157-050

View detailed technical data, stock status, and sourcing information for: 157-050
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Federal Supply Group

Engine Accessories

Federal Supply Classification

2990 Nonaircraft Miscellaneous Engine Accessories

National Stock Number

2990-00-269-7145

Item Name Code

10849

Assigment Date

01/01/1963 (63 years ago)

right-hand single inlet inlet thread direction, 0.620 inches nominal 1st outlet0.620 inches nominal outlet inside diameter, 3.750 inches nominal overall length, threaded single inlet inlet connection type, 1.688 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: 3.750 inches nominal
Inlet Connection Type: threaded single inlet
Inlet Thread Direction: right-hand single inlet
Overall Diameter: 1.688 inches nominal
Outlet Inside Diameter: 0.620 inches nominal 1st outlet0.620 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: 1/2-14 single inlet
Inlet Thread Location: external single inlet
Outlet Connection Type: unthreaded 1st outlet
Outlet Location: centrally located in end section of body 1st outlet
Outlet Projection Length: 0.2031 inches nominal 1st outlet0.2031 inches nominal
Outlet Outside Diameter: 0.840 inches nominal 1st outlet0.840 inches nominal
Material: steel location not otherwise specified

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
4310-00-132-0658	No Name Available	06/22/1974
2990-00-148-0300	No Name Available	07/01/1976
2990-00-269-7144	No Name Available	11/03/1972
2990-00-356-0841	No Name Available	01/01/1963
2990-00-401-3919	No Name Available	05/28/1973
2990-00-591-3270	No Name Available	01/01/1963
2990-00-776-6924	No Name Available	06/16/1969

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
157-050	Exhaust Muffler
292539	Exhaust Muffler
7377905	Exhaust Muffler
A98-24	Exhaust Muffler
AX11488	Exhaust Muffler
U89966	Exhaust Muffler
WD66S1	Exhaust Muffler
WPP3034	Exhaust Muffler

FAQs

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

What is the FSCG of the NSN 2990-00-269-7145?

The FSCG of the NSN 2990-00-269-7145 is 2990

Does the NSN 2990-00-269-7145 have a Schedule B code assigned?

Yes, the Schedule B code is 8708925000

Does NSN 2990-00-269-7145 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 2990-00-269-7145 contain precious materials?

Precious metal content is unknown

Does NSN 2990-00-269-7145 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 2990-00-269-7145 was assigned to the Federal Catalog?

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