2990-00-984-4973

Find complete technical information, availability, and procurement data for: 2990-00-984-4973
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Federal Supply Group

Engine Accessories

Federal Supply Classification

2990 Nonaircraft Miscellaneous Engine Accessories

National Stock Number

2990-00-984-4973

Item Name Code

10849

Assigment Date

10/21/1966 (59 years ago)

unthreaded single inlet inlet connection type, dry design type, 3.500 inches nominal 1st outlet3.500 inches nominal outlet inside diameter, 13.125 inches nominal overall length, 8.500 inches nominal overall diameter

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Overall Length: 13.125 inches nominal
Inlet Connection Type: unthreaded single inlet
Overall Diameter: 8.500 inches nominal
Outlet Inside Diameter: 3.500 inches nominal 1st outlet3.500 inches nominal
Design Type: dry
Muffler Design: straight through
Baffle Quantity: 1
Tube Quantity: 1
Body Shape: round
Operating Position: horizontal
Inlet Location: centrally located in end section of body single inlet
Inlet Projection Length: 1.906 inches nominal single inlet1.906 inches nominal
Inlet Outside Diameter: 3.656 inches minimum and 3.688 inches maximum single inlet
Inlet Inside Diameter: 3.531 inches minimum and 3.563 inches maximum single inlet
Outlet Connection Type: unthreaded 1st outlet
Outlet Location: centrally located in end section of body 1st outlet
Outlet Projection Length: 3.969 inches nominal 1st outlet3.969 inches nominal
Outlet Outside Diameter: 3.625 inches nominal 1st outlet3.625 inches nominal
Outlet Integral Tail Pipe Length: 16.313 inches minimum and 16.688 inches maximum 1st outlet
Material: steel location not otherwise specified
Surface Treatment: aluminum
Fsc Application Data: engine exhaust system,nonaircraft

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
2990-00-848-1603	No Name Available	03/24/1969

Related Parts

This NSN group includes multiple components designed to meet specific performance and operational standards. Each listing provides detailed specs, functionality data, and replacement compatibility information:

Part Number	Name
121054	Exhaust Muffler
404967	Exhaust Muffler
8912	Exhaust Muffler
ABT8912	Exhaust Muffler
T-8912	Exhaust Muffler

FAQs

Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.

What is the FSCG of the NSN 2990-00-984-4973?

The FSCG of the NSN 2990-00-984-4973 is 2990

Does the NSN 2990-00-984-4973 have a Schedule B code assigned?

Yes, the Schedule B code is 8708925000

Does NSN 2990-00-984-4973 require demilitarization?

Items subject to the export administration regulations (ear) in parts 730-774 of title 15, code of federal regulations (cfr) (ccli or ear99) and determined by dod to present a low risk when released out of dod control. No demil, mut, or end use certificate is required. May require an export licensefrom doc.

Does NSN 2990-00-984-4973 contain precious materials?

Precious metal content is unknown

Does NSN 2990-00-984-4973 contain hazardous materials?

Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

When the NSN 2990-00-984-4973 was assigned to the Federal Catalog?

It was assigned 59 years ago, on Fri, Oct 21, 1966