ABT1769

View detailed technical data, stock status, and sourcing information for: ABT1769
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Federal Supply Group

Engine Accessories

Federal Supply Classification

2990 Nonaircraft Miscellaneous Engine Accessories

National Stock Number

2990-00-254-9954

Item Name Code

10849

Assigment Date

01/01/1963 (63 years ago)

5.250 inches nominal overall diameter, threaded single inlet inlet connection type, dry design type, 7.937 inches nominal overall length, 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: 7.937 inches nominal
Inlet Connection Type: threaded single inlet
Inlet Thread Direction: right-hand single inlet
Overall Diameter: 5.250 inches nominal
Design Type: dry
Coolant Type: air
Muffler Design: baffle
Baffle Quantity: 1
Tube Quantity: 1
Body Shape: round
Operating Position: universal
Inlet Location: centrally located in end section of body single inlet
Inlet Projection Length: 1.250 inches nominal single inlet1.250 inches nominal
Inlet Thread Size: 1-11-1/2 single inlet
Inlet Thread Series Designator: npt single inlet
Inlet Thread Location: external single inlet
Outlet Connection Type: threaded 1st outlet
Outlet Location: centrally located in end section of body 1st outlet
Outlet Projection Length: 1.250 inches nominal 1st outlet1.250 inches nominal
Outlet Thread Size: 1-11-1/2 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
Surface Treatment: zinc

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
2990-00-341-4050	No Name Available	01/01/1963

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
86654	Exhaust Muffler
8903	Exhaust Muffler
89033	Exhaust Muffler
89954	Exhaust Muffler
ABT1769	Exhaust Muffler
T-1211	Exhaust Muffler
T-1378	Exhaust Muffler

FAQs

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

What is the FSCG of the NSN 2990-00-254-9954?

The FSCG of the NSN 2990-00-254-9954 is 2990

Does the NSN 2990-00-254-9954 have a Schedule B code assigned?

Yes, the Schedule B code is 8708925000

Does NSN 2990-00-254-9954 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 2990-00-254-9954 contain precious materials?

Precious metal content is unknown

Does NSN 2990-00-254-9954 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 2990-00-254-9954 was assigned to the Federal Catalog?

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