An enclosure for a portable computing device is disclosed. The enclosure includes a top case and a bottom case. The bottom case includes a retention feature that receives a snap member. The top case includes a tapered protrusion that is received by the snap member in order to secure the top case to the bottom case. Other features may be included. For example, the retention feature may also receive a tab member that secures the snap member to the retention feature. The retention feature and the tapered protrusion allow for alternate securing means between the top case and the bottom case. As a result, fewer fasteners are required to secure the top case with the bottom case.