Uses: Used for connection and communication of electric vehicle lubrication, cooling and other pipeline systems, also known as pipe joints, a special high-precision pipeline connector, similar to common hydraulic and gas pipeline fittings; Features: It is a special high-precision connection pipe fitting, similar to common hydraulic and gas pipeline fittings; Generally, there are special pipeline interfaces at both ends, and the middle six or eight edges are used for fixing and locking, which requires high appearance and strength. Process requirements: blank is generally made of stainless steel casting, the main process includes: turning process; the main processing equipment has CNC lathe equipment. Key inspection items: appearance, thread, size and other items; special stop gauge is adopted for thread inspection, with fewer inspection items and inspection instruments.