Technic Pneumatic Hose Connector with Axle Connector 99021

Connect pneumatic tubing neatly within your LEGO® Technic mechanisms with LEGO® Part 99021 Pneumatic Hose Connector with Axle Connector. This compact functional element combines a pneumatic hose connection with Technic-compatible mounting features, making it useful for routing air lines through machinery, vehicles and custom pneumatic builds.

LEGO® Pneumatic Connector 99021

Part 99021 is designed for integration into LEGO® Technic pneumatic assemblies where secure hose routing and structural connection are needed in the same area. It is particularly useful when rebuilding older mechanisms, replacing missing pneumatic components or designing compact custom systems.

• Part number: 99021
• Part type: Pneumatic hose connector with axle connector
• System: LEGO® Technic pneumatics
• Useful for: Hose routing, pneumatic mechanisms, replacement parts and Technic MOCs
• Build applications: Construction machinery, pneumatic equipment and other air-powered Technic functions

Combine this connector with compatible hoses, pumps, switches and cylinders to expand or repair your pneumatic mechanisms. Browse more specialised components in our LEGO® pneumatic parts collection.