The Muffler,exhaust, cataloged under National Stock Number 2990-00-192-8953, 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 22 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-00-192-8953 |
| Primary Part Number | 20-116-AB |
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Nelson Industries Inc Universal Silencer Div |
| Status | ACTIVE |
| Inlet Flange Shape | ROUND SINGLE INLET |
| Operating Position | UNIVERSAL |
| Inlet Location | CENTRALLY LOCATED IN END SECTION OF BODY |
| Coolant Type | AIR |
| Outlet Flange Mounting Provision and Quantity | 16 HOLES FIRST OUTLET |
| Design Type | DRY |
| Overall Diameter | 36.000 INCHES NOMINAL IN |
| Center to Center Distance Between Mounting Holes | HOLES EQUALLY SPACED ON 21.250 IN. DIA BOLT CIRCLE SINGLE INLET IN |
| Inlet Projection Length | 3.500 INCHES NOMINAL SINGLE INLET IN |
| Inlet Flange Mounting Hole Diameter | 1.125 INCHES NOMINAL SINGLE INLET IN |
| Outlet Flange Shape | ROUND FIRST OUTLET |
| Inlet Connection Type | FLANGE SINGLE INLET |
| Body Shape | ROUND |
| Inlet Flange Mounting Provision and Quantity | 16 HOLES SINGLE INLET |
| Unable to Decode | UNABLE TO DECODE |
| Unable to Decode | UNABLE TO DECODEUNABLE TO DECODE |
| Outlet Flange Mounting Hole Diameter | 1.125 INCHES NOMINAL FIRST OUTLET IN |
| Material | STEEL LOCATION NOT OTHERWISE SPECIFIED |
| Outlet Projection Length | 3.500 INCHES NOMINAL FIRST OUTLET IN |
| Outlet Flange Mounting Provision Spacing | HOLES EQUALLY SPACED ON 21.250 IN. DIA BOLT CIRCLE IN |
| Outlet Connection Type | FLANGE FIRST OUTLET |
| Outlet Location | CENTRALLY LOCATED IN END OPPOSITE INLET |
| 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 |
|---|---|
| 20-116-AB PRIMARY | Nelson Industries Inc Universal Silencer Div (USA) |
| Reference | Meaning |
|---|---|
| 22-1958 | 5/9 Secondary reference Nelson Industries Inc Universal Silencer Div |
NSN 2990-00-192-8953 is a Muffler,exhaust, manufactured by Nelson Industries Inc Universal Silencer Div, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-00-192-8953 has 1 manufacturer part number on file: 20-116-AB (Nelson Industries Inc Universal Silencer Div).
3 possible matches (shared part number, not a government interchangeability claim): 1420-00-402-6885, 2530-00-426-8357, 2640-01-607-1332. Verify interchangeability with system specifications before substitution.
Key specifications for 20-116-AB: Inlet Flange Shape: ROUND SINGLE INLET; Operating Position: UNIVERSAL; Inlet Location: CENTRALLY LOCATED IN END SECTION OF BODY; Coolant Type: AIR. 22 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.