The Piston,hydraulic Brake, cataloged under National Stock Number 1630-01-303-4670, is classified within Federal Supply Class 1630 (Aircraft Wheel and Brake Systems) of the Aircraft Components and Accessories group. The manufacturer of record is Hornet Acquisitionco, Llc Dba Onboard Systems. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1630-01-303-4670 |
| Primary Part Number | 42420-78 |
| Item Name | Piston,hydraulic Brake |
| FSC / FSG | 1630 / 16 — Aircraft Wheel and Brake Systems |
| Manufacturer | Hornet Acquisitionco, Llc Dba Onboard Systems |
| Status | ACTIVE |
| Material | STEEL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 42420-78 PRIMARY | Hornet Acquisitionco, Llc Dba Onboard Systems (USA) |
| Reference | Meaning |
|---|---|
| 42420-78 | 5/9 Secondary reference U.S. Government activity |
| 42420-78 | 5/9 Secondary reference Goodrich Corporation Dba Trw Lucas Aerospace |
NSN 1630-01-303-4670 is a Piston,hydraulic Brake, manufactured by Hornet Acquisitionco, Llc Dba Onboard Systems, classified under FSC 1630, Aircraft Wheel and Brake Systems. Status: active.
NSN 1630-01-303-4670 has 1 manufacturer part number on file: 42420-78 (Hornet Acquisitionco, Llc Dba Onboard Systems).
Key specifications for 42420-78: End Item Identification: 1680012319750,WINCH BRAKE ASSY; Material: STEEL. 1 specification is 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 1630-01-303-4670 has DEMIL Code Q. 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.