Aerotec Couplings & Connectors Pneumatic safety connector 622816 - Aerotec 2005309, Aerotec's pneumatic safety connector 2005309 is a key compressor accessory. It enhances safety by securely connecting compressor components. This is typically used in pneumatic systems to prevent accidental disconnections. Aerotec 2005309 Pneumatic Safety Connector Durable 1 piece