The Cylinder,hydraulic Brake,master, cataloged under National Stock Number 1630-00-690-6097, is classified within Federal Supply Class 1630 (Aircraft Wheel and Brake Systems) of the Aircraft Components and Accessories group. The manufacturer of record is Triumph Actuation Systems - Connecticut, Llc. Government technical data includes 16 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 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1630-00-690-6097 |
| Primary Part Number | 227501-1 |
| Item Name | Cylinder,hydraulic Brake,master |
| FSC / FSG | 1630 / 16 — Aircraft Wheel and Brake Systems |
| Manufacturer | Triumph Actuation Systems - Connecticut, Llc |
| Status | ACTIVE |
| Actuation Method | DIRECT |
| Seat Angle in Deg | 60.0 LOCATION NOT OTHERWISE SPECIFIED |
| Port Thread Series Designator | UNF LOCATION NOT OTHERWISE SPECIFIED |
| Port Thread Class | 3B LOCATION NOT OTHERWISE SPECIFIED |
| Port Thread Quantity Per Inch | 20 SINGLE PORT |
| Port Thread Quantity Per Inch | 18 ALL PORTS |
| Port Thread Quantity Per Inch | 20 FIRST PORT |
| Port Thread Diameter | 0.437 INCHES NOMINAL SINGLE PORT IN |
| Port Thread Diameter | 0.437 INCHES NOMINAL FIRST PORT IN |
| Port Thread Diameter | 0.562 INCHES NOMINAL ALL PORTS IN |
| Port Location and Quantity | 1 PISTON ROD END |
| Port Location and Quantity | 2 CYLINDER HEAD END |
| Port Style | GASKET SEAL LOCATION NOT OTHERWISE SPECIFIED |
| Bore Diameter | 1.250 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY BODY |
| Mounting Type and Location | FORK CYLINDER HEAD END |
| 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 |
|---|---|
| 227501-1 PRIMARY | Triumph Actuation Systems - Connecticut, Llc (USA) |
NSN 1630-00-690-6097 is a Cylinder,hydraulic Brake,master, manufactured by Triumph Actuation Systems - Connecticut, Llc, classified under FSC 1630, Aircraft Wheel and Brake Systems. Status: active.
NSN 1630-00-690-6097 has 1 manufacturer part number on file: 227501-1 (Triumph Actuation Systems - Connecticut, Llc).
1 possible match (shared part number, not a government interchangeability claim): 5940-00-847-3138. Verify interchangeability with system specifications before substitution.
Key specifications for 227501-1: Actuation Method: DIRECT; Overall Height: 3.000 INCHES NOMINAL IN; Seat Angle in Deg: 60.0 LOCATION NOT OTHERWISE SPECIFIED; Port Thread Series Designator: UNF LOCATION NOT OTHERWISE SPECIFIED. 16 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.