The Muffler,exhaust, cataloged under National Stock Number 2990-00-293-6818, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Dcm Manufacturing, Inc.. Government technical data includes 21 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-00-293-6818 |
| Primary Part Number | B5615-1 |
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Dcm Manufacturing, Inc. |
| Status | ACTIVE |
| Inlet Flange Shape | SQUARE SINGLE INLET |
| Operating Position | HORIZONTAL |
| Inlet Outside Diameter | 1.375 INCHES NOMINAL SINGLE INLET IN |
| Inlet Location | CENTRALLY LOCATED IN END SECTION OF BODY |
| Coolant Type | AIR |
| Design Type | DRY |
| Overall Diameter | 3.250 INCHES NOMINAL IN |
| Outlet Inside Diameter | 1.422 INCHES NOMINAL FIRST OUTLET IN |
| Inlet Projection Length | 0.875 INCHES NOMINAL SINGLE INLET IN |
| Inlet Flange Mounting Hole Diameter | 0.313 INCHES NOMINAL SINGLE INLET IN |
| Muffler Design | STRAIGHT THROUGH |
| Outlet Outside Diameter | 2.000 INCHES NOMINAL FIRST OUTLET IN |
| Inlet Connection Type | UNTHREADED FIRST INLET |
| Inlet Connection Type | FLANGE SECOND INLET |
| Body Shape | ROUND |
| Inlet Flange Mounting Provision and Quantity | 4 HOLES SINGLE INLET |
| Inlet Inside Diameter | 1.250 INCHES NOMINAL SINGLE INLET IN |
| Material | STEEL LOCATION NOT OTHERWISE SPECIFIED |
| Outlet Projection Length | 0.719 INCHES NOMINAL FIRST OUTLET IN |
| Outlet Connection Type | UNTHREADED FIRST OUTLET |
| Outlet Location | CENTRALLY LOCATED IN END SECTION OF BODY |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 2990-00-293-6818 is a Muffler,exhaust, manufactured by Dcm Manufacturing, Inc., classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-00-293-6818 has 2 manufacturer part numbers on file: B5615-1 (Dcm Manufacturing, Inc.), 7399131 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for B5615-1: Inlet Flange Shape: SQUARE SINGLE INLET; Operating Position: HORIZONTAL; Inlet Outside Diameter: 1.375 INCHES NOMINAL SINGLE INLET IN; Inlet Location: CENTRALLY LOCATED IN END SECTION OF BODY. 21 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.