PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

12-338Muffler,exhaust

Thermo King Corporation Dba Phoenix Global Distirbution. · NSN 2990-01-066-9273 · FSC 2990 · No Item Name Available
Verified by PartsTable
NSN 2990-01-066-9273 — this item is cataloged by the U.S. Government under National Stock Number 2990-01-066-9273. Primary manufacturer part number: 12-338.
Features
  • Muffler,exhaust — FSC 2990
  • Outlet Inside Diameter: 1.150 INCHES NOMINAL FIRST OUTLET IN
  • Overall Diameter: 5.000 INCHES NOMINAL IN
  • Body Shape: ROUND
  • Design Type: DRY
  • Outlet Projection Length: 5.500 INCHES NOMINAL FIRST OUTLET IN
  • Material: STEEL LOCATION NOT OTHERWISE SPECIFIED
  • Coolant Type: AIR
Applications
  • Applications requiring Steel Location Not Otherwise Specified construction
General Description

The Muffler,exhaust, cataloged under National Stock Number 2990-01-066-9273, is classified within Federal Supply Class 2990 (No Item Name Available) of the Engine Accessories group. The primary manufacturer of record is Thermo King Corporation Dba Phoenix Global Distirbution.. Government technical data includes 19 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN2990-01-066-9273
Primary Part Number12-338
Item NameMuffler,exhaust
FSC / FSG2990 / 29 — No Item Name Available
ManufacturerThermo King Corporation Dba Phoenix Global Distirbution.
StatusACTIVE
Outlet Inside Diameter1.150 INCHES NOMINAL FIRST OUTLET IN
Overall Diameter5.000 INCHES NOMINAL IN
Body ShapeROUND
Design TypeDRY
Outlet Projection Length5.500 INCHES NOMINAL FIRST OUTLET IN
MaterialSTEEL LOCATION NOT OTHERWISE SPECIFIED
Coolant TypeAIR
Inlet Outside Diameter1.250 INCHES NOMINAL SINGLE INLET IN
Tube Quantity1
Outlet Connection TypeUNTHREADED FIRST OUTLET
Outlet Outside Diameter1.250 INCHES NOMINAL FIRST OUTLET IN
Inlet Inside Diameter1.150 INCHES NOMINAL SINGLE INLET IN
Inlet Projection Length2.750 INCHES NOMINAL SINGLE INLET IN
Surface TreatmentPAINT
Inlet LocationLOCATED ON SIDE AT THE END
Outlet LocationOFFSET AT END OPPOSITE INLET
Muffler DesignSTRAIGHT THROUGH W/BAFFLE
Inlet Connection TypeUNTHREADED SINGLE INLET
Baffle Quantity1
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
5310-00-025-730912338 INTERCHANGEABLE
Washer,flat
Cae Usa Inc.
5970-00-073-1860123-0038 INTERCHANGEABLE
Insulator,bushing
Avionics Specialties, Inc.
6210-00-236-4024 INTERCHANGEABLE
Light,indicator
5950-00-461-9088 INTERCHANGEABLE
Transformer,audio Frequency
3040-01-142-7950 INTERCHANGEABLE
Splined Sleeve
5950-01-148-222912338 INTERCHANGEABLE
Transformer
Giga-Tronics Incorporated Dba Giga-Tronics
4730-01-171-7185SB NOZZLE--CRES INTERCHANGEABLE
Parts Kit,nozzle Web
Naval Ship Systems Command
4730-01-297-5274803-1385828PC6 INTERCHANGEABLE
Web,nozzle
Naval Ship Systems Command
2590-01-347-323212338 INTERCHANGEABLE
Bracket,vehicular Components
DP Manufacturing Inc.
5120-01-579-1012 INTERCHANGEABLE
Socket,socket Wrench
Cross-Reference Index
Part NumberManufacturer
12-338 PRIMARY Thermo King Corporation Dba Phoenix Global Distirbution. (USA)
Related Parts
5310-00-025-7309INTERCHANGEABLE
WASHER,FLAT
12338
5970-00-073-1860INTERCHANGEABLE
INSULATOR,BUSHING
123-0038
6210-00-236-4024INTERCHANGEABLE
LIGHT,INDICATOR
5950-00-461-9088INTERCHANGEABLE
TRANSFORMER,AUDIO FREQUENCY
3040-01-142-7950INTERCHANGEABLE
SPLINED SLEEVE
5950-01-148-2229INTERCHANGEABLE
TRANSFORMER
12338
4730-01-171-7185INTERCHANGEABLE
PARTS KIT,NOZZLE WEB
SB NOZZLE--CRES
4730-01-297-5274INTERCHANGEABLE
WEB,NOZZLE
803-1385828PC6
2590-01-347-3232INTERCHANGEABLE
BRACKET,VEHICULAR COMPONENTS
12338
5120-01-579-1012INTERCHANGEABLE
SOCKET,SOCKET WRENCH

Frequently Asked Questions

What is NSN 2990-01-066-9273?

NSN 2990-01-066-9273 is a Muffler,exhaust, manufactured by Thermo King Corporation Dba Phoenix Global Distirbution., classified under FSC 2990 (No Item Name Available). Status: active.

What are the part numbers for NSN 2990-01-066-9273?

NSN 2990-01-066-9273 has 1 cross-referenced part number: 12-338 (Thermo King Corporation Dba Phoenix Global Distirbution.).

What NSN replaces 2990-01-066-9273?

There are 10 known substitutes for 2990-01-066-9273: 5310-00-025-7309, 5970-00-073-1860, 6210-00-236-4024 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 12-338?

Key specifications for 12-338: Outlet Inside Diameter: 1.150 INCHES NOMINAL FIRST OUTLET IN; Overall Diameter: 5.000 INCHES NOMINAL IN; Body Shape: ROUND; Design Type: DRY. 21 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com