3R25727

View detailed technical data, stock status, and sourcing information for: 3R25727
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Federal Supply Group

Engine Accessories

Federal Supply Classification

2990 Nonaircraft Miscellaneous Engine Accessories

National Stock Number

2990-00-805-0830

Item Name Code

10849

Assigment Date

01/01/1962 (64 years ago)

13.438 inches nominal overall length, right-hand single inlet inlet thread direction, threaded single inlet inlet connection type, 4.625 inches nominal overall diameter, dry design 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: 13.438 inches nominal
Inlet Connection Type: threaded single inlet
Inlet Thread Direction: right-hand single inlet
Overall Diameter: 4.625 inches nominal
Design Type: dry
Coolant Type: air
Muffler Design: baffle
Baffle Quantity: 1
Tube Quantity: 3
Body Shape: round
Operating Position: horizontal
Inlet Location: 1-3/8 in. c to c from horizontal center line single inlet
Inlet Projection Length: 0.813 inches nominal single inlet0.813 inches nominal
Inlet Thread Size: 1-1/4-11-1/2 single inlet
Inlet Thread Series Designator: npt single inlet
Inlet Thread Location: external single inlet
Outlet Connection Type: threaded 1st outlet
Outlet Location: 1 in. c to c from horizontal center line 1st outlet
Outlet Projection Length: 0.813 inches nominal 1st outlet0.813 inches nominal
Outlet Thread Size: 1-1/4-11-1/2 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
Fsc Application Data: engine exhaust system,nonaircraft

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
2990-00-985-4826	No Name Available	03/01/1979

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
3R25727	Exhaust Muffler
ABT5646	Exhaust Muffler
T-5646	Exhaust Muffler

FAQs

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

What is the FSCG of the NSN 2990-00-805-0830?

The FSCG of the NSN 2990-00-805-0830 is 2990

Does the NSN 2990-00-805-0830 have a Schedule B code assigned?

Yes, the Schedule B code is 8708925000

Does NSN 2990-00-805-0830 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 2990-00-805-0830 contain precious materials?

Precious metal content is unknown

Does NSN 2990-00-805-0830 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 2990-00-805-0830 was assigned to the Federal Catalog?

It was assigned 64 years ago, on Mon, Jan 1, 1962