The Fan,ventilating, cataloged under National Stock Number 4140-01-559-9750, 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 Naval Undersea Warfare Ctr. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4140-01-559-9750 |
| Primary Part Number | TSS/A4978-62012 |
| Item Name | Fan,ventilating |
| FSC / FSG | 4140 / 41 — Fans, Air Circulators, and Blower Equipment |
| Manufacturer | Naval Undersea Warfare Ctr |
| Status | ACTIVE |
| Criticality Code Justification | AGAV |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| A4978-86012 | Naval Undersea Warfare Ctr (USA) |
| TSS/A4978-62012 PRIMARY | Naval Undersea Warfare Ctr (USA) |
NSN 4140-01-559-9750 is a Fan,ventilating, manufactured by Naval Undersea Warfare Ctr, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
NSN 4140-01-559-9750 has 2 manufacturer part numbers on file: A4978-86012 (Naval Undersea Warfare Ctr), TSS/A4978-62012 (Naval Undersea Warfare Ctr).
Key specifications for TSS/A4978-62012: Criticality Code Justification: AGAV; Part Name Assigned by Controlling Agency: (INAVY)I/O COOLING FAN; End Item Identification: CP-2336(V)1A/BYQ-6(V), COMPUTER WORKSTATION/TRIDENT CW A. 1 specification is 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.