Product Description

18-0001 Theodolite Target

For optical sighting: Bull’s Eye target on 45° Face

The 18-0001 provides a red bull’s eye target on a face which is ground to 45° with respect to the axis of the target’s shank. This allows easy sighting from a wide viewing angle. This plug target fits into holders which may be used with our Invar system (see below) or in any 1/4″ holder which provides a slip fit for a 0.2498″ shank. When used with an Invar tubing assembly, the target pattern is located on the central axis of the tubing stackup.

May Be Used With

15960-1-.25 or 15960-25MM-.25 Invar System target holders
740-A Adjustable Floor Target Mount


Effective length*:
0.500″ ± 0.0005″ (12.7mm ± 0.013mm)
Shank diameter:
0.2498″ +0.0000″, -0.0005″ for slip fit into 1/4″ target holder
Material: Stainless steel
Finish: Non-glare, ground finish for easy viewing

[*Effective length is measured from the bottom interface plane which mates to a target holder, to the point along the axis of the target which intersects the target face plane (the center of the bull’s eye).]