The Coupling,reducer, cataloged under National Stock Number 2815-00-920-8262, is classified within Federal Supply Class 2815 (Diesel Engines and Components) of the Engines, Turbines, and Components group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2815-00-920-8262 |
| Primary Part Number | 2S5551 |
| Item Name | Coupling,reducer |
| FSC / FSG | 2815 / 28 — Diesel Engines and Components |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| General Characteristics Item Description | CAST IRON,3.870 IN. OD ONE END,4.620 IN. OD ON OTHER END,BOTH ENDS WITH CIRCULAR GROOVE TO ACCOMMODATE METAL SEAL RING,3.360 IN. OVERALL LG IN |
| 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 |
|---|---|
| 2S5551 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
| Reference | Meaning |
|---|---|
| IPD2S5551 | 5/9 Secondary reference Industrial Parts Depot, Llc Dba Ipd |
NSN 2815-00-920-8262 is a Coupling,reducer, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 2815, Diesel Engines and Components. Status: active.
NSN 2815-00-920-8262 has 1 manufacturer part number on file: 2S5551 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 2S5551: General Characteristics Item Description: CAST IRON,3.870 IN. OD ONE END,4.620 IN. OD ON OTHER END,BOTH ENDS WITH CIRCULAR GROOVE TO ACCOMMODATE METAL SEAL RING,3.360 IN. OVERALL LG IN. 1 specification is 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.