The Fan,ventilating, cataloged under National Stock Number 4140-01-659-3450, 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 Broan-Nutone Llc Dba Broan. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4140-01-659-3450 |
| Primary Part Number | L500 |
| Item Name | Fan,ventilating |
| FSC / FSG | 4140 / 41 — Fans, Air Circulators, and Blower Equipment |
| Manufacturer | Broan-Nutone Llc Dba Broan |
| Status | ACTIVE |
| Inclosure Type | FULLY INCLOSED |
| Length | 12.25 INCHES NOMINAL IN |
| Height | 11.75 INCHES NOMINAL IN |
| Width | 21.50 INCHES NOMINAL IN |
| Material | STEEL HOUSING |
| 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 |
|---|---|
| L500 PRIMARY | Broan-Nutone Llc Dba Broan (USA) |
NSN 4140-01-659-3450 is a Fan,ventilating, manufactured by Broan-Nutone Llc Dba Broan, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
NSN 4140-01-659-3450 has 1 manufacturer part number on file: L500 (Broan-Nutone Llc Dba Broan).
2 possible matches (shared part number, not a government interchangeability claim): 5310-01-661-8115, 6650-01-695-1542. Verify interchangeability with system specifications before substitution.
Key specifications for L500: Inclosure Type: FULLY INCLOSED; Length: 12.25 INCHES NOMINAL IN; Height: 11.75 INCHES NOMINAL IN; Width: 21.50 INCHES NOMINAL IN. 5 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.