The Muffler,exhaust, cataloged under National Stock Number 2990-01-568-5792, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 4 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-01-568-5792 |
| Primary Part Number | 593-7556850 PC31 |
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Muffler Design | STRAIGHT THROUGH |
| Inlet Connection Type | THREADED SINGLE INLET |
| Body Shape | ROUND |
| 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 |
|---|---|
| 593-7556850 PC31 PRIMARY | Naval Sea Systems Command (USA) |
| 9835K43 | Mcmaster-Carr Supply Co (USA) |
| Reference | Meaning |
|---|---|
| 9835K23 | 5/9 Secondary reference Mcmaster-Carr Supply Co |
NSN 2990-01-568-5792 is a Muffler,exhaust, manufactured by Naval Sea Systems Command, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-01-568-5792 has 2 manufacturer part numbers on file: 593-7556850 PC31 (Naval Sea Systems Command), 9835K43 (Mcmaster-Carr Supply Co).
Key specifications for 593-7556850 PC31: Overall Length: 2.187 INCHES NOMINAL IN; Muffler Design: STRAIGHT THROUGH; Inlet Connection Type: THREADED SINGLE INLET; Body Shape: ROUND. 4 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.