The Muffler,exhaust, cataloged under National Stock Number 2990-01-220-6995, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Walker Mfg Co. Government technical data includes 11 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 2990-01-220-6995 |
| Primary Part Number | 22155 |
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Walker Mfg Co |
| Status | ACTIVE |
| Operating Position | HORIZONTAL |
| Coolant Type | AIR |
| Design Type | DRY |
| Overall Diameter | 6.000 INCHES NOMINAL IN |
| Outlet Inside Diameter | 2.000 INCHES NOMINAL FIRST OUTLET IN |
| Inlet Projection Length | 2.000 INCHES NOMINAL SINGLE INLET IN |
| Inlet Connection Type | UNTHREADED SINGLE INLET |
| Body Shape | ROUND |
| Inlet Inside Diameter | 2.250 INCHES NOMINAL SINGLE INLET IN |
| Outlet Connection Type | UNTHREADED FIRST OUTLET |
| Outlet Location | OFFSET 1.500 IN.FROM CENTERLINE OF BODY TO CENTERLINE OF OUTLET CONNECTION. IN |
| 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 |
|---|---|
| 22155 PRIMARY | Walker Mfg Co (USA) |
| Reference | Meaning |
|---|---|
| 22155 | 5/9 Secondary reference Ford Motor Co Ford Parts and Service Div Government Part Sales |
| 22155 | 5/9 Secondary reference Ford Motor Company |
NSN 2990-01-220-6995 is a Muffler,exhaust, manufactured by Walker Mfg Co, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-01-220-6995 has 1 manufacturer part number on file: 22155 (Walker Mfg Co).
3 possible matches (shared part number, not a government interchangeability claim): 3110-01-320-9375, 3750-01-608-1094, 1095-01-678-8246. Verify interchangeability with system specifications before substitution.
Key specifications for 22155: Operating Position: HORIZONTAL; Coolant Type: AIR; Design Type: DRY; Overall Diameter: 6.000 INCHES NOMINAL IN. 11 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.