The Cylinder,hydraulic Brake,master, cataloged under National Stock Number 1630-00-706-9301, is classified within Federal Supply Class 1630 (Aircraft Wheel and Brake Systems) of the Aircraft Components and Accessories group. The manufacturer of record is De Havilland Aircraft of Canada Limited. Government technical data includes 11 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 1630-00-706-9301 |
| Primary Part Number | C2CF3331A |
| Item Name | Cylinder,hydraulic Brake,master |
| FSC / FSG | 1630 / 16 — Aircraft Wheel and Brake Systems |
| Manufacturer | De Havilland Aircraft of Canada Limited |
| Status | ACTIVE |
| Actuation Method | DIRECT |
| Port Thread Series Designator | UNF LOCATION NOT OTHERWISE SPECIFIED |
| Port Thread Class | 3B LOCATION NOT OTHERWISE SPECIFIED |
| Port Thread Quantity Per Inch | 20 LOCATION NOT OTHERWISE SPECIFIED |
| Port Thread Diameter | 0.438 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN |
| Port Location and Quantity | 2 CYLINDER HEAD END |
| Port Style | GASKET SEAL LOCATION NOT OTHERWISE SPECIFIED |
| Bore Diameter | 0.9375 INCHES NOMINAL IN |
| Material | COPPER ALLOY BODY |
| Mounting Type and Location | TONGUE CYLINDER HEAD END |
| Reservoir Type | INTEGRAL |
| 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 |
|---|---|
| C2CF3331A PRIMARY | De Havilland Aircraft of Canada Limited (CAN) |
| Reference | Meaning |
|---|---|
| 1630U6-257-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 1630-00-706-9301 is a Cylinder,hydraulic Brake,master, manufactured by De Havilland Aircraft of Canada Limited, classified under FSC 1630, Aircraft Wheel and Brake Systems. Status: active.
NSN 1630-00-706-9301 has 1 manufacturer part number on file: C2CF3331A (De Havilland Aircraft of Canada Limited).
Key specifications for C2CF3331A: Actuation Method: DIRECT; Port Thread Series Designator: UNF LOCATION NOT OTHERWISE SPECIFIED; Port Thread Class: 3B LOCATION NOT OTHERWISE SPECIFIED; Port Thread Quantity Per Inch: 20 LOCATION NOT OTHERWISE SPECIFIED. 11 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.