The Piston,lockup Clutch, cataloged under National Stock Number 2520-00-562-0069, is classified within Federal Supply Class 2520 (Vehicular Power Transmission Components) of the Vehicular Equipment Components group. The manufacturer of record is Allison Transmission Inc Dba Allison Transmission, Inc. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 2520-00-562-0069 |
| Primary Part Number | 6766346 |
| Item Name | Piston,lockup Clutch |
| FSC / FSG | 2520 / 25 — Vehicular Power Transmission Components |
| Manufacturer | Allison Transmission Inc Dba Allison Transmission, Inc |
| Status | ACTIVE |
| General Characteristics Item Description | MATL STEEL,MIL-S-13048,COMP 4140 OR SAE 4140,ROCKWELL HARDNESS C 26-32,3 HOLES 0.812 IN. DIA EQUALLY SPACED ON 16.766 IN. BOLT CIRCLE,CENTER HOLE 1.375 IN. DIA,12.484 IN. ID,18.6515 IN. OD,1.380 IN. H,POLISHED FINISH 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 |
|---|---|
| 7708728 | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| 6766346 PRIMARY | Allison Transmission Inc Dba Allison Transmission, Inc (USA) |
| 7708728 | Allison Transmission Inc Dba Allison Transmission, Inc (USA) |
| Reference | Meaning |
|---|---|
| 6766346 | 5/9 Secondary reference General Motors Corp |
NSN 2520-00-562-0069 is a Piston,lockup Clutch, manufactured by Allison Transmission Inc Dba Allison Transmission, Inc, classified under FSC 2520, Vehicular Power Transmission Components. Status: active.
NSN 2520-00-562-0069 has 3 manufacturer part numbers on file: 7708728 (U S Army Tank Automotive Command Amsta-Im-Mm), 6766346 (Allison Transmission Inc Dba Allison Transmission, Inc), 7708728 (Allison Transmission Inc Dba Allison Transmission, Inc).
Key specifications for 6766346: General Characteristics Item Description: MATL STEEL,MIL-S-13048,COMP 4140 OR SAE 4140,ROCKWELL HARDNESS C 26-32,3 HOLES 0.812 IN. DIA EQUALLY SPACED ON 16.766 IN. BOLT CIRCLE,CENTER HOLE 1.375 IN. DIA,12.484 IN. ID,18.6515 IN. OD,1.380 IN. H,POLISHED FINISH 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.