NSN 2990-01-646-4026 — this item is cataloged by the U.S. Government under National Stock Number 2990-01-646-4026. Manufacturer of record part number: 3S-1750.
The Housing,spark Arrester,exhaust, cataloged under National Stock Number 2990-01-646-4026, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Maradyne Corporation. Government technical data includes 1 specification, 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. Current acquisition status: Active.
Other items in FSC 2990 — Miscellaneous Engine Accessories, Nonaircraft
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
2990-00-001-0001
BLOWER ASSEMBLY
2990-00-001-1248
2990-00-001-1248 · Item name not on file
2990-00-001-1250
2990-00-001-1250 · Item name not on file
2990-00-001-2055
2990-00-001-2055 · Item name not on file
2990-00-001-3498
2990-00-001-3498 · Item name not on file
2990-00-001-3520
2990-00-001-3520 · Item name not on file
2990-00-001-3521
2990-00-001-3521 · Item name not on file
2990-00-001-3522
CAP ASSEMBLY,MUFFLE
Frequently Asked Questions
What is NSN 2990-01-646-4026?
NSN 2990-01-646-4026 is a Housing,spark Arrester,exhaust, manufactured by Maradyne Corporation, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
What part numbers are listed for NSN 2990-01-646-4026?
NSN 2990-01-646-4026 has 1 manufacturer part number on file: 3S-1750 (Maradyne Corporation).
What are the specifications of 3S-1750?
Key specifications for 3S-1750: Overall Diameter: 1.75 INCHES NOMINAL IN; Part Name Assigned by Controlling Agency: ADAPTER; End Item Identification: SPARK ARRESTER MUFFLER. 1 specification is documented in the U.S. Government catalog.
Is NSN 2990-01-646-4026 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.