The Impeller,fan,axial, cataloged under National Stock Number 4140-01-451-9751, 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 Cospolich Inc.. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Impeller,fan,axial |
| FSC / FSG | 4140 — Fans, Air Circulators, and Blower Equipment (FSG 41) |
| Manufacturers | Emerson Climate Technologies, Inc. Dba Design Services Network (CAGE 5L3D4); Cospolich Inc. (CAGE 66682) |
| Parameter | Value |
|---|---|
| NSN | 4140-01-451-9751 |
| Primary Part Number | RWFB18 |
| Item Name | Impeller,fan,axial |
| FSC / FSG | 4140 / 41 — Fans, Air Circulators, and Blower Equipment |
| Manufacturer | Cospolich Inc. |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 983-0160-00 | Emerson Climate Technologies, Inc. Dba Design Services Network (USA) |
| RWFB18 PRIMARY | Cospolich Inc. (USA) |
| Reference | Meaning |
|---|---|
| 2L53 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 083-0102-00 | 5/9 Secondary reference Copeland Corp |
| 083-0102-00 | 5/9 Secondary reference Emerson Climate Technologies, Inc. Dba Design Services Network |
NSN 4140-01-451-9751 is a Impeller,fan,axial, manufactured by Cospolich Inc., classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
NSN 4140-01-451-9751 has 2 manufacturer part numbers on file: 983-0160-00 (Emerson Climate Technologies, Inc. Dba Design Services Network), RWFB18 (Cospolich Inc.).
1 possible match (shared part number, not a government interchangeability claim): 4140-01-451-9754. Verify interchangeability with system specifications before substitution.
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.