PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

922406C2Muffler,exhaust

Komatsu America Corp. · NSN 2990-00-441-7634 · FSC 2990 · No Item Name Available
Verified by PartsTable
NSN 2990-00-441-7634 — this item is cataloged by the U.S. Government under National Stock Number 2990-00-441-7634. Primary manufacturer part number: 922406C2.
Features
  • Muffler,exhaust — FSC 2990
  • Design Type: DRY
  • Baffle Quantity: 1
  • Overall Diameter: 12.120 INCHES NOMINAL IN
  • Inlet Connection Type: UNTHREADED SINGLE INLET
  • Muffler Design: STRAIGHT THROUGH W/BAFFLE
  • Outlet Connection Type: UNTHREADED FIRST OUTLET
  • Inlet Outside Diameter: 4.930 INCHES NOMINAL SINGLE INLET IN
Applications
  • Applications requiring Steel Location Not Otherwise Specified construction
General Description

The Muffler,exhaust, cataloged under National Stock Number 2990-00-441-7634, is classified within Federal Supply Class 2990 (No Item Name Available) of the Engine Accessories group. The primary manufacturer of record is Komatsu America Corp.. Government technical data includes 20 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 8 commercial cross-references from 7 manufacturers, 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
NSN2990-00-441-7634
Primary Part Number922406C2
Item NameMuffler,exhaust
FSC / FSG2990 / 29 — No Item Name Available
ManufacturerKomatsu America Corp.
StatusACTIVE
Design TypeDRY
Baffle Quantity1
Overall Diameter12.120 INCHES NOMINAL IN
Inlet Connection TypeUNTHREADED SINGLE INLET
Muffler DesignSTRAIGHT THROUGH W/BAFFLE
Outlet Connection TypeUNTHREADED FIRST OUTLET
Inlet Outside Diameter4.930 INCHES NOMINAL SINGLE INLET IN
Inlet Projection Length3.625 INCHES NOMINAL SINGLE INLET IN
Surface TreatmentCHROMIUM
Inlet Inside Diameter4.810 INCHES NOMINAL SINGLE INLET IN
Outlet LocationLOCATED CENTER OF END OF BODY
Outlet Projection Length13.800 INCHES NOMINAL FIRST OUTLET IN
MaterialSTEEL LOCATION NOT OTHERWISE SPECIFIED
Outlet Outside Diameter4.930 INCHES NOMINAL FIRST OUTLET IN
Inlet LocationLOCATED CENTER OF END OF BODY
Coolant TypeAIR
Operating PositionUNIVERSAL
Body ShapeROUND
Outlet Inside Diameter4.810 INCHES NOMINAL FIRST OUTLET IN
Tube Quantity1
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
3110-00-156-4699 INTERCHANGEABLE
Bearing,ball,annular
5330-00-350-9946 INTERCHANGEABLE
Seal,plain Encased
5950-00-448-0359 INTERCHANGEABLE
Reactor
5355-00-538-6387 INTERCHANGEABLE
Window,dial
6685-01-024-155911843 INTERCHANGEABLE
Control,temperature,indicating
Electro Impulse Laboratory Inc Dba Electro Impulse Inc
4220-01-171-3158 INTERCHANGEABLE
Toggle
6685-01-179-015411843 INTERCHANGEABLE
Hygrometer,dial Indicating
Munters Corporation Dba Munters Des Champs Products Div Cargocaire
7320-01-187-1534 INTERCHANGEABLE
Agitator,mixing Machine
4820-01-593-851911-843 INTERCHANGEABLE
Valve,safety Relief
Konrad Marine Inc Div Konrad Marine
5365-01-618-853011843 INTERCHANGEABLE
Spacer,special Shaped
Harley Davidson Motor Co Inc
Cross-Reference Index
Part NumberManufacturer
922406C2 Komatsu America Corp. (USA)
922406C2 Dressta North America Ltd (USA)
922406C2 Navistar Intl Corp Truck Br Ohio Plant (USA)
11843 Cummins Filtration Inc. (USA)
ABT11843 Ar Bee Corp (USA)
ABT11843 Brighton Cromwell Llc (USA)
T-11843 Cummins Filtration Inc. (USA)
922406C1 Navistar Intl Corp Melrose Park Engine Plant Location /melrose Park/ (USA)
Related Parts
3110-00-156-4699INTERCHANGEABLE
BEARING,BALL,ANNULAR
5330-00-350-9946INTERCHANGEABLE
SEAL,PLAIN ENCASED
5950-00-448-0359INTERCHANGEABLE
REACTOR
5355-00-538-6387INTERCHANGEABLE
WINDOW,DIAL
6685-01-024-1559INTERCHANGEABLE
CONTROL,TEMPERATURE,INDICATING
11843
4220-01-171-3158INTERCHANGEABLE
TOGGLE
6685-01-179-0154INTERCHANGEABLE
HYGROMETER,DIAL INDICATING
11843
7320-01-187-1534INTERCHANGEABLE
AGITATOR,MIXING MACHINE
4820-01-593-8519INTERCHANGEABLE
VALVE,SAFETY RELIEF
11-843
5365-01-618-8530INTERCHANGEABLE
SPACER,SPECIAL SHAPED
11843

Frequently Asked Questions

What is NSN 2990-00-441-7634?

NSN 2990-00-441-7634 is a Muffler,exhaust, manufactured by Komatsu America Corp., classified under FSC 2990 (No Item Name Available). Status: active.

What are the part numbers for NSN 2990-00-441-7634?

NSN 2990-00-441-7634 has 8 cross-referenced part numbers: 922406C2 (Komatsu America Corp.), 922406C2 (Dressta North America Ltd), 922406C2 (Navistar Intl Corp Truck Br Ohio Plant), 11843 (Cummins Filtration Inc.), ABT11843 (Ar Bee Corp) and 3 more.

What NSN replaces 2990-00-441-7634?

There are 10 known substitutes for 2990-00-441-7634: 3110-00-156-4699, 5330-00-350-9946, 5950-00-448-0359 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 922406C2?

Key specifications for 922406C2: Design Type: DRY; Baffle Quantity: 1; Overall Diameter: 12.120 INCHES NOMINAL IN; Inlet Connection Type: UNTHREADED SINGLE INLET. 21 total characteristics are documented in the Federal Logistics Information System.

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