The Fan,tubeaxial, cataloged under National Stock Number 4140-01-418-0830, 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 Honeywell International, Inc Div Aerospace-Tucson. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 4140-01-418-0830 |
| Primary Part Number | 645737-1-1 |
| Item Name | Fan,tubeaxial |
| FSC / FSG | 4140 / 41 — Fans, Air Circulators, and Blower Equipment |
| Manufacturer | Honeywell International, Inc Div Aerospace-Tucson |
| 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 |
|---|---|
| 645737-1-1 PRIMARY | Honeywell International, Inc Div Aerospace-Tucson (USA) |
| Reference | Meaning |
|---|---|
| 901-325-103 | D/9 Drawing number reference only The Boeing Company |
| 901-325-103-113 | 7/2 Vendor item drawing reference The Boeing Company |
NSN 4140-01-418-0830 is a Fan,tubeaxial, manufactured by Honeywell International, Inc Div Aerospace-Tucson, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
NSN 4140-01-418-0830 has 1 manufacturer part number on file: 645737-1-1 (Honeywell International, Inc Div Aerospace-Tucson).
1 possible match (shared part number, not a government interchangeability claim): 1660-01-418-0831. Verify interchangeability with system specifications before substitution.
Key specifications for 645737-1-1: Part Name Assigned by Controlling Agency: RH AVIONICS BAY COOLING EXHAUST FAN; End Item Identification: V-22. 0 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.