KD65 internal buckle interface KD80 internal buckle interface KD65 copper KYKA80Z same type interface different type interface KD100 German high pressure self-locking interface 135 internal 100 thread 65 male to 80 female interface 165 male to 65 female interface 65 female to 80 female interface 65 female tube thread KYK8OZ KYK65Z KYK65Z/ KYKA80Z KYK80ZZ/KY65