2990-00-501-7257

Find complete technical information, availability, and procurement data for: 2990-00-501-7257
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Federal Supply Group

Engine Accessories

Federal Supply Classification

2990 Nonaircraft Miscellaneous Engine Accessories

National Stock Number

2990-00-501-7257

Item Name Code

10849

Assigment Date

07/09/1974 (52 years ago)

6.500 inches nominal overall width, 13.250 inches nominal overall length, 4.750 inches nominal overall height, 1.500 inches nominal 1st outlet1.500 inches nominal outlet inside diameter, flange single inlet inlet connection 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: 13.250 inches nominal
Overall Height: 4.750 inches nominal
Overall Width: 6.500 inches nominal
Inlet Connection Type: flange single inlet
Outlet Inside Diameter: 1.500 inches nominal 1st outlet1.500 inches nominal
Design Type: dry
Coolant Type: air
Muffler Design: baffle
Baffle Quantity: 1
Tube Quantity: 1
Body Shape: oval
Inlet Location: 2.000 in. from end of body t c of flange single inlet
Inlet Projection Length: 1.000 inches nominal single inlet1.000 inches nominal
Inlet Flange Shape: oval single inlet
Inlet Flange Mounting Provision And Quantity: 2 holes single inlet2 holes
Inlet Flange Mounting Hole Diameter: 0.438 inches nominal single inlet0.438 inches nominal
Inlet Flange Mounting Provision Spacing: 2.688 in. c to c dis of holes single inlet
Outlet Connection Type: unthreaded 1st outlet
Outlet Location: centrally located in end section of body opposite inlet end 1st outlet
Outlet Projection Length: 1.500 inches nominal 1st outlet1.500 inches nominal
Outlet Outside Diameter: 1.375 inches nominal 1st outlet1.375 inches nominal
Outlet Integral Tail Pipe Length: 2.000 inches nominal 1st outlet2.000 inches nominal
Special Features: tailpipe 90.0 deg elbow
Material: steel location not otherwise specified

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
40002400	Exhaust Muffler

FAQs

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

What is the FSCG of the NSN 2990-00-501-7257?

The FSCG of the NSN 2990-00-501-7257 is 2990

Does the NSN 2990-00-501-7257 have a Schedule B code assigned?

Yes, the Schedule B code is 8708925000

Does NSN 2990-00-501-7257 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 2990-00-501-7257 contain precious materials?

Precious metal content is unknown

Does NSN 2990-00-501-7257 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 2990-00-501-7257 was assigned to the Federal Catalog?

It was assigned 52 years ago, on Tue, Jul 9, 1974