3AAXH2

View detailed technical data, stock status, and sourcing information for: 3AAXH2
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Federal Supply Group

Engine Accessories

Federal Supply Classification

2990 Nonaircraft Miscellaneous Engine Accessories

National Stock Number

2990-00-856-6235

Item Name Code

10849

Assigment Date

01/01/1962 (64 years ago)

dry design type, 5.063 inches nominal overall diameter, 2.000 inches nominal 1st outlet2.000 inches nominal outlet inside diameter, unthreaded single inlet inlet connection type, 12.000 inches nominal overall length

Product Characteristics

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

Overall Length: 12.000 inches nominal
Inlet Connection Type: unthreaded single inlet
Overall Diameter: 5.063 inches nominal
Outlet Inside Diameter: 2.000 inches nominal 1st outlet2.000 inches nominal
Design Type: dry
Coolant Type: air
Muffler Design: directional vane w/integral spark arrestor
Baffle Quantity: 1
Body Shape: round
Operating Position: universal
Inlet Location: centrally in end section of body single inlet
Inlet Projection Length: 1.500 inches nominal single inlet1.500 inches nominal
Inlet Outside Diameter: 2.125 inches nominal single inlet2.125 inches nominal
Inlet Inside Diameter: 2.000 inches nominal single inlet2.000 inches nominal
Outlet Connection Type: unthreaded 1st outlet
Outlet Location: centrally in end section of body 1st outlet
Outlet Projection Length: 1.500 inches nominal 1st outlet1.500 inches nominal
Outlet Outside Diameter: 2.125 inches nominal 1st outlet2.125 inches nominal
Material: steel location not otherwise specified
Surface Treatment: aluminum alloy

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
2920-00-846-3140	No Name Available	11/01/1975
2920-00-848-5089	No Name Available	07/16/1971

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
3AAXH2	Exhaust Muffler
3AC2H	Exhaust Muffler
49120-U	Exhaust Muffler
5C20B	Exhaust Muffler
A25209-4	Exhaust Muffler
U-49120	Exhaust Muffler

FAQs

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

What is the FSCG of the NSN 2990-00-856-6235?

The FSCG of the NSN 2990-00-856-6235 is 2990

Does the NSN 2990-00-856-6235 have a Schedule B code assigned?

Yes, the Schedule B code is 8708925000

Does NSN 2990-00-856-6235 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 2990-00-856-6235 contain precious materials?

Precious metal content is unknown

Does NSN 2990-00-856-6235 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 2990-00-856-6235 was assigned to the Federal Catalog?

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