The Arrester,spark Exhaust, cataloged under National Stock Number 2990-01-106-4229, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. Government technical data includes 18 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-01-106-4229 |
| Item Name | Arrester,spark Exhaust |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Status | ACTIVE |
| Inlet Flange Shape | ROUND LOCATION NOT OTHERWISE SPECIFIED |
| Operating Position | UNIVERSAL |
| Inlet Location | CENTRALLY LOCATED IN END SECTION OF BODY |
| Outlet Flange Mounting Provision and Quantity | 8 HOLES LOCATION NOT OTHERWISE SPECIFIED |
| Overall Diameter | 22.000 INCHES NOMINAL IN |
| Inlet Projection Length | 3.000 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN |
| Inlet Flange Mounting Hole Diameter | 0.875 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN |
| Outlet Flange Shape | ROUND LOCATION NOT OTHERWISE SPECIFIED |
| Inlet Connection Type | FLANGE LOCATION NOT OTHERWISE SPECIFIED |
| Body Shape | ROUND |
| Inlet Flange Mounting Provision and Quantity | 8 HOLES LOCATION NOT OTHERWISE SPECIFIED |
| Surface Treatment | STD000 |
| Outlet Flange Mounting Hole Diameter | 0.875 INCHES NOMINAL IN |
| Material | STEEL |
| Outlet Projection Length | 3.000 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN |
| Device Design Type | BAFFLE |
| Outlet Connection Type | FLANGE LOCATION NOT OTHERWISE SPECIFIED |
| Outlet Location | CENTRALLY LOCATED IN END SECTION OF BODY |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| MSA1-8 | 5/9 Secondary reference Beaird Industries Inc. |
| MSA1-8 | 3/9 Design control — primary reference Maxco, Llc Dba Maxim Silencers |
NSN 2990-01-106-4229 is a Arrester,spark Exhaust, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
Key specifications for 2990-01-106-4229: Inlet Flange Shape: ROUND LOCATION NOT OTHERWISE SPECIFIED; Operating Position: UNIVERSAL; Inlet Location: CENTRALLY LOCATED IN END SECTION OF BODY; Outlet Flange Mounting Provision and Quantity: 8 HOLES LOCATION NOT OTHERWISE SPECIFIED. 18 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.