The Muffler,exhaust, cataloged under National Stock Number 2990-01-282-2566, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. Government technical data includes 5 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-01-282-2566 |
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Status | ACTIVE |
| Water Inlet Connection Type | UNTHREADED |
| Design Type | WET |
| Overall Diameter | 12.750 INCHES NOMINAL IN |
| Water Inlet Outside Diameter | 6.000 INCHES NOMINAL IN |
| Body Shape | ROUND |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| MP-31 SIZE 6 | C/1 Advisory reference — outside the item-of-supply concept Maxim Industries Inc |
| MP-31-6IN | C/1 Advisory reference — outside the item-of-supply concept Beaird Industries Inc. |
| MP31-6 | 3/9 Design control — primary reference Maxco, Llc Dba Maxim Silencers |
| MP31-6 | 5/9 Secondary reference Beaird Industries Inc. |
NSN 2990-01-282-2566 is a Muffler,exhaust, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
Key specifications for 2990-01-282-2566: Water Inlet Connection Type: UNTHREADED; Design Type: WET; Overall Diameter: 12.750 INCHES NOMINAL IN; Overall Length: 42.000 INCHES NOMINAL IN. 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.