The Fan,circulating, cataloged under National Stock Number 4140-01-396-7521, 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 Technical Services Laboratory, Inc. Dba Technical Services Laboratory 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Fan,circulating |
| FSC / FSG | 4140 — Fans, Air Circulators, and Blower Equipment (FSG 41) |
| Manufacturers | Technical Services Laboratory, Inc. Dba Technical Services Laboratory Inc (CAGE 51283); Muirhead Aerospace Ltd (CAGE K0624) |
| Parameter | Value |
|---|---|
| NSN | 4140-01-396-7521 |
| Primary Part Number | 9SD2104-001 |
| Item Name | Fan,circulating |
| FSC / FSG | 4140 / 41 — Fans, Air Circulators, and Blower Equipment |
| Manufacturer | Technical Services Laboratory, Inc. Dba Technical Services Laboratory 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 |
|---|---|
| 9SD2104-001 PRIMARY | Technical Services Laboratory, Inc. Dba Technical Services Laboratory Inc (USA) |
| 92D2104 | Muirhead Aerospace Ltd (GBR) |
| Reference | Meaning |
|---|---|
| 9SD2104-001 | 5/9 Secondary reference Reico Inc |
| 92D2104 | 5/9 Secondary reference Muirhead Aerospace Ltd Avionics Divison Penge |
| 92D2104 | 5/9 Secondary reference Reico Inc |
NSN 4140-01-396-7521 is a Fan,circulating, manufactured by Technical Services Laboratory, Inc. Dba Technical Services Laboratory Inc, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
NSN 4140-01-396-7521 has 2 manufacturer part numbers on file: 9SD2104-001 (Technical Services Laboratory, Inc. Dba Technical Services Laboratory Inc), 92D2104 (Muirhead Aerospace Ltd).
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.