I have provided 2 files. One an IGS file that the other a pdf.
The part shown in the pdf (Section 4. Dimension) is required to be enclosed within the part you are modelling.
The part you are modelling is required to fit exactly into the igs file provided.
1. 3d model in .igs AND .stp format of the part in question.
2. 3d model in .igs AND .stp format of the part detailed in the .pdf (Section 4. Dimension).
All dimensions in mm