The Muffler,intake, cataloged under National Stock Number 2990-01-618-6212, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Derbyshire Machine & Tool Co. Government technical data includes 2 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-01-618-6212 |
| Primary Part Number | 20-D-013 |
| Item Name | Muffler,intake |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Derbyshire Machine & Tool Co |
| Status | ACTIVE |
| Overall Diameter | 14.710 INCHES MINIMUM AND 14.760 INCHES MAXIMUM IN |
| Body Shape | RECTANGULAR |
| 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-D-013 | Derbyshire Machine & Tool Co (USA) |
| Reference | Meaning |
|---|---|
| DM123866 | D/9 Drawing number reference only U.S. Government activity |
| DM123866-ASSY-C2 | 3/2 Design control — primary reference U.S. Government activity |
NSN 2990-01-618-6212 is a Muffler,intake, manufactured by Derbyshire Machine & Tool Co, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-01-618-6212 has 1 manufacturer part number on file: 20-D-013 (Derbyshire Machine & Tool Co).
Key specifications for 20-D-013: Overall Diameter: 14.710 INCHES MINIMUM AND 14.760 INCHES MAXIMUM IN; Overall Length: 10.526 INCHES MINIMUM AND 10.576 INCHES MAXIMUM IN; Overall Width: 35.405 INCHES MINIMUM AND 35.455 INCHES MAXIMUM IN; Body Shape: RECTANGULAR. 2 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.