Adapter, with Pg connection thread according to DIN 40430 and metric internal thread according to DIN EN 60423, with knurled collar. External thread: Pg 29 Internal thread: M 25 External thread length: 8 mm Internal thread length: 11.5 mm Outside Ø: 39 mm with connection thread sealing ring 987/...(please order separately!) : IP68 Material: brass, nickel-plated