Set the units to millimeter and and make a sketch 

Press the bottom plane and using the rectangle tool make a box. Press the dimensions tool and type brick length 

Select the wedge and type brick width, finish sketch 

Using the extruding tool set the distance as height to raise the bricks stature  

 Create a sketch on top of the brick, press the circle tool and click for a center and outer.

Dimensions tool again and enter stud diameter, click the outer wall like and enter stud wall distance then finish. 

Extrude, and set it to stud height. 

Reuse/unhide the sketch for top stud, go to create-project press the circle and press ok. 

Go to Modify-offset and set its position to fit tolerance, finish the sketch, extrude the outer and inner circle

Go to create-pattern- rectangular pattern. change the object type to features then click the stud, press axes then select them, set distribution to spacing then axis 1 to length 2 to width and distance to stud spacing.