The Synchronizer,transmission, cataloged under National Stock Number 2520-00-855-5262, is classified within Federal Supply Class 2520 (Vehicular Power Transmission Components) of the Vehicular Equipment Components group. The manufacturer of record is General Motors Llc Dba General Motors Llc. 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2520-00-855-5262 |
| Primary Part Number | 3870789 |
| Item Name | Synchronizer,transmission |
| FSC / FSG | 2520 / 25 — Vehicular Power Transmission Components |
| Manufacturer | General Motors Llc Dba General Motors Llc |
| Status | ACTIVE |
| General Characteristics Item Description | STEEL;1.312 IN. O/A H;4.129 IN. MAJOR OD;6 SPLINES IN BORE;1.188 IN. MINOR DIA;1.375 IN. MAJOR DIA IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 3870789 PRIMARY | General Motors Llc Dba General Motors Llc (USA) |
| Reference | Meaning |
|---|---|
| K366-23 | 5/9 Secondary reference Republic Gear Co |
| 3870789 | 5/9 Secondary reference General Motors Corp Chevrolet Motor Div Special Products Dept |
| K377-23B | 5/9 Secondary reference Republic Gear Co |
| 3870789 | 5/9 Secondary reference General Motors Corp |
NSN 2520-00-855-5262 is a Synchronizer,transmission, manufactured by General Motors Llc Dba General Motors Llc, classified under FSC 2520, Vehicular Power Transmission Components. Status: active.
NSN 2520-00-855-5262 has 1 manufacturer part number on file: 3870789 (General Motors Llc Dba General Motors Llc).
Key specifications for 3870789: General Characteristics Item Description: STEEL;1.312 IN. O/A H;4.129 IN. MAJOR OD;6 SPLINES IN BORE;1.188 IN. MINOR DIA;1.375 IN. MAJOR DIA IN. 1 specification is documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.