99-4643-00-19, which refers to a Binder M23 Male Cable Connector from the 623 Series:

Technical Specifications

• Connector Type: M23 Male Cable Connector
• Series: Binder 623
• Number of Contacts: 19 total (typically 16 signal + 3 power)
• Termination Method: Solder
• Cable Diameter Range: 6.0–10.0 mm
• Shielding: Shieldable (requires separate earthing sleeves with seal)
• Rated Current: 8A (signal), 10A (power)
• Rated Voltage: 150V
• Contact Plating: Gold-plated for enhanced conductivity and corrosion resistance
• Ingress Protection: IP67 (dust-tight and protected against immersion)
• Operating Temperature: 20°C to +125°C
• Mating Cycles: 50
• Locking System: Threaded coupling
• Pollution Degree: 3 (suitable for industrial environments)