Semiconductor device assemblies include elements such as electronic components and substrates secured together by a fastener that includes an elongated portion extending continuously through an aperture in two or more such elements. Computer systems include such semiconductor device assemblies. Fasteners for securing together such elements include an elongated portion, a first end piece, and a second end piece. Methods of securing together a plurality of semiconductor devices include inserting an elongated portion of a fastener through an aperture in a first semiconductor device and an aperture in at least one additional semiconductor device. Circuit boards include a plurality of apertures disposed in an array corresponding to an array of apertures in a semiconductor device assembly. Each aperture is sized and configured to receive a fastener for maintaining an assembled relationship between the semiconductor device assembly and the circuit board.