Abstract: An apparatus for releasable fastening and for modifying the relative position of two components (1, 1?, Bf, G; 2, 2?, Bk, Br), which have a common connecting surface forming a contact surface (5, 5?), comprises two screws (3), which in coaction with specially configured V-shaped notch zones (9a1, 9a2; 9b1, 9b2; 9a3, 9a4; 9b3, 9b4) permit a relative positioning in zero-backlash and accurately aligned fashion, and serve as the fastening means. It is thereby possible to perform a linear displacement and/or a rotation and/or a tilt in simple fashion.

Abstract: A method and an apparatus for releasable fastening and for modifying the relative position of two components (1, 1?, Bf, G; 2, 2?, Bk, Br), which have a common connecting surface forming a contact surface (5, 5?), is described. Two screws (3), which in coaction with specially configured V-shaped notch zones (9a1, 9a2; 9b1, 9b2; 9a3, 9a4; 9b3, 9b4) permit a relative positioning in zero-backlash and accurately aligned fashion, serve as the fastening means. It is thereby possible to perform a linear displacement and/or a rotation and/or a tilt in simple fashion.