T-12921

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T-12921
Federal Supply Group
Engine Accessories
National Stock Number
2990-01-004-1941
Item Name Code
10849
Assigment Date
05/29/1975 (51 years ago)

A vehicular item with a yoke on one or both ends. The yoke(s) may include a spider. If only one yoke, the opposite end may have a shaft or tube. For items with a universal joint see propeller shaft with universal joint (as modified). Also see yoke, universal joint (as modified). For rotary wing aircraft, see propeller shaft, rotary wing aircraft.

7.120 inches nominal overall diameter, unthreaded single inlet inlet connection type, dry design type, 2.880 inches nominal 1st outlet2.880 inches nominal outlet inside diameter, 25.500 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
25.500 inches nominal
Inlet Connection Type
unthreaded single inlet
Overall Diameter
7.120 inches nominal
Outlet Inside Diameter
2.880 inches nominal 1st outlet2.880 inches nominal
Design Type
dry
Coolant Type
air
Muffler Design
baffle w/integral spark arrestor
Baffle Quantity
2
Tube Quantity
1
Body Shape
round
Operating Position
horizontal
Inlet Location
located in bottom of end section single inlet
Inlet Projection Length
5.380 inches nominal single inlet5.380 inches nominal
Inlet Outside Diameter
2.620 inches nominal single inlet2.620 inches nominal
Inlet Inside Diameter
2.500 inches nominal single inlet2.500 inches nominal
Outlet Connection Type
unthreaded 1st outlet
Outlet Location
located in center of end section opposite inlet 1st outlet
Outlet Projection Length
2.500 inches nominal 1st outlet2.500 inches nominal
Outlet Outside Diameter
2.000 inches nominal 1st outlet2.000 inches nominal
Special Features
furnished with 0.750 in. npt cleanout plug
Material
steel location not otherwise specified
Surface Treatment
plastic polypropylene

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
239798 Exhaust Muffler
ABT12921 Exhaust Muffler
T-12921 Exhaust Muffler

FAQs

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

What is the FSCG of the NSN 2990-01-004-1941?
The FSCG of the NSN 2990-01-004-1941 is 2990
Does the NSN 2990-01-004-1941 have a Schedule B code assigned?
Yes, the Schedule B code is 8708925000
Does NSN 2990-01-004-1941 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 2990-01-004-1941 contain precious materials?
Precious metal content is unknown
Does NSN 2990-01-004-1941 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 2990-01-004-1941 was assigned to the Federal Catalog?
It was assigned 51 years ago, on Thu, May 29, 1975

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