NSN 4520-01-231-3065 · NIIN 012313065 · Part number 7250-999 AY99 7X4
Huntington Ingalls Inc Div Newport News Shipbuilding · FSC 4520 — Space and Water Heating Equipment · FSG 45 — Plumbing, Heating, and Waste Disposal · CAGE 43689
Government record, cited
NSN 4520-01-231-3065 — this item is cataloged by the U.S. Government under National Stock Number 4520-01-231-3065. Manufacturer of record part number: 7250-999 AY99 7X4.
Also searched as4520-01-231-3065 ·
4520012313065 ·
NIIN 012313065 ·
01-231-3065 ·
FSC 4520 Space and Water Heating Equipment · CAGE 43689 · 7250-999 AY99 7X4 · 501-5003660 AY99 · 501-5003660 · 7250-999
Manufacturer of record: Huntington Ingalls Inc Div Newport News Shipbuilding
Identification
NSN: 4520-01-231-3065
NIIN: 012313065
FSC: 4520 — Space and Water Heating Equipment
FSG: 45 — Plumbing, Heating, and Waste Disposal
Primary part number: 7250-999 AY99 7X4
Manufacturer: Huntington Ingalls Inc Div Newport News Shipbuilding
General Description
The Damper,flue, cataloged under National Stock Number 4520-01-231-3065, 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 Huntington Ingalls Inc Div Newport News Shipbuilding. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4520-01-231-3065
Primary Part Number
7250-999 AY99 7X4
Item Name
Damper,flue
FSC / FSG
4520 / 45 — Space and Water Heating Equipment
Manufacturer
Huntington Ingalls Inc Div Newport News Shipbuilding
Status
ACTIVE
Shape
RECTANGULAR
Material
STEEL
Operation Method
AUTOMATIC
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
⇄Related Items5
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4520-01-231-30667250-999 AY99C 9X9IN.POSSIBLE MATCH
DAMPER,FLUE
Possible match (shared part number)Huntington Ingalls Inc Div Newport News Shipbuilding
4520-01-231-30677250-999 AY99D 10X10IN.POSSIBLE MATCH
DAMPER,FLUE
Possible match (shared part number)Huntington Ingalls Inc Div Newport News Shipbuilding
4520-01-231-61907250-999 AY99E 13X10IN.POSSIBLE MATCH
DAMPER,FLUE
Possible match (shared part number)Huntington Ingalls Inc Div Newport News Shipbuilding
4520-01-231-71547250-999 AY99F 11X11IN.POSSIBLE MATCH
DAMPER,FLUE
Possible match (shared part number)Huntington Ingalls Inc Div Newport News Shipbuilding
4520-01-231-71557250-999 AY99B 7X9IN.POSSIBLE MATCH
DAMPER,FLUE
Possible match (shared part number)Huntington Ingalls Inc Div Newport News Shipbuilding
Huntington Ingalls Inc Div Newport News Shipbuilding (USA)
Reference documents
Reference
Meaning
501-5003660 AY99
5/2Secondary reference
U.S. Government activity
501-5003660
D/9Drawing number reference only
U.S. Government activity
7250-999
D/9Drawing number reference only
Huntington Ingalls Inc Div Newport News Shipbuilding
Related Parts
4520-01-231-3066POSSIBLE MATCH
DAMPER,FLUE
7250-999 AY99C 9X9IN.
4520-01-231-3067POSSIBLE MATCH
DAMPER,FLUE
7250-999 AY99D 10X10IN.
4520-01-231-6190POSSIBLE MATCH
DAMPER,FLUE
7250-999 AY99E 13X10IN.
4520-01-231-7154POSSIBLE MATCH
DAMPER,FLUE
7250-999 AY99F 11X11IN.
4520-01-231-7155POSSIBLE MATCH
DAMPER,FLUE
7250-999 AY99B 7X9IN.
Frequently Asked Questions
What is NSN 4520-01-231-3065?
NSN 4520-01-231-3065 is a Damper,flue, manufactured by Huntington Ingalls Inc Div Newport News Shipbuilding, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
What part numbers are listed for NSN 4520-01-231-3065?
NSN 4520-01-231-3065 has 1 manufacturer part number on file: 7250-999 AY99 7X4 (Huntington Ingalls Inc Div Newport News Shipbuilding).
What NSN replaces 4520-01-231-3065?
5 possible matches (shared part number, not a government interchangeability claim): 4520-01-231-3066, 4520-01-231-3067, 4520-01-231-6190. Verify interchangeability with system specifications before substitution.
What are the specifications of 7250-999 AY99 7X4?
Key specifications for 7250-999 AY99 7X4: Shape: RECTANGULAR; Overall Length: 7.000 INCHES NOMINAL IN; Overall Width: 4.000 INCHES NOMINAL IN; End Item Identification: CARRIER,AIRCRAFT,NEWPORT NEWS SHIPBUILDING,CVN 70 SERIES. 3 specifications are documented in the U.S. Government catalog.
Is NSN 4520-01-231-3065 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.