NSN 4140-01-249-4450 · NIIN 012494450 · Part number 2047K12
Mcmaster-Carr Supply Co · FSC 4140 — Fans, Air Circulators, and Blower Equipment · FSG 41 — Refrigeration, AC, and Air Circulating Equipment · CAGE 39428
Government record, cited
NSN 4140-01-249-4450 — this item is cataloged by the U.S. Government under National Stock Number 4140-01-249-4450. Manufacturer of record part number: 2047K12.
Also searched as4140-01-249-4450 ·
4140012494450 ·
NIIN 012494450 ·
01-249-4450 ·
FSC 4140 Fans, Air Circulators, and Blower Equipment · CAGE 39428 · 2047K12 · 1925K32
General Characteristics Item Description: 12 IN. SQUARE IN
1 manufacturer part number on file
Manufacturer of record: Mcmaster-Carr Supply Co
Identification
NSN: 4140-01-249-4450
NIIN: 012494450
FSC: 4140 — Fans, Air Circulators, and Blower Equipment
FSG: 41 — Refrigeration, AC, and Air Circulating Equipment
Primary part number: 2047K12
Manufacturer: Mcmaster-Carr Supply Co
General Description
The Damper,backdraft, cataloged under National Stock Number 4140-01-249-4450, 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 Mcmaster-Carr Supply Co. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4140-01-249-4450
Primary Part Number
2047K12
Item Name
Damper,backdraft
FSC / FSG
4140 / 41 — Fans, Air Circulators, and Blower Equipment
Other items in FSC 4140 — Fans, Air Circulators, and Blower Equipment
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4140-00-000-0082
IMPELLER,FAN,AXIAL
4140-00-001-1517
FAN,CENTRIFUGAL
4140-00-001-1536
FAN,VENTILATING
4140-00-001-1537
4140-00-001-1537 · Item name not on file
4140-00-001-3930
4140-00-001-3930 · Item name not on file
4140-00-001-6464
4140-00-001-6464 · Item name not on file
4140-00-001-6874
4140-00-001-6874 · Item name not on file
4140-00-001-6875
4140-00-001-6875 · Item name not on file
Frequently Asked Questions
What is NSN 4140-01-249-4450?
NSN 4140-01-249-4450 is a Damper,backdraft, manufactured by Mcmaster-Carr Supply Co, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
What part numbers are listed for NSN 4140-01-249-4450?
NSN 4140-01-249-4450 has 1 manufacturer part number on file: 2047K12 (Mcmaster-Carr Supply Co).
What are the specifications of 2047K12?
Key specifications for 2047K12: General Characteristics Item Description: 12 IN. SQUARE IN; End Item Identification: MCMASTER-CARR FAN P/N 1925K23 AND 1925K24. 1 specification is documented in the U.S. Government catalog.
Is NSN 4140-01-249-4450 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.