The Cover,ventilatory, cataloged under National Stock Number 4140-01-390-3333, 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 Tech-Etch, Inc. Dba Tech-Etch Inc. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4140-01-390-3333 |
| Primary Part Number | C-3743 |
| Item Name | Cover,ventilatory |
| FSC / FSG | 4140 / 41 — Fans, Air Circulators, and Blower Equipment |
| Manufacturer | Tech-Etch, Inc. Dba Tech-Etch Inc |
| 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 |
NSN 4140-01-390-3333 is a Cover,ventilatory, manufactured by Tech-Etch, Inc. Dba Tech-Etch Inc, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
NSN 4140-01-390-3333 has 2 manufacturer part numbers on file: C-3743 (Tech-Etch, Inc. Dba Tech-Etch Inc), C-3743 SK (L3 Technologies, Inc.).
Key specifications for C-3743: Special Features: ALUMINUM ALLOY; 11.250 IN. LG; 3.250 IN. W; 0.625 IN. H IN; End Item Identification: LOS ANGELES CLASS SSN (688). 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.