The Sleeve,adapter Assembly, cataloged under National Stock Number 2520-00-080-6977, 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 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2520-00-080-6977 |
| Primary Part Number | 6775520 |
| Item Name | Sleeve,adapter Assembly |
| FSC / FSG | 2520 / 25 — Vehicular Power Transmission Components |
| Manufacturer | Allison Transmission Inc Dba Allison Transmission, Inc |
| Status | ACTIVE |
| General Characteristics Item Description | 3.750 IN. ID,4.000 IN. OD W/5/32 IN. BY 30 DEG CHAMFER,2 HOLES 0.234 IN. DIA 180 DEG APART,0.953 IN. THK 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 |
|---|---|
| 6775520 PRIMARY | Allison Transmission Inc Dba Allison Transmission, Inc (USA) |
| Reference | Meaning |
|---|---|
| 6775520 | 5/9 Secondary reference Detroit Diesel (overseas Distribution Corp) |
| 6775520 | 5/9 Secondary reference General Motors Corp |
NSN 2520-00-080-6977 is a Sleeve,adapter Assembly, manufactured by Allison Transmission Inc Dba Allison Transmission, Inc, classified under FSC 2520, Vehicular Power Transmission Components. Status: active.
NSN 2520-00-080-6977 has 1 manufacturer part number on file: 6775520 (Allison Transmission Inc Dba Allison Transmission, Inc).
Key specifications for 6775520: General Characteristics Item Description: 3.750 IN. ID,4.000 IN. OD W/5/32 IN. BY 30 DEG CHAMFER,2 HOLES 0.234 IN. DIA 180 DEG APART,0.953 IN. THK 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.