The Muffler,intake, cataloged under National Stock Number 2990-01-225-5933, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Nelson Industries Inc Universal Silencer Div. Government technical data includes 11 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-01-225-5933 |
| Primary Part Number | UCIX-3 1/2 IN. |
| Item Name | Muffler,intake |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Nelson Industries Inc Universal Silencer Div |
| Status | ACTIVE |
| Inlet Flange Shape | ROUND SINGLE INLET |
| Inlet Location | CENTRALLY LOCATED IN END SECTION OF BODY |
| Coolant Type | AIR |
| Design Type | DRY |
| Overall Diameter | 12.000 INCHES NOMINAL IN |
| Inlet Connection Quantity | 1 |
| Muffler Design | MULTIPASS |
| Inlet Connection Type | FLANGE SINGLE INLET |
| Body Shape | ROUND |
| Inlet Flange Mounting Provision and Quantity | 12 HOLES SINGLE INLET |
| Material | STEEL |
| 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 |
|---|---|
| UCIX-3 1/2 IN. PRIMARY | Nelson Industries Inc Universal Silencer Div (USA) |
| Reference | Meaning |
|---|---|
| 53-904-XX | C/1 Advisory reference — outside the item-of-supply concept Nelson Industries Inc Universal Silencer Div |
NSN 2990-01-225-5933 is a Muffler,intake, manufactured by Nelson Industries Inc Universal Silencer Div, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-01-225-5933 has 1 manufacturer part number on file: UCIX-3 1/2 IN. (Nelson Industries Inc Universal Silencer Div).
Key specifications for UCIX-3 1/2 IN.: Inlet Flange Shape: ROUND SINGLE INLET; Inlet Location: CENTRALLY LOCATED IN END SECTION OF BODY; Coolant Type: AIR; Design Type: DRY. 11 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.