The Vent Fan,key, cataloged under National Stock Number 4140-01-451-9834, 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 Louis Allis. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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.
| Parameter | Value |
|---|---|
| NSN | 4140-01-451-9834 |
| Primary Part Number | 08T00457-0009 |
| Item Name | Vent Fan,key |
| FSC / FSG | 4140 / 41 — Fans, Air Circulators, and Blower Equipment |
| Manufacturer | Louis Allis |
| 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 |
|---|---|
| 08T00457-0009 PRIMARY | Louis Allis (USA) |
| Reference | Meaning |
|---|---|
| 4140PL0655786 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 08T00457-0009 | 5/9 Secondary reference Louis Allis Co the This Company Has Gone Bankrupt and Has Been Purchased by 3 Companies |
| 08T00457-0009 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 4140-01-451-9834 is a Vent Fan,key, manufactured by Louis Allis, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
NSN 4140-01-451-9834 has 1 manufacturer part number on file: 08T00457-0009 (Louis Allis).
Key specifications for 08T00457-0009: Special Features: 11 BLADES, .500X.250 KEYWAY, SPLIT WITH 3/32 CUTTER 1.10 DEEP. MATERIAL-STEEL SPEC NO. QQ-S-630. 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.