The Muffler,exhaust, cataloged under National Stock Number 2990-01-218-3657, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Dana Off Highway Products, Llc. Government technical data includes 5 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-01-218-3657 |
| Primary Part Number | 2331568 |
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Dana Off Highway Products, Llc |
| Status | ACTIVE |
| Operating Position | HORIZONTAL |
| Overall Diameter | 4.000 INCHES NOMINAL IN |
| Body Shape | ROUND |
| Inlet Inside Diameter | 1.515 INCHES NOMINAL SINGLE INLET IN |
| Material | STEEL LOCATION NOT OTHERWISE SPECIFIED |
| 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 |
|---|---|
| 2331568 PRIMARY | Dana Off Highway Products, Llc (USA) |
| Reference | Meaning |
|---|---|
| 2331568 | 5/9 Secondary reference Clark Equipment Co |
| 2331568 | 5/9 Secondary reference U.S. Government activity |
NSN 2990-01-218-3657 is a Muffler,exhaust, manufactured by Dana Off Highway Products, Llc, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-01-218-3657 has 1 manufacturer part number on file: 2331568 (Dana Off Highway Products, Llc).
Key specifications for 2331568: Operating Position: HORIZONTAL; Overall Diameter: 4.000 INCHES NOMINAL IN; Overall Length: 12.250 INCHES NOMINAL IN; Body Shape: ROUND. 5 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.