Ultrasonic Bolt:Connect ultrasonic transducer and booster,horn Ultrasonic Bolt1.Standard:DIN931/DIN933/GB5783/GB5782.etc2.Metail:Carbon steel,stainless steel.3.Size:M5-M36.4.Standards:DIN ,ANSI/ASME,BS,GB,JIS,Non-standard5.Surface:plain,zinc plated,black oxide,hot dip galv.etc.