The Muffler,exhaust, cataloged under National Stock Number 2990-00-971-5694, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Cummins Filtration Inc.. Government technical data includes 20 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-00-971-5694 |
| Primary Part Number | T8711 |
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Cummins Filtration Inc. |
| Status | ACTIVE |
| Inlet Flange Shape | OVAL SINGLE INLET |
| Inlet Outside Diameter | 2.125 INCHES NOMINAL SINGLE INLET IN |
| Inlet Location | LOCATED ON BOTTOM |
| Coolant Type | AIR |
| Design Type | DRY |
| Overall Diameter | 4.250 INCHES NOMINAL IN |
| Outlet Inside Diameter | 1.628 INCHES NOMINAL FIRST OUTLET IN |
| Inlet Projection Length | 1.625 INCHES NOMINAL SINGLE INLET IN |
| Inlet Flange Mounting Hole Diameter | 0.469 INCHES NOMINAL SINGLE INLET IN |
| Muffler Design | STRAIGHT THROUGH |
| Outlet Outside Diameter | 1.750 INCHES NOMINAL FIRST OUTLET IN |
| Inlet Connection Type | FLANGE SINGLE INLET |
| Body Shape | ROUND |
| Inlet Flange Mounting Provision and Quantity | 2 HOLES SINGLE INLET |
| Surface Treatment | ALUMINUM |
| Inlet Inside Diameter | 2.003 INCHES NOMINAL SINGLE INLET IN |
| Material | STEEL LOCATION NOT OTHERWISE SPECIFIED |
| Outlet Projection Length | 1.500 INCHES NOMINAL FIRST OUTLET IN |
| Outlet Connection Type | UNTHREADED FIRST OUTLET |
| Outlet Location | LOCATED IN END |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| T8711 PRIMARY | Cummins Filtration Inc. (USA) |
| Reference | Meaning |
|---|---|
| 13212E1371 | 1/2 Source control — Government-approved source U.S. Government activity |
NSN 2990-00-971-5694 is a Muffler,exhaust, manufactured by Cummins Filtration Inc., classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-00-971-5694 has 1 manufacturer part number on file: T8711 (Cummins Filtration Inc.).
1 possible match (shared part number, not a government interchangeability claim): 4920-01-336-2177. Verify interchangeability with system specifications before substitution.
Key specifications for T8711: Inlet Flange Shape: OVAL SINGLE INLET; Inlet Outside Diameter: 2.125 INCHES NOMINAL SINGLE INLET IN; Inlet Location: LOCATED ON BOTTOM; Coolant Type: AIR. 20 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.