The Muffler,exhaust, cataloged under National Stock Number 2990-00-235-4707, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Phillips and Temro Industries Inc E M Products Div. Government technical data includes 29 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-00-235-4707 |
| Primary Part Number | TDU-02-981180 |
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Phillips and Temro Industries Inc E M Products Div |
| Status | ACTIVE |
| Inlet Flange Shape | OVAL SINGLE INLET |
| Operating Position | VERTICAL |
| Inlet Location | CENTRALLY LOCATED IN TOP |
| Coolant Type | AIR |
| Outlet Flange Mounting Provision and Quantity | 2 HOLES FIRST OUTLET |
| Inlet Flange Mounting Provision Thread Direction | RIGHT-HAND SINGLE INLET |
| Outlet Flange Mounting Stud Length | 0.312 INCHES NOMINAL FIRST OUTLET IN |
| Outlet Flange Mounting Provision Thread Direction | RIGHT-HAND FIRST OUTLET |
| Design Type | DRY |
| Overall Diameter | 5.120 INCHES NOMINAL IN |
| Center to Center Distance Between Mounting Holes | 2.688 IN. C TO C DIM. OF MTG HOLES SINGLE INLET IN |
| Inlet Projection Length | 2.000 INCHES NOMINAL SINGLE INLET IN |
| Inlet Flange Mounting Hole Diameter | 0.375 INCHES NOMINAL SINGLE INLET IN |
| Muffler Design | BAFFLE |
| Outlet Flange Shape | OVAL FIRST OUTLET |
| Inlet Connection Type | FLANGE SINGLE INLET |
| Body Shape | ROUND |
| Inlet Flange Mounting Provision and Quantity | 2 HOLES SINGLE INLET |
| Thread Size | 0.375-16 FIRST OUTLET FLANGE MOUNTING PROVISION |
| Thread Size | 0.375-16 SINGLE INLET FLANGE MOUNTING PROVISION |
| Surface Treatment | ALUMINUM |
| Outlet Flange Mounting Hole Diameter | 0.375 INCHES NOMINAL FIRST OUTLET IN |
| Material | STEEL LOCATION NOT OTHERWISE SPECIFIED |
| Outlet Projection Length | 0.500 INCHES NOMINAL FIRST OUTLET IN |
| Outlet Flange Mounting Provision Spacing | 2.688 IN. C TO C DIM. OF MTG HOLES IN |
| Inlet Flange Mounting Provision Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) SINGLE INLET |
| Outlet Connection Type | FLANGE FIRST OUTLET |
| Outlet Location | LOCATED IN SIDE OF BODY CENTERLINE 1.500 IN. FROM BOTTOM IN |
| Outlet Flange Mounting Provision Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) FIRST OUTLET |
| 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 |
|---|---|
| TDU-02-981180 | Phillips and Temro Industries Inc E M Products Div (USA) |
| Reference | Meaning |
|---|---|
| 507BDX15-8 | 5/9 Secondary reference U.S. Government activity |
| 05-4006 | 5/9 Secondary reference Libby Power Systems, Llc |
| TDU02-0038 | 5/9 Secondary reference Phillips and Temro Industries Inc E M Products Div |
| 13205E5469 | 3/2 Design control — primary reference U.S. Government activity |
NSN 2990-00-235-4707 is a Muffler,exhaust, manufactured by Phillips and Temro Industries Inc E M Products Div, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-00-235-4707 has 1 manufacturer part number on file: TDU-02-981180 (Phillips and Temro Industries Inc E M Products Div).
1 possible match (shared part number, not a government interchangeability claim): 5895-01-032-9086. Verify interchangeability with system specifications before substitution.
Key specifications for TDU-02-981180: Inlet Flange Shape: OVAL SINGLE INLET; Operating Position: VERTICAL; Inlet Location: CENTRALLY LOCATED IN TOP; Coolant Type: AIR. 29 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.