The Adjusting Device,belt-Chain Tens, cataloged under National Stock Number 2990-01-598-7539, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Dayco Products Llc. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Adjusting Device,belt-Chain Tens |
| FSC / FSG | 2990 — Miscellaneous Engine Accessories, Nonaircraft (FSG 29) |
| Manufacturers | Dayco Products Llc (CAGE 11288); Caterpillar Inc Div Caterpillar Defense (CAGE 11083) |
| Parameter | Value |
|---|---|
| NSN | 2990-01-598-7539 |
| Primary Part Number | 25702-01 |
| Item Name | Adjusting Device,belt-Chain Tens |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Dayco Products Llc |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 25702-01 PRIMARY | Dayco Products Llc (USA) |
| 253-1864 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
| Reference | Meaning |
|---|---|
| 24448-01 | 5/9 Secondary reference Dayco Products Llc |
| 2990PL1650164 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 3823690 | 7/9 Vendor item drawing reference Oshkosh Corp |
| 3823690 | 7/2 Vendor item drawing reference Oshkosh Defense Llc |
NSN 2990-01-598-7539 is a Adjusting Device,belt-Chain Tens, manufactured by Dayco Products Llc, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-01-598-7539 has 2 manufacturer part numbers on file: 25702-01 (Dayco Products Llc), 253-1864 (Caterpillar Inc Div Caterpillar Defense).
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.