PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

90505Diffuser,air,aircraft Heating an

Mestek Inc. Dba Anemostat, a Mestek Company · NSN 1660-00-674-4451 · FSC 1660 · No Item Name Available
Verified by PartsTable
NSN 1660-00-674-4451 — this item is cataloged by the U.S. Government under National Stock Number 1660-00-674-4451. Primary manufacturer part number: 90505.
Features
  • Diffuser,air,aircraft Heating an — FSC 1660
  • 1 verified cross-reference
  • Primary manufacturer: Mestek Inc. Dba Anemostat, a Mestek Company
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Diffuser,air,aircraft Heating an, cataloged under National Stock Number 1660-00-674-4451, is classified within Federal Supply Class 1660 (No Item Name Available) of the Aircraft Components and Accessories group. The primary manufacturer of record is Mestek Inc. Dba Anemostat, a Mestek Company. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameDiffuser,air,aircraft Heating an
FSC / FSG1660 — No Item Name Available (FSG 16)
ManufacturersMestek Inc. Dba Anemostat, a Mestek Company (CAGE 03496)
Technical Specifications
ParameterValue
NSN1660-00-674-4451
Primary Part Number90505
Item NameDiffuser,air,aircraft Heating an
FSC / FSG1660 / 16 — No Item Name Available
ManufacturerMestek Inc. Dba Anemostat, a Mestek Company
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
5815-00-126-793190505 INTERCHANGEABLE
Lever
Telemechanics Inc
4820-00-618-9064TI 1/2 FC INTERCHANGEABLE
Valve,expansion
Emerson Electric Co Alco Controls Div
5999-00-985-082232-262 INTERCHANGEABLE
Shielding Gasket,electronic
Parker-Hannifin Corporation Dba Pneutronics Div Chomerics Division
6105-01-103-29599050-5 INTERCHANGEABLE
Motor
Testek Llc Dba Testek Solutions
5305-01-154-5847100A905056 INTERCHANGEABLE
Screw
Northrop Grumman Systems Corporation
4920-01-297-973690505 INTERCHANGEABLE
Test Program Set
Textron Systems Corporation Dba Textron Systems Corp
5315-01-470-590790505 INTERCHANGEABLE
Pin,straight,headed
Air Techniques, Inc.
6230-01-666-293690505 INTERCHANGEABLE
Flashlight
Streamlight Inc Dba Streamlight Inc
Cross-Reference Index
Part NumberManufacturer
90505 Mestek Inc. Dba Anemostat, a Mestek Company (USA)
Related Parts
5815-00-126-7931INTERCHANGEABLE
LEVER
90505
4820-00-618-9064INTERCHANGEABLE
VALVE,EXPANSION
TI 1/2 FC
5999-00-985-0822INTERCHANGEABLE
SHIELDING GASKET,ELECTRONIC
32-262
6105-01-103-2959INTERCHANGEABLE
MOTOR
9050-5
5305-01-154-5847INTERCHANGEABLE
SCREW
100A905056
4920-01-297-9736INTERCHANGEABLE
TEST PROGRAM SET
90505
5315-01-470-5907INTERCHANGEABLE
PIN,STRAIGHT,HEADED
90505
6230-01-666-2936INTERCHANGEABLE
FLASHLIGHT
90505

Frequently Asked Questions

What is NSN 1660-00-674-4451?

NSN 1660-00-674-4451 is a Diffuser,air,aircraft Heating an, manufactured by Mestek Inc. Dba Anemostat, a Mestek Company, classified under FSC 1660 (No Item Name Available). Status: active.

What are the part numbers for NSN 1660-00-674-4451?

NSN 1660-00-674-4451 has 1 cross-referenced part number: 90505 (Mestek Inc. Dba Anemostat, a Mestek Company).

What NSN replaces 1660-00-674-4451?

There are 8 known substitutes for 1660-00-674-4451: 5815-00-126-7931, 4820-00-618-9064, 5999-00-985-0822 and 5 more. Verify interchangeability with system specifications before substitution.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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