A housing comprises at least first and second portions. The first and second portions mate with each other at respective joining regions. The first and second portions each comprise a respective tapered flange along the joining region. The first and second portions of the housing are connected to each other by placing a plurality of collars over the tapered flanges of the first and second portions of the housing. Each of the collars has a respective groove formed therein. The grooves of the plurality of collars are placed over the tapered flanges of the first and second portions of the housing. A plurality of fasteners causes the plurality of collars to press the first and second portions of the housing together. In one embodiment, the housing is used in a sensor block assembly that is part of an inertial measurement unit.