The Muffler,exhaust, cataloged under National Stock Number 2990-00-471-8606, is classified within Federal Supply Class 2990 (No Item Name Available) of the Engine Accessories group. The primary manufacturer of record is Maremont Corp. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 6 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-00-471-8606 |
| Primary Part Number | HD3 |
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 / 29 — No Item Name Available |
| Manufacturer | Maremont Corp |
| Status | ACTIVE |
| Outlet Inside Diameter | 2.000 INCHES NOMINAL FIRST OUTLET IN |
| Outlet Connection Type | UNTHREADED FIRST OUTLET |
| Inlet Inside Diameter | 2.000 INCHES NOMINAL SINGLE INLET IN |
| Outlet Projection Length | 3.250 INCHES NOMINAL FIRST OUTLET IN |
| Inlet Location | OFFSET FROMCENTER OFEND OF BODY |
| Outlet Location | OFFSETFROM CENTER OFEND OF BODY |
| Outlet Outside Diameter | 2.125 INCHES NOMINAL FIRST OUTLET IN |
| Surface Treatment | ALUMINUM ALLOY |
| Material | STEEL LOCATION NOT OTHERWISE SPECIFIED |
| Inlet Projection Length | 3.250 INCHES NOMINAL SINGLE INLET IN |
| Coolant Type | AIR |
| Overall Diameter | 6.000 INCHES NOMINAL IN |
| Design Type | DRY |
| Tube Quantity | 3 |
| Body Shape | ROUND |
| Inlet Connection Type | UNTHREADED SINGLE INLET |
| Muffler Design | MULTIPASS |
| Operating Position | HORIZONTAL |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| HD3 PRIMARY | Maremont Corp (USA) |
| 3954016 | General Motors Corp Chevrolet Motor Div Special Products Dept (USA) |
| 3954016 | General Motors Llc Dba General Motors Llc (USA) |
| 21169 PRIMARY | Walker Mfg Co (USA) |
| 86136-M PRIMARY | Cummins Filtration Inc. (USA) |
| T-86136 | Cummins Filtration Inc. (USA) |
| 3954016 | General Motors Corp (USA) |
NSN 2990-00-471-8606 is a Muffler,exhaust, manufactured by Maremont Corp, classified under FSC 2990 (No Item Name Available). Status: active.
NSN 2990-00-471-8606 has 7 cross-referenced part numbers: HD3 (Maremont Corp), 3954016 (General Motors Corp Chevrolet Motor Div Special Products Dept), 3954016 (General Motors Llc Dba General Motors Llc), 21169 (Walker Mfg Co), 86136-M (Cummins Filtration Inc.) and 2 more.
There are 12 known substitutes for 2990-00-471-8606: 4320-00-236-2608, 4930-00-300-5888, 6160-00-358-6606 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for HD3: Outlet Inside Diameter: 2.000 INCHES NOMINAL FIRST OUTLET IN; Outlet Connection Type: UNTHREADED FIRST OUTLET; Inlet Inside Diameter: 2.000 INCHES NOMINAL SINGLE INLET IN; Outlet Projection Length: 3.250 INCHES NOMINAL FIRST OUTLET IN. 19 total characteristics are documented in the Federal Logistics Information System.