Liquid nitrogen deflashing of O-rings is a cryogenic finishing technique that uses extreme low temperatures (-196°C) to embrittle and remove flash from rubber seals. By lowering the rubber below its glass transition temperature, the flash becomes brittle and is easily removed through tumbling or shot blasting. This process provides cleaner edges, improved surface finishes, and precise tolerance control compared to traditional trimming. With high efficiency and cost-effectiveness, liquid nitrogen deflashing is widely adopted in rubber seal manufacturing to deliver superior quality O-rings at large production volumes.