PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

7S8443Muffler,exhaust

Caterpillar Inc Div Caterpillar Defense · NSN 2990-00-126-2334 · FSC 2990 · No Item Name Available
Verified by PartsTable
NSN 2990-00-126-2334 — this item is cataloged by the U.S. Government under National Stock Number 2990-00-126-2334. Primary manufacturer part number: 7S8443.
Features
  • Muffler,exhaust — FSC 2990
  • Coolant Type: AIR
  • Outlet Projection Length: 4.219 INCHES NOMINAL FIRST OUTLET IN
  • Material: STEEL LOCATION NOT OTHERWISE SPECIFIED
  • Design Type: DRY
  • Outlet Location: CENTRALLY LOCATED ON END OF BODY
  • Outlet Inside Diameter: 4.500 INCHES NOMINAL FIRST OUTLET IN
  • Inlet Inside Diameter: 4.375 INCHES NOMINAL SINGLE INLET IN
Applications
  • Applications requiring Steel Location Not Otherwise Specified construction
General Description

The Muffler,exhaust, cataloged under National Stock Number 2990-00-126-2334, is classified within Federal Supply Class 2990 (No Item Name Available) of the Engine Accessories group. The primary manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 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
NSN2990-00-126-2334
Primary Part Number7S8443
Item NameMuffler,exhaust
FSC / FSG2990 / 29 — No Item Name Available
ManufacturerCaterpillar Inc Div Caterpillar Defense
StatusACTIVE
Coolant TypeAIR
Outlet Projection Length4.219 INCHES NOMINAL FIRST OUTLET IN
MaterialSTEEL LOCATION NOT OTHERWISE SPECIFIED
Design TypeDRY
Outlet LocationCENTRALLY LOCATED ON END OF BODY
Outlet Inside Diameter4.500 INCHES NOMINAL FIRST OUTLET IN
Inlet Inside Diameter4.375 INCHES NOMINAL SINGLE INLET IN
Inlet Projection Length1.594 INCHES NOMINAL SINGLE INLET IN
Muffler DesignSTRAIGHT THROUGH
Tube Quantity1
Inlet LocationCENTRALLY LOCATED ON END OF BODY
Overall Diameter8.000 INCHES NOMINAL IN
Operating PositionUNIVERSAL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
4820-00-009-93578000-2 INTERCHANGEABLE
Valve,check
Bahr Machine Company Inc Dba Bahr Machine Co
6625-01-170-2061628-19867 INTERCHANGEABLE
Meter,null
Phaostron Instrument and Electronic Company
5340-01-188-73958000-2 INTERCHANGEABLE
Fastener,pawl
Eastern Co Div Eberhard Manufacturing
2090-01-324-1964733537-1 INTERCHANGEABLE
Accumulator,hydraulic
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
6150-01-328-0277800-02 INTERCHANGEABLE
Cable Assembly,special Purpose,e
Lite-Check, Llc
5895-01-341-167380002 INTERCHANGEABLE
Case,electronic Communications E
Motorola/codex Corp Sub of Motorola Inc
4820-01-446-408580002 INTERCHANGEABLE
Valve,ball
Dunns Valve Testers Inc
6230-01-513-255180002 INTERCHANGEABLE
Traffic Cone,illumination
The Arc of Bergen and Passaic Counties Inc
5985-01-575-5636 INTERCHANGEABLE
Base,antenna Support
3431-01-722-321480002 INTERCHANGEABLE
Welding Machine,arc
Caterpillar Inc Div Caterpillar Defense
Cross-Reference Index
Part NumberManufacturer
IPD7S8443 Industrial Parts Depot, Llc Dba Ipd (USA)
7S8443 PRIMARY Caterpillar Inc Div Caterpillar Defense (USA)
80002 Riker Products (USA)
80002 PRIMARY Riker Products Inc (USA)
Related Parts
4820-00-009-9357INTERCHANGEABLE
VALVE,CHECK
8000-2
6625-01-170-2061INTERCHANGEABLE
METER,NULL
628-19867
5340-01-188-7395INTERCHANGEABLE
FASTENER,PAWL
8000-2
2090-01-324-1964INTERCHANGEABLE
ACCUMULATOR,HYDRAULIC
733537-1
6150-01-328-0277INTERCHANGEABLE
CABLE ASSEMBLY,SPECIAL PURPOSE,E
800-02
5895-01-341-1673INTERCHANGEABLE
CASE,ELECTRONIC COMMUNICATIONS E
80002
4820-01-446-4085INTERCHANGEABLE
VALVE,BALL
80002
6230-01-513-2551INTERCHANGEABLE
TRAFFIC CONE,ILLUMINATION
80002
5985-01-575-5636INTERCHANGEABLE
BASE,ANTENNA SUPPORT
3431-01-722-3214INTERCHANGEABLE
WELDING MACHINE,ARC
80002

Frequently Asked Questions

What is NSN 2990-00-126-2334?

NSN 2990-00-126-2334 is a Muffler,exhaust, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 2990 (No Item Name Available). Status: active.

What are the part numbers for NSN 2990-00-126-2334?

NSN 2990-00-126-2334 has 4 cross-referenced part numbers: IPD7S8443 (Industrial Parts Depot, Llc Dba Ipd), 7S8443 (Caterpillar Inc Div Caterpillar Defense), 80002 (Riker Products), 80002 (Riker Products Inc).

What NSN replaces 2990-00-126-2334?

There are 10 known substitutes for 2990-00-126-2334: 4820-00-009-9357, 6625-01-170-2061, 5340-01-188-7395 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 7S8443?

Key specifications for 7S8443: Coolant Type: AIR; Outlet Projection Length: 4.219 INCHES NOMINAL FIRST OUTLET IN; Material: STEEL LOCATION NOT OTHERWISE SPECIFIED; Design Type: DRY. 14 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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