A production assembly for controlling production from a well includes a wellhead and a tubing hanger assembly. The wellhead includes a bore formed through the wellhead with a first groove and a second groove each extending into the wellhead and axially spaced apart from each other. The tubing hanger assembly is installable in the wellhead and includes a load segment expandable into engagement with the first groove to support the tubing hanger assembly within the wellhead and a lock ring expandable into engagement with the second groove to secure the tubing hanger assembly within the wellhead.