc Axial Div. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Fan,centrifugal |
| FSC / FSG | 4140 — Fans, Air Circulators, and Blower Equipment (FSG 41) |
| Manufacturers | Twin City Fan Companies Ltd. Dba Tc Axial Div (CAGE 61490) |
| Parameter | Value |
|---|---|
| NSN | 4140-01-558-5546 |
| Primary Part Number | BC196979-001 |
| Item Name | Fan,centrifugal |
| FSC / FSG | 4140 / 41 — Fans, Air Circulators, and Blower Equipment |
| Manufacturer | Twin City Fan Companies Ltd. Dba Tc Axial Div |
| Status | ACTIVE |
| 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 |
|---|---|
| BC196979-001 PRIMARY | Twin City Fan Companies Ltd. Dba Tc Axial Div (USA) |
| Reference | Meaning |
|---|---|
| EAS80514 | C/1 Advisory reference — outside the item-of-supply concept Drs Environmental Systems Inc |
| EAS80514 | 7/9 Vendor item drawing reference U.S. Government activity |
| EAS80514-1 | C/1 Advisory reference — outside the item-of-supply concept Drs Environmental Systems Inc |
| EAS80514-1 | 5/9 Secondary reference U.S. Government activity |
NSN 4140-01-558-5546 is a Fan,centrifugal, manufactured by Twin City Fan Companies Ltd. Dba Tc Axial Div, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
NSN 4140-01-558-5546 has 1 manufacturer part number on file: BC196979-001 (Twin City Fan Companies Ltd. Dba Tc Axial Div).
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.