2990-00-857-2005

Find complete technical information, availability, and procurement data for: 2990-00-857-2005
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Federal Supply Group

Engine Accessories

Federal Supply Classification

2990 Nonaircraft Miscellaneous Engine Accessories

National Stock Number

2990-00-857-2005

Item Name Code

10849

Assigment Date

10/04/1967 (58 years ago)

dry design type, unthreaded single inlet inlet connection type, air coolant type, 7.938 inches nominal overall length, 6.500 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: 7.938 inches nominal
Inlet Connection Type: unthreaded single inlet
Overall Diameter: 6.500 inches nominal
Design Type: dry
Coolant Type: air
Muffler Design: straight through w/baffle
Baffle Quantity: 1
Tube Quantity: 3
Body Shape: round
Operating Position: universal
Inlet Location: centered on end of body single inlet
Inlet Projection Length: 2.812 inches nominal single inlet2.812 inches nominal
Inlet Inside Diameter: 2.005 inches minimum and 2.015 inches maximum single inlet
Outlet Connection Type: unthreaded 1st outlet
Outlet Connection Type: unthreaded 2nd outlet
Outlet Location: offset in end section of body,offset in end section of body 3.876 in. c to c of outlets 1st outlet
Outlet Projection Length: 0.938 inches nominal 2nd outlet
Outlet Projection Length: 0.938 inches nominal 1st outlet
Outlet Outside Diameter: 1.500 inches nominal 1st outlet
Outlet Outside Diameter: 1.500 inches nominal 2nd outlet
Special Features: carriage bold and clmap on the inlet
Material: steel location not otherwise specified
Surface Treatment: paint heat resistant

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
2990-00-100-4058	No Name Available	03/21/1973
2990-00-869-6038	No Name Available	11/01/1979
2990-00-950-9896	No Name Available	11/01/1981

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
260338C	Exhaust Muffler
7240200	Exhaust Muffler
ABT1186	Exhaust Muffler
T-1186	Exhaust Muffler

FAQs

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

What is the FSCG of the NSN 2990-00-857-2005?

The FSCG of the NSN 2990-00-857-2005 is 2990

Does the NSN 2990-00-857-2005 have a Schedule B code assigned?

Yes, the Schedule B code is 8708925000

Does NSN 2990-00-857-2005 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 2990-00-857-2005 contain precious materials?

Precious metal content is unknown

Does NSN 2990-00-857-2005 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 2990-00-857-2005 was assigned to the Federal Catalog?

It was assigned 58 years ago, on Wed, Oct 4, 1967