PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

IS1025Muffler,exhaust

Teck Exhaust Systems Inc · NSN 2990-00-041-2985 · FSC 2990 · No Item Name Available
Verified by PartsTable
NSN 2990-00-041-2985 — this item is cataloged by the U.S. Government under National Stock Number 2990-00-041-2985. Primary manufacturer part number: IS1025.
Features
  • Muffler,exhaust — FSC 2990
  • Muffler Design: BAFFLE
  • Outlet Inside Diameter: 2.000 INCHES NOMINAL FIRST OUTLET IN
  • Overall Diameter: 5.000 INCHES NOMINAL IN
  • Inlet Inside Diameter: 2.562 INCHES NOMINAL SINGLE INLET IN
  • Outlet Outside Diameter: 2.125 INCHES NOMINAL FIRST OUTLET IN
  • Inlet Location: CENTERED ON END OF BODY
  • Surface Treatment: PAINT
Applications
  • Applications requiring Steel Location Not Otherwise Specified construction
General Description

The Muffler,exhaust, cataloged under National Stock Number 2990-00-041-2985, is classified within Federal Supply Class 2990 (No Item Name Available) of the Engine Accessories group. The primary manufacturer of record is Teck Exhaust Systems Inc. Government technical data includes 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 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
NSN2990-00-041-2985
Primary Part NumberIS1025
Item NameMuffler,exhaust
FSC / FSG2990 / 29 — No Item Name Available
ManufacturerTeck Exhaust Systems Inc
StatusACTIVE
Muffler DesignBAFFLE
Outlet Inside Diameter2.000 INCHES NOMINAL FIRST OUTLET IN
Overall Diameter5.000 INCHES NOMINAL IN
Inlet Inside Diameter2.562 INCHES NOMINAL SINGLE INLET IN
Outlet Outside Diameter2.125 INCHES NOMINAL FIRST OUTLET IN
Inlet LocationCENTERED ON END OF BODY
Surface TreatmentPAINT
Coolant TypeAIR
Inlet Projection Length1.500 INCHES NOMINAL SINGLE INLET IN
Outlet LocationCENTERED ON END OF BODY
Inlet Outside Diameter2.625 INCHES NOMINAL SINGLE INLET IN
Design TypeDRY
Outlet Projection Length1.500 INCHES NOMINAL FIRST OUTLET IN
MaterialSTEEL LOCATION NOT OTHERWISE SPECIFIED
Baffle Quantity4
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
5910-00-112-73838A28546 INTERCHANGEABLE
Capacitor,fixed,paper Dielectric
General Dynamics Mission Systems, Inc. Dba Gdms
5330-00-135-9331 INTERCHANGEABLE
Seal,plain Encased
5136-00-197-95547244 INTERCHANGEABLE
Die,rethreading
Stanley Tools Div of Stanley Works
4310-00-377-8995204-118 INTERCHANGEABLE
Ring Set,piston
Dresser Industries Inc Leroi Div
4220-00-431-6517NS114128 INTERCHANGEABLE
Divers Compass,wris
Aqualung Usa, Inc
5940-01-007-20007244 INTERCHANGEABLE
Adapter,battery Terminal
Belden Wire and Cable Co Wire and Cable Office
4730-01-250-15667244 INTERCHANGEABLE
Elbow,pipe
Mitsubishi Caterpillar Forklift America, Inc
5315-01-501-8565136792 INTERCHANGEABLE
Pin,quick Release
Cadillac Gage Textron Inc.
5925-01-565-0428 INTERCHANGEABLE
Circuit Breaker
5340-01-665-96147244 INTERCHANGEABLE
Standoff,threaded,spacing
Keystone Electronics Corp
Cross-Reference Index
Part NumberManufacturer
IS1025 Teck Exhaust Systems Inc (USA)
7244 Finn Corp Dba Finn Corp (USA)
Related Parts
5910-00-112-7383INTERCHANGEABLE
CAPACITOR,FIXED,PAPER DIELECTRIC
8A28546
5330-00-135-9331INTERCHANGEABLE
SEAL,PLAIN ENCASED
5136-00-197-9554INTERCHANGEABLE
DIE,RETHREADING
7244
4310-00-377-8995INTERCHANGEABLE
RING SET,PISTON
204-118
4220-00-431-6517INTERCHANGEABLE
DIVERS COMPASS,WRIS
NS114128
5940-01-007-2000INTERCHANGEABLE
ADAPTER,BATTERY TERMINAL
7244
4730-01-250-1566INTERCHANGEABLE
ELBOW,PIPE
7244
5315-01-501-8565INTERCHANGEABLE
PIN,QUICK RELEASE
136792
5925-01-565-0428INTERCHANGEABLE
CIRCUIT BREAKER
5340-01-665-9614INTERCHANGEABLE
STANDOFF,THREADED,SPACING
7244

Frequently Asked Questions

What is NSN 2990-00-041-2985?

NSN 2990-00-041-2985 is a Muffler,exhaust, manufactured by Teck Exhaust Systems Inc, classified under FSC 2990 (No Item Name Available). Status: active.

What are the part numbers for NSN 2990-00-041-2985?

NSN 2990-00-041-2985 has 2 cross-referenced part numbers: IS1025 (Teck Exhaust Systems Inc), 7244 (Finn Corp Dba Finn Corp).

What NSN replaces 2990-00-041-2985?

There are 10 known substitutes for 2990-00-041-2985: 5910-00-112-7383, 5330-00-135-9331, 5136-00-197-9554 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of IS1025?

Key specifications for IS1025: Muffler Design: BAFFLE; Outlet Inside Diameter: 2.000 INCHES NOMINAL FIRST OUTLET IN; Overall Diameter: 5.000 INCHES NOMINAL IN; Inlet Inside Diameter: 2.562 INCHES NOMINAL SINGLE INLET IN. 16 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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