2990-00-981-4929

Find complete technical information, availability, and procurement data for: 2990-00-981-4929
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Federal Supply Group

Engine Accessories

Federal Supply Classification

2990 Nonaircraft Miscellaneous Engine Accessories

National Stock Number

2990-00-981-4929

Item Name Code

10849

Assigment Date

01/01/1963 (63 years ago)

Excludes:parts kit, electrical contact brush holder and brush set, electrical contact.

4.375 inches nominal overall diameter, dry design type, 8.438 inches nominal overall length, unthreaded single inlet inlet connection type, 0.880 inches nominal 1st outlet0.880 inches nominal outlet inside 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: 8.438 inches nominal
Inlet Connection Type: unthreaded single inlet
Overall Diameter: 4.375 inches nominal
Outlet Inside Diameter: 0.880 inches nominal 1st outlet0.880 inches nominal
Design Type: dry
Coolant Type: air
Muffler Design: baffle
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: 0.750 inches nominal single inlet0.750 inches nominal
Inlet Outside Diameter: 1.000 inches nominal single inlet1.000 inches nominal
Inlet Inside Diameter: 0.880 inches nominal single inlet0.880 inches nominal
Outlet Connection Type: unthreaded 1st outlet
Outlet Location: on od of body 1-1/2 in. from top 1st outlet
Outlet Projection Length: 0.750 inches nominal 1st outlet0.750 inches nominal
Outlet Outside Diameter: 1.000 inches nominal 1st outlet1.000 inches nominal
Material: steel location not otherwise specified
Surface Treatment: aluminum
Fsc Application Data: exhaust system,engine,nonaircraft

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
10919324	Exhaust Muffler
2990009814929	Exhaust Muffler

FAQs

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

What is the FSCG of the NSN 2990-00-981-4929?

The FSCG of the NSN 2990-00-981-4929 is 2990

Does the NSN 2990-00-981-4929 have a Schedule B code assigned?

Yes, the Schedule B code is 8708925000

Does NSN 2990-00-981-4929 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 2990-00-981-4929 contain precious materials?

Precious metal content is unknown

Does NSN 2990-00-981-4929 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 2990-00-981-4929 was assigned to the Federal Catalog?

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