The Cylinder,hydraulic Brake,master, cataloged under National Stock Number 2530-01-045-3633, is classified within Federal Supply Class 2530 (Vehicular Brake, Steering, Axle, Wheel, and Track Components) of the Vehicular Equipment Components group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2530-01-045-3633 |
| Item Name | Cylinder,hydraulic Brake,master |
| FSC / FSG | 2530 / 25 — Vehicular Brake, Steering, Axle, Wheel, and Track Components |
| Status | ACTIVE |
| Actuation Method | DIRECT |
| Mounting Facility Diameter | 0.375 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 | 1 CENTER SECTION |
| Port Style | INVERTED FLARE SINGLE PORT |
| Material | STEEL BODY |
| Mounting Type and Location | FLANGE CENTER SECTION |
| 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 |
| Reference | Meaning |
|---|---|
| 2623214 | 5/9 Secondary reference General Motors Corp Chevrolet Motor Div Special Products Dept |
| 5472542 | 5/9 Secondary reference Delco Moraine Div of General Motors Corp |
| 36329 | C/1 Advisory reference — outside the item-of-supply concept Tvh Parts Co. |
| 39075 | C/1 Advisory reference — outside the item-of-supply concept Tvh Parts Co. |
| 39075 | 3/9 Design control — primary reference Lift Parts Mfg Co Inc Div of Echlin Mfg Co the |
| 36329 | 5/9 Secondary reference Lift Parts Mfg Co Inc Div of Echlin Mfg Co the |
NSN 2530-01-045-3633 is a Cylinder,hydraulic Brake,master, classified under FSC 2530, Vehicular Brake, Steering, Axle, Wheel, and Track Components. Status: active.
5 possible matches (shared part number, not a government interchangeability claim): 5120-01-106-3756, 4810-01-382-3109, 3020-01-419-6425. Verify interchangeability with system specifications before substitution.
Key specifications for 2530-01-045-3633: Actuation Method: DIRECT; Mounting Facility Diameter: 0.375 INCHES NOMINAL IN; Overall Height: 5.250 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.