The Exhaust Flapper,6, cataloged under National Stock Number 4140-01-486-0495, 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 Willard Marine, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Exhaust Flapper,6 |
| FSC / FSG | 4140 — Fans, Air Circulators, and Blower Equipment (FSG 41) |
| Manufacturers | Willard Marine, Inc. (CAGE 58367); West Marine Inc (CAGE 00XC0) |
| Parameter | Value |
|---|---|
| NSN | 4140-01-486-0495 |
| Primary Part Number | 13MPE-201-015,PC.76 |
| Item Name | Exhaust Flapper,6 |
| FSC / FSG | 4140 / 41 — Fans, Air Circulators, and Blower Equipment |
| Manufacturer | Willard Marine, 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 |
|---|---|
| 13MPE-201-015,PC.76 PRIMARY | Willard Marine, Inc. (USA) |
| 361996 | West Marine Inc (USA) |
| Reference | Meaning |
|---|---|
| 18-4458 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 4140-01-486-0495 is a Exhaust Flapper,6, manufactured by Willard Marine, Inc., classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
NSN 4140-01-486-0495 has 2 manufacturer part numbers on file: 13MPE-201-015,PC.76 (Willard Marine, Inc.), 361996 (West Marine Inc).
1 possible match (shared part number, not a government interchangeability claim): 2990-01-588-6228. Verify interchangeability with system specifications before substitution.
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.