High Performance Miniature Circular Connectors The snap lock allows for easy insertion and removal and prevents accidental connector disengagement due to vibration or impact. The diameter of the plug varies from 12 mm in diameter. to 16mm diameter and meets the need for small size, light weight and high density electronic components. Equipped with internal metal parts and a shielding mechanism, the HR12 (20 contacts) and HR212 feature enhanced EMI protection. The snap lock allows for easy insertion and removal and prevents accidental connector disengagement due to vibration or impact. The plug diameter ranges from Ø12mm to Ø16mm and meets the need for electronic components with small size, light weight and high density. Equipped with internal metal parts and a shielding mechanism, the HR12 (20 contacts) and HR212 feature enhanced EMI protection.