An apparatus comprising: a fastener comprising: a shaft having a longitudinal axis and a first and second threaded portions, wherein the first and second threaded portions (310, 312) are separated by a central portion being a single cylindrical portion, the single cylindrical portion comprising a single reduced diameter that is less than a first diameter of the first threaded portion and a second diameter of the second threaded portion, wherein the first and second threaded portions (310, 312) are chamfered to reduce friction on leading threads (320, 322); wherein the fastener comprises a material that has a tensile strength along the longitudinal axis that is greater than a shear strength at the single cylindrical portion; and first, second and third components fastened together with the fastener, wherein: the first and third components are fastened with the first and second threaded portions (310, 312), or one or more nuts attached thereto; and the second component is positioned around the central portion, wherein the fastener provides a clearance between the second component and the central portion of the fastener. a fastener comprising: a shaft having a longitudinal axis and a first and second threaded portions, wherein the first and second threaded portions (310, 312) are separated by a central portion being a single cylindrical portion, the single cylindrical portion comprising a single reduced diameter that is less than a first diameter of the first threaded portion and a second diameter of the second threaded portion, wherein the first and second threaded portions (310, 312) are chamfered to reduce friction on leading threads (320, 322); wherein the fastener comprises a material that has a tensile strength along the longitudinal axis that is greater than a shear strength at the single cylindrical portion; and a shaft having a longitudinal axis and a first and second threaded portions, wherein the first and second threaded portions (310, 312) are separated by a central portion being a single cylindrical portion, the single cylindrical portion comprising a single reduced diameter that is less than a first diameter of the first threaded portion and a second diameter of the second threaded portion, wherein the first and second threaded portions (310, 312) are chamfered to reduce friction on leading threads (320, 322); wherein the fastener comprises a material that has a tensile strength along the longitudinal axis that is greater than a shear strength at the single cylindrical portion; and first, second and third components fastened together with the fastener, wherein: the first and third components are fastened with the first and second threaded portions (310, 312), or one or more nuts attached thereto; and the second component is positioned around the central portion, wherein the fastener provides a clearance between the second component and the central portion of the fastener. the first and third components are fastened with the first and second threaded portions (310, 312), or one or more nuts attached thereto; and the second component is positioned around the central portion, wherein the fastener provides a clearance between the second component and the central portion of the fastener.