An apparatus comprising: a longitudinal member connectable with a bone portion; a fastener having a longitudinal axis and engageable with the bone portion to connect said longitudinal member to the bone portion; a housing having a first passage configured to receive said longitudinal member, said housing having a second passage with a longitudinal axis extending transverse to said first passage said second passage having a first diameter, said fastener extending through an opening in said housing into said second passage and being movable relative to said housing, said longitudinal axis of said fastener being positionable in any one of a plurality of angular positions relative to said longitudinal axis of said second passage; a spacer received in said second passage of said housing and engageable with said fastener and said longitudinal member, said spacer having a first radial outer cylindrical surface having an outer diameter smaller than said first diameter of said second passage in the housing, and said spacer further including a second radial outer cylindrical surface having a diameter smaller than the first outer cylindrical surface and a radially extending surface extending between said first and second outer cylindrical surfaces (567, 568); a retaining portion having a radially inner cylindrical surface with a second diameter slightly greater than an outside diameter of the second radial outer cylindrical surface on the spacer, the retaining portion being press-fit into the second passage, the retaining portion being deformable relative to the second passage to adjust the distance between said retaining structure and the radially extending surface of the spacer; a positioning member disposed between the retaining structure and the spacer, the positioning member applies an axial force to the spacer to prevent relative movement between said fastener and said housing when said longitudinal member is disengaged from said spacer and said spacer engages said fastener, said fastener and said housing being manually movable relative to each other against said force when said longitudinal member is disengaged from said spacer and said positioning member applies said force; and a clamping mechanism that clamps said longitudinal member, said spacer and said housing to said fastener to prevent movement of said fastener relative to said housing. a longitudinal member connectable with a bone portion; a fastener having a longitudinal axis and engageable with the bone portion to connect said longitudinal member to the bone portion; a housing having a first passage configured to receive said longitudinal member, said housing having a second passage with a longitudinal axis extending transverse to said first passage said second passage having a first diameter, said fastener extending through an opening in said housing into said second passage and being movable relative to said housing, said longitudinal axis of said fastener being positionable in any one of a plurality of angular positions relative to said longitudinal axis of said second passage; a spacer received in said second passage of said housing and engageable with said fastener and said longitudinal member, said spacer having a first radial outer cylindrical surface having an outer diameter smaller than said first diameter of said second passage in the housing, and said spacer further including a second radial outer cylindrical surface having a diameter smaller than the first outer cylindrical surface and a radially extending surface extending between said first and second outer cylindrical surfaces (567, 568); a retaining portion having a radially inner cylindrical surface with a second diameter slightly greater than an outside diameter of the second radial outer cylindrical surface on the spacer, the retaining portion being press-fit into the second passage, the retaining portion being deformable relative to the second passage to adjust the distance between said retaining structure and the radially extending surface of the spacer; a positioning member disposed between the retaining structure and the spacer, the positioning member applies an axial force to the spacer to prevent relative movement between said fastener and said housing when said longitudinal member is disengaged from said spacer and said spacer engages said fastener, said fastener and said housing being manually movable relative to each other against said force when said longitudinal member is disengaged from said spacer and said positioning member applies said force; and a clamping mechanism that clamps said longitudinal member, said spacer and said housing to said fastener to prevent movement of said fastener relative to said housing.