The Adjusting Device,belt-Chain Tension, cataloged under National Stock Number 2990-01-643-3604, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. Current acquisition status: Active.
This page shows the U.S. Government catalog record for NSN 2990-01-643-3604 as we hold it. The record gives the stock number, the item name (Adjusting Device,belt-Chain Tension), its supply class (FSC 2990, Miscellaneous Engine Accessories, Nonaircraft) and its status (active). It lists no specifications, no manufacturer and no manufacturer part numbers. We show what the record contains and nothing more. If you know this part by a manufacturer's part number, search for that number instead.
| Item Name | Adjusting Device,belt-Chain Tension |
| FSC / FSG | 2990 — Miscellaneous Engine Accessories, Nonaircraft (FSG 29) |
| Parameter | Value |
|---|---|
| NSN | 2990-01-643-3604 |
| Item Name | Adjusting Device,belt-Chain Tension |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 2990-01-643-3604 is a Adjusting Device,belt-Chain Tension, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
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.