The Cylinder Assembly,hydraulic Brak, cataloged under National Stock Number 2530-00-366-8403, is classified within Federal Supply Class 2530 (Vehicular Brake, Steering, Axle, Wheel, and Track Components) of the Vehicular Equipment Components group. The manufacturer of record is General Motors Llc Dba General Motors Llc. Government technical data includes 5 specifications, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 2530-00-366-8403 |
| Primary Part Number | 2620638 |
| Item Name | Cylinder Assembly,hydraulic Brak |
| FSC / FSG | 2530 / 25 — Vehicular Brake, Steering, Axle, Wheel, and Track Components |
| Manufacturer | General Motors Llc Dba General Motors Llc |
| Status | ACTIVE |
| Mounting Facility Diameter | 0.344 INCHES NOMINAL IN |
| Center to Center Distance Between Mounting Provisions | 2.625 INCHES NOMINAL IN |
| Design Characteristics | SINGLE ACTING SINGLE CYLINDER |
| Mounting Provision Arrangement Style | TWO HOLE |
| Mounting Provision | UNTHREADED MOUNTING HOLES |
| 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 |
|---|---|
| 2620638 PRIMARY | General Motors Llc Dba General Motors Llc (USA) |
| Reference | Meaning |
|---|---|
| 2620638 | 5/9 Secondary reference General Motors Corp Chevrolet Motor Div Special Products Dept |
NSN 2530-00-366-8403 is a Cylinder Assembly,hydraulic Brak, manufactured by General Motors Llc Dba General Motors Llc, classified under FSC 2530, Vehicular Brake, Steering, Axle, Wheel, and Track Components. Status: active.
NSN 2530-00-366-8403 has 1 manufacturer part number on file: 2620638 (General Motors Llc Dba General Motors Llc).
Key specifications for 2620638: Mounting Facility Diameter: 0.344 INCHES NOMINAL IN; Overall Height: 5.750 INCHES NOMINAL IN; Center to Center Distance Between Mounting Provisions: 2.625 INCHES NOMINAL IN; Design Characteristics: SINGLE ACTING SINGLE CYLINDER. 5 specifications are 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.