The Cylinder Assembly,hydraulic Brak, cataloged under National Stock Number 1630-01-390-6745, is classified within Federal Supply Class 1630 (Aircraft Wheel and Brake Systems) of the Aircraft Components and Accessories group. The manufacturer of record is Avox Systems Inc Dba Avox Systems Inc. Government technical data includes 4 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1630-01-390-6745 |
| Primary Part Number | 4500S-A2 |
| Item Name | Cylinder Assembly,hydraulic Brak |
| FSC / FSG | 1630 / 16 — Aircraft Wheel and Brake Systems |
| Manufacturer | Avox Systems Inc Dba Avox Systems Inc |
| Status | ACTIVE |
| Port Thread Series Designator | UNF LOCATION NOT OTHERWISE SPECIFIED |
| Port Thread Quantity Per Inch | 20 LOCATION NOT OTHERWISE SPECIFIED |
| Port Thread Diameter | 0.4375 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN |
| Port Location and Quantity | 1 CENTER SECTION AND 1 PISTON ROD END |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 9638010110 | Pilatus Aircraft Ltd (CHE) |
| 4500S-A2 PRIMARY | Avox Systems Inc Dba Avox Systems Inc (USA) |
NSN 1630-01-390-6745 is a Cylinder Assembly,hydraulic Brak, manufactured by Avox Systems Inc Dba Avox Systems Inc, classified under FSC 1630, Aircraft Wheel and Brake Systems. Status: active.
NSN 1630-01-390-6745 has 2 manufacturer part numbers on file: 9638010110 (Pilatus Aircraft Ltd), 4500S-A2 (Avox Systems Inc Dba Avox Systems Inc).
Key specifications for 4500S-A2: Port Thread Series Designator: UNF LOCATION NOT OTHERWISE SPECIFIED; Port Thread Quantity Per Inch: 20 LOCATION NOT OTHERWISE SPECIFIED; Port Thread Diameter: 0.4375 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN; Port Location and Quantity: 1 CENTER SECTION AND 1 PISTON ROD END. 4 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.
NSN 1630-01-390-6745 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.