2990-00-424-3391

Find complete technical information, availability, and procurement data for: 2990-00-424-3391
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Federal Supply Group

Engine Accessories

Federal Supply Classification

2990 Nonaircraft Miscellaneous Engine Accessories

National Stock Number

2990-00-424-3391

Item Name Code

10849

Assigment Date

01/01/1963 (63 years ago)

6.250 inches minimum and 6.500 inches maximum overall length, 3.625 inches nominal overall diameter, threaded single inlet inlet connection type, right-hand single inlet inlet thread direction, dry design type

Product Characteristics

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

Overall Length: 6.250 inches minimum and 6.500 inches maximum
Inlet Connection Type: threaded single inlet
Inlet Thread Direction: right-hand single inlet
Overall Diameter: 3.625 inches nominal
Design Type: dry
Coolant Type: air
Muffler Design: straight through
Body Shape: round
Inlet Location: centrally located in end section of body single inlet
Inlet Projection Length: 2.125 inches nominal single inlet2.125 inches nominal
Inlet Thread Size: 1-11-1/2 single inlet
Inlet Thread Series Designator: npt single inlet
Inlet Thread Location: external single inlet
Nonconnection Outlet Type And Quantity: 101 perforated
Nonconnection Outlet Location: located on end
Nonconnection Outlet Size: 5/64 in. dia
Material: steel location not otherwise specified
Surface Treatment: enamel
Fsc Application Data: gasoline engine,nonaircraft

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
2990-00-142-0296	No Name Available	01/05/1972
2990-00-294-2745	No Name Available	02/01/1976
2990-00-847-5384	No Name Available	11/22/1968

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
2212-5	Exhaust Muffler
290933	Exhaust Muffler
290933-3	Exhaust Muffler
69134	Exhaust Muffler
N5-290933	Exhaust Muffler

FAQs

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

What is the FSCG of the NSN 2990-00-424-3391?

The FSCG of the NSN 2990-00-424-3391 is 2990

Does the NSN 2990-00-424-3391 have a Schedule B code assigned?

Yes, the Schedule B code is 8708925000

Does NSN 2990-00-424-3391 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 2990-00-424-3391 contain precious materials?

Precious metal content is unknown

Does NSN 2990-00-424-3391 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 2990-00-424-3391 was assigned to the Federal Catalog?

It was assigned 63 years ago, on Tue, Jan 1, 1963