2990-00-488-8639

Find complete technical information, availability, and procurement data for: 2990-00-488-8639
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Federal Supply Group

Engine Accessories

Federal Supply Classification

2990 Nonaircraft Miscellaneous Engine Accessories

National Stock Number

2990-00-488-8639

Item Name Code

10849

Assigment Date

05/18/1970 (56 years ago)

24.000 inches nominal overall length, 6.000 inches nominal overall diameter, dry design type, threaded single inlet inlet connection type, right-hand single inlet inlet thread direction

Product Characteristics

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

Overall Length: 24.000 inches nominal
Inlet Connection Type: threaded single inlet
Inlet Thread Direction: right-hand single inlet
Overall Diameter: 6.000 inches nominal
Design Type: dry
Coolant Type: air
Muffler Design: multipass
Tube Quantity: 2
Body Shape: round
Inlet Location: offset located on end of body single inlet
Inlet Projection Length: 2.000 inches nominal single inlet2.000 inches nominal
Inlet Thread Size: 2-11-1/2 single inlet
Inlet Thread Series Designator: npt single inlet
Inlet Thread Location: external single inlet
Outlet Connection Type: threaded 1st outlet
Outlet Location: offset located on end of body 1st outlet
Outlet Projection Length: 2.000 inches nominal 1st outlet2.000 inches nominal
Outlet Thread Size: 2-11-1/2 1st outlet
Outlet Thread Series Designator: npt 1st outlet
Outlet Thread Direction: right-hand 1st outlet
Outlet Thread Location: external 1st outlet
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
1421D158-8	Exhaust Muffler
620GS2	Exhaust Muffler

FAQs

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

What is the FSCG of the NSN 2990-00-488-8639?

The FSCG of the NSN 2990-00-488-8639 is 2990

Does the NSN 2990-00-488-8639 have a Schedule B code assigned?

Yes, the Schedule B code is 8708925000

Does NSN 2990-00-488-8639 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 2990-00-488-8639 contain precious materials?

Precious metal content is unknown

Does NSN 2990-00-488-8639 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 2990-00-488-8639 was assigned to the Federal Catalog?

It was assigned 56 years ago, on Mon, May 18, 1970