PartsTable TECHNICAL DATA SHEET

NSN 2990-00-075-0113Government record, cited

Muffler, Exhaust2990-00-075-0113

NSN 2990-00-075-0113 · NIIN 000750113 · Part number T6550

Cummins Filtration Inc. · FSC 2990 — Miscellaneous Engine Accessories, Nonaircraft · FSG 29 — Engine Accessories · CAGE 76700

Government record, cited

NSN 2990-00-075-0113 — this item is cataloged by the U.S. Government under National Stock Number 2990-00-075-0113. Manufacturer of record part number: T6550.

Also searched as 2990-00-075-0113 · 2990000750113 · NIIN 000750113 · 00-075-0113 · FSC 2990 Miscellaneous Engine Accessories, Nonaircraft · CAGE 76700 · T6550 · 74756205 · ABT6550 · ABT6550

Nearby stock numbers ← 2990-00-074-3579 Governor, Load Sensi · 2990-00-075-0115 Pipe, Exhaust →

Features

Muffler,exhaust — FSC 2990
Operating Position: UNIVERSAL
Inlet Location: OFF-CENTER ON END OF BODY
Coolant Type: AIR
Design Type: DRY
Overall Diameter: 5.620 INCHES NOMINAL IN
Outlet Inside Diameter: 1.495 INCHES NOMINAL FIRST OUTLET IN
Inlet Projection Length: 1.375 INCHES NOMINAL SINGLE INLET IN

Identification

NSN: 2990-00-075-0113
NIIN: 000750113
FSC: 2990 — Miscellaneous Engine Accessories, Nonaircraft
FSG: 29 — Engine Accessories
Primary part number: T6550
Manufacturer: Cummins Filtration Inc.

General Description

The Muffler,exhaust, cataloged under National Stock Number 2990-00-075-0113, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Cummins Filtration Inc.. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	2990-00-075-0113
Primary Part Number	T6550
Item Name	Muffler,exhaust
FSC / FSG	2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft
Manufacturer	Cummins Filtration Inc.
Status	ACTIVE
Operating Position	UNIVERSAL
Inlet Location	OFF-CENTER ON END OF BODY
Coolant Type	AIR
Design Type	DRY
Overall Diameter	5.620 INCHES NOMINAL IN
Outlet Inside Diameter	1.495 INCHES NOMINAL FIRST OUTLET IN
Inlet Projection Length	1.375 INCHES NOMINAL SINGLE INLET IN
Baffle Quantity	1
Muffler Design	STRAIGHT THROUGH W/BAFFLE
Inlet Inside Diameter	1.790 INCHES NOMINAL SINGLE INLET IN
Material	STEEL LOCATION NOT OTHERWISE SPECIFIED
Outlet Projection Length	1.375 INCHES NOMINAL FIRST OUTLET IN
Outlet Location	OFF-CENTER ON END OF BODY

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL A — No Demilitarization Required
Hazard	No hazard code in the DLA record (HMIC N)
Criticality Code	X

Cross-Reference Index

Part Number	Manufacturer
74756205	Kalmar AC Inc (USA)
ABT6550	Brighton Cromwell Llc (USA)
T6550 PRIMARY	Cummins Filtration Inc. (USA)

Reference documents

Reference	Meaning
ABT6550	5/9 Secondary reference Ar Bee Corp

No interchangeability data on file.

Other items in FSC 2990 — Miscellaneous Engine Accessories, Nonaircraft

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

2990-00-001-0001

BLOWER ASSEMBLY

2990-00-001-1248

2990-00-001-1248 · Item name not on file

2990-00-001-1250

2990-00-001-1250 · Item name not on file

2990-00-001-2055

2990-00-001-2055 · Item name not on file

2990-00-001-3498

2990-00-001-3498 · Item name not on file

2990-00-001-3520

2990-00-001-3520 · Item name not on file

2990-00-001-3521

2990-00-001-3521 · Item name not on file

2990-00-001-3522

CAP ASSEMBLY,MUFFLE

Frequently Asked Questions

What is NSN 2990-00-075-0113?

NSN 2990-00-075-0113 is a Muffler,exhaust, manufactured by Cummins Filtration Inc., classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.

What part numbers are listed for NSN 2990-00-075-0113?

NSN 2990-00-075-0113 has 3 manufacturer part numbers on file: 74756205 (Kalmar AC Inc), ABT6550 (Brighton Cromwell Llc), T6550 (Cummins Filtration Inc.).

What are the specifications of T6550?

Key specifications for T6550: Operating Position: UNIVERSAL; Inlet Location: OFF-CENTER ON END OF BODY; Coolant Type: AIR; Design Type: DRY. 13 specifications are documented in the U.S. Government catalog.

Is NSN 2990-00-075-0113 hazardous material?

No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.

Sources

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.

✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.

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