The Cylinder,hydraulic Brake,master, cataloged under National Stock Number 2530-01-060-9283, 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 15 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2530-01-060-9283 |
| Primary Part Number | 18002458 |
| Item Name | Cylinder,hydraulic Brake,master |
| FSC / FSG | 2530 / 25 — Vehicular Brake, Steering, Axle, Wheel, and Track Components |
| Manufacturer | General Motors Llc Dba General Motors Llc |
| Status | ACTIVE |
| Actuation Method | DIRECT |
| Mounting Facility Diameter | 0.406 INCHES NOMINAL IN |
| Center to Center Distance Between Mounting Provisions | 3.375 INCHES NOMINAL IN |
| Seat Angle in Deg | 37.0 SINGLE PORT |
| Port Thread Series Designator | UNF SINGLE PORT |
| Mounting Provision Arrangement Style | TWO HOLE |
| Port Thread Class | 2B SINGLE PORT |
| Port Thread Quantity Per Inch | 18 SINGLE PORT |
| Port Thread Diameter | 0.562 INCHES NOMINAL SINGLE PORT IN |
| Port Location and Quantity | 2 CENTER SECTION |
| Port Style | INVERTED FLARE SINGLE PORT |
| Material | STEEL BODY |
| Mounting Type and Location | FLANGE PISTON ROD END |
| Reservoir Type | INTEGRAL |
| 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 |
|---|---|
| 18002458 PRIMARY | General Motors Llc Dba General Motors Llc (USA) |
| Reference | Meaning |
|---|---|
| 174-516 | 5/9 Secondary reference General Motors Corp Delco Electronics Div |
| 1730 | 5/9 Secondary reference Allied Automotive Allied Aftermarket Div |
| 18002458 | 5/9 Secondary reference General Motors Corp Chevrolet Motor Div Special Products Dept |
| 174-516 | 5/9 Secondary reference Delco Moraine Div of General Motors Corp |
| 18002458 | C/1 Advisory reference — outside the item-of-supply concept Military Vehicles Opn General Motors Truck and Bus Group Ms 2603-02 |
| E101266 | 5/9 Secondary reference U.S. Government activity |
NSN 2530-01-060-9283 is a Cylinder,hydraulic Brake,master, manufactured by General Motors Llc Dba General Motors Llc, classified under FSC 2530, Vehicular Brake, Steering, Axle, Wheel, and Track Components. Status: active.
NSN 2530-01-060-9283 has 1 manufacturer part number on file: 18002458 (General Motors Llc Dba General Motors Llc).
Key specifications for 18002458: Actuation Method: DIRECT; Mounting Facility Diameter: 0.406 INCHES NOMINAL IN; Overall Height: 5.125 INCHES NOMINAL IN; Center to Center Distance Between Mounting Provisions: 3.375 INCHES NOMINAL IN. 15 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.