NSN 4520-01-521-5779 · NIIN 015215779 · Part number 2051AS149-01
Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier · FSC 4520 — Space and Water Heating Equipment · FSG 45 — Plumbing, Heating, and Waste Disposal · CAGE 30003
Government record, cited
NSN 4520-01-521-5779 — this item is cataloged by the U.S. Government under National Stock Number 4520-01-521-5779. Manufacturer of record part number: 2051AS149-01.
Also searched as4520-01-521-5779 ·
4520015215779 ·
NIIN 015215779 ·
01-521-5779 ·
FSC 4520 Space and Water Heating Equipment · CAGE 30003 · 2051AS149-01
Nearby stock numbers← 4520-01-521-5346 Heater, Water, Electric
·
4520-01-521-8049 Hot Pad Heater →
Features
Terminal,ventilation Duct — FSC 4520
Style Designator: STRAIGHT
Damper: NOT INCLUDED
Material: ALUMINUM ALLOY
1 manufacturer part number on file
Manufacturer of record: Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier
Identification
NSN: 4520-01-521-5779
NIIN: 015215779
FSC: 4520 — Space and Water Heating Equipment
FSG: 45 — Plumbing, Heating, and Waste Disposal
Primary part number: 2051AS149-01
Manufacturer: Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier
General Description
The Terminal,ventilation Duct, cataloged under National Stock Number 4520-01-521-5779, is classified within Federal Supply Class 4520 (Space and Water Heating Equipment) of the Plumbing, Heating, and Waste Disposal group. The manufacturer of record is Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. Government technical data includes 3 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. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4520-01-521-5779
Primary Part Number
2051AS149-01
Item Name
Terminal,ventilation Duct
FSC / FSG
4520 / 45 — Space and Water Heating Equipment
Manufacturer
Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier
Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA)
No interchangeability data on file.
Other items in FSC 4520 — Space and Water Heating Equipment
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4520-00-000-0098
HEATING ELEMENT,ELECTRICAL,NONIM
4520-00-000-0099
4520-00-000-0099 · Item name not on file
4520-00-001-1240
4520-00-001-1240 · Item name not on file
4520-00-001-3518
HEATING ELEMENT,ELECTRICAL,NONIM
4520-00-001-3519
HEATING ELEMENT,ELECTRICAL,IMMER
4520-00-001-6052
HEATING ELEMENT,ELECTRICAL,NONIM
4520-00-001-6298
HEATING ELEMENT,ELECTRICAL,NONIM
4520-00-001-7726
HEATER,DUCT TYPE,PORTABLE
Frequently Asked Questions
What is NSN 4520-01-521-5779?
NSN 4520-01-521-5779 is a Terminal,ventilation Duct, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
What part numbers are listed for NSN 4520-01-521-5779?
NSN 4520-01-521-5779 has 1 manufacturer part number on file: 2051AS149-01 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier).
What are the specifications of 2051AS149-01?
Key specifications for 2051AS149-01: Overall Height: 20.750 INCHES NOMINAL IN; Style Designator: STRAIGHT; Overall Width: 21.500 INCHES NOMINAL IN; Damper: NOT INCLUDED. 3 specifications are documented in the U.S. Government catalog.
Is NSN 4520-01-521-5779 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.