NSN 2990-01-643-3949 — this item is cataloged by the U.S. Government under National Stock Number 2990-01-643-3949. Manufacturer of record part number: 21826866.
The Adjusting Device,belt-Chain Tens, cataloged under National Stock Number 2990-01-643-3949, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Volvo Penta of the Americas Inc. The record lists 3 manufacturer part numbers 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 2990-01-643-3949?
NSN 2990-01-643-3949 is a Adjusting Device,belt-Chain Tens, manufactured by Volvo Penta of the Americas Inc, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
What part numbers are listed for NSN 2990-01-643-3949?
NSN 2990-01-643-3949 has 3 manufacturer part numbers on file: 21826866 (Volvo Penta of the Americas Inc), 21826866 (Volvo Penta of the Americas, Llc), 21826866 (Aktiebolaget Volvo Penta).
What are the specifications of 21826866?
Key specifications for 21826866: Special Features: D3-110I 110HP; Part Name Assigned by Controlling Agency: BELT,TENSIONER; End Item Identification: ENGINE,DIESEL. 0 specifications are documented in the U.S. Government catalog.
Is NSN 2990-01-643-3949 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.