The Muffler,exhaust, cataloged under National Stock Number 2990-00-410-7543, is classified within Federal Supply Class 2990 (No Item Name Available) of the Engine Accessories group. The primary manufacturer of record is 893 Mfg, Llc. Government technical data includes 22 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 2 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 | 2990-00-410-7543 |
| Primary Part Number | 6390 |
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 / 29 — No Item Name Available |
| Manufacturer | 893 Mfg, Llc |
| Status | ACTIVE |
| Inlet Flange Mounting Hole Diameter | 0.438 INCHES NOMINAL SINGLE INLET IN |
| Surface Treatment | CHROMATE |
| Outlet Thread Size | 1-1/4-11-1/2 FIRST OUTLET |
| Outlet Connection Type | THREADED FIRST OUTLET |
| Overall Diameter | 5.062 INCHES NOMINAL IN |
| Design Type | DRY |
| Inlet Projection Length | 1.312 INCHES NOMINAL SINGLE INLET IN |
| Thread Location | EXTERNAL FIRST OUTLET |
| Material | STEEL LOCATION NOT OTHERWISE SPECIFIED |
| Inlet Flange Mounting Provision and Quantity | 2 HOLES SINGLE INLET |
| Inlet Flange Shape | OVAL SINGLE INLET |
| Outlet Thread Direction | RIGHT-HAND FIRST OUTLET |
| Inlet Location | CENTRALLY LOCATED ON VERTICAL CENTER LINE 1.500 IN. C TO C ABOVE HORIZONTAL CENTER LINE IN END SECTION OF BODY IN |
| Outlet Projection Length | 1.000 INCHES NOMINAL FIRST OUTLET IN |
| Material Document and Classification | MIL-S-46055 MIL SPEC SINGLE MATERIAL RESPONSE LOCATION NOT OTHERWISE SPECIFIED |
| Coolant Type | AIR |
| Outlet Location | LOCATED ON HORIZONTAL CENTERLINE 1-3/8 IN. FROM END IN |
| Inlet Connection Type | FLANGE SINGLE INLET |
| Outlet Thread Series Designator | NPT FIRST OUTLET |
| Center to Center Distance Between Mounting Holes | 2-11/16 IN. C TO C DIM OF MTG HOLES SINGLE INLET IN |
| Body Shape | ROUND |
| Operating Position | HORIZONTAL |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 2990-00-410-7543 is a Muffler,exhaust, manufactured by 893 Mfg, Llc, classified under FSC 2990 (No Item Name Available). Status: active.
NSN 2990-00-410-7543 has 4 cross-referenced part numbers: D2467S (893 Mfg, Llc), D-2467-S (Alexander Tagg Industries Inc), 2467B (Alexander Tagg Industries Inc), 6390 (893 Mfg, Llc).
There are 12 known substitutes for 2990-00-410-7543: 5930-00-092-6188, 5340-00-143-5177, 6695-00-147-3102 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 6390: Inlet Flange Mounting Hole Diameter: 0.438 INCHES NOMINAL SINGLE INLET IN; Surface Treatment: CHROMATE; Outlet Thread Size: 1-1/4-11-1/2 FIRST OUTLET; Outlet Connection Type: THREADED FIRST OUTLET. 24 total characteristics are documented in the Federal Logistics Information System.