A locator screw (72) is threaded into the locator screw hole in the first member.

The locator screw includes a conical nose (78) adapted to engage the conical face of the second member when the locator screw is turned in a first direction.

The bindiny mechanisms, which have a shape of cuboid, are set on the two ends of the regulae. plurality of regulae are connected by plurality of connection pins and plurality of positioning screws and form the combined frame.

Two bar shaped positioning slots are disposed on the body of time clock circuit board, which are used for fixing star card engaging with the positioning screw.

The combined frame is made up of regulae, bindiny mechanisms, which have a shape of cuboid, connection pins, and positioning screws.

The drill and tap guide system (100) includes an assembly support (101) which is engaged to the plate (20) by way of positioning screw (105) to the guide body (110).

The locator screw cooperates with the conical face of the second member to radially locate the second member with respect to the first member.

The clamping block seat (4) is provided with a positioning screw (2) for limiting the position of the saddle-shaped clamping block (1).

Simply fasten it to a table or other flat support using the positioning screw.

The support assemblies (26, 30, 32) include positioning screws (68) for adjusting the slider bearings (36) against the flange edges (38, 40).

These positioning screws (68) permit the slider bearings (36) to pivot so as to ensure they remain in full face contact with the corresponding flange edge (38, 40).

For this purpose, a positioning screw (1) having a threaded shaft part (2) and a receiving part (3) for a rod (5) at the head end is provided.