The Fan Assembly,tubeaxial, cataloged under National Stock Number 4140-01-657-6951, 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 Lockheed Martin Services, Llc. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 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 | 4140-01-657-6951 |
| Primary Part Number | C3850-FAN-T1= |
| Item Name | Fan Assembly,tubeaxial |
| FSC / FSG | 4140 / 41 — Fans, Air Circulators, and Blower Equipment |
| Manufacturer | Lockheed Martin Services, Llc |
| 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 |
|---|---|
| C3850-FAN-T1= PRIMARY | Lockheed Martin Services, Llc (USA) |
NSN 4140-01-657-6951 is a Fan Assembly,tubeaxial, manufactured by Lockheed Martin Services, Llc, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
NSN 4140-01-657-6951 has 1 manufacturer part number on file: C3850-FAN-T1= (Lockheed Martin Services, Llc).
1 possible match (shared part number, not a government interchangeability claim): 4140-01-684-2451. Verify interchangeability with system specifications before substitution.
Key specifications for C3850-FAN-T1=: Special Features: FAN MODULE, TYPE 1, 3850 SWITCH; End Item Identification: ENROUTE AUTOMATION MODERNIZATION (ERAM). 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.