Collar Flanges with Retaining Ring ISO-K - DIN 2501 offer a reliable and secure connection for your ISO-K flange systems. Designed for precision and durability, these flanges feature a retaining ring that enhances safety by preventing disconnections. Easy to install and maintain, they are ideal for both new and upgraded vacuum setups. Upgrade your flange system with Part Number 86751V01 for improved performance and integrity.