A wellhead assembly has a tubular wellhead body with a wellhead axial bore and a wellhead radial bore. A hanger has a hanger axial bore and a hanger radial port. A tube moving mechanism moves a tube in the wellhead radial bore between a retracted position, an intermediate position and an extended position. The tube has an inner end that is recessed in the wellhead radial bore while in the retracted position, that protrudes a first distance into the wellhead axial bore while in the intermediate position, and which protrudes a second distance into engagement with the hanger radial port while in the extended position. A landing shoulder on the hanger above the radial port lands on an inner portion of the tube while the tube is in the intermediate position.