2990-00-971-5694

Find complete technical information, availability, and procurement data for: 2990-00-971-5694
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Federal Supply Group

Engine Accessories

Federal Supply Classification

2990 Nonaircraft Miscellaneous Engine Accessories

National Stock Number

2990-00-971-5694

Item Name Code

10849

Assigment Date

09/28/1966 (59 years ago)

flange single inlet inlet connection type, 1.628 inches nominal 1st outlet1.628 inches nominal outlet inside diameter, dry design type, 4.250 inches nominal overall diameter, 20.250 inches nominal overall length

Product Characteristics

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

Overall Length: 20.250 inches nominal
Inlet Connection Type: flange single inlet
Overall Diameter: 4.250 inches nominal
Outlet Inside Diameter: 1.628 inches nominal 1st outlet1.628 inches nominal
Design Type: dry
Coolant Type: air
Muffler Design: straight through
Body Shape: round
Inlet Location: located on bottom single inlet
Inlet Projection Length: 1.625 inches nominal single inlet1.625 inches nominal
Inlet Flange Shape: oval single inlet
Inlet Flange Mounting Provision And Quantity: 2 holes single inlet2 holes
Inlet Flange Mounting Hole Diameter: 0.469 inches nominal single inlet0.469 inches nominal
Inlet Outside Diameter: 2.125 inches nominal single inlet2.125 inches nominal
Inlet Inside Diameter: 2.003 inches nominal single inlet2.003 inches nominal
Outlet Connection Type: unthreaded 1st outlet
Outlet Location: located in end 1st outlet
Outlet Projection Length: 1.500 inches nominal 1st outlet1.500 inches nominal
Outlet Outside Diameter: 1.750 inches nominal 1st outlet1.750 inches nominal
Material: steel location not otherwise specified
Surface Treatment: aluminum

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
13212E1371	Exhaust Muffler
T8711	Exhaust Muffler

FAQs

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

What is the FSCG of the NSN 2990-00-971-5694?

The FSCG of the NSN 2990-00-971-5694 is 2990

Does the NSN 2990-00-971-5694 have a Schedule B code assigned?

Yes, the Schedule B code is 8708925000

Does NSN 2990-00-971-5694 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 2990-00-971-5694 contain precious materials?

Precious metal content is unknown

Does NSN 2990-00-971-5694 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 2990-00-971-5694 was assigned to the Federal Catalog?

It was assigned 59 years ago, on Wed, Sep 28, 1966