These plugs seal bore holes with and without thread, and cover the surrounding surface at the same time. The integration of plug and flange in one unit redundantizes time-consuming cover operations consisting of two worksteps. Silicone is long-term heat resistant at dry heat up to approx. +200°C, temporarily up to approx. +300°C. Flexible at cold temperatures down to approx. -60°C. Recommended for powder coating, paintwork, plating and anodising. Reusable! G1 = for metric bores G2 = for UNF bores (inch) G3 = for BSP bores (inch)