A small cap is missing to perfection

The holder holds my Note 10.1 absolutely fixed. However, to turn the holder 90 so I could push the tablet downward out, I do not dare. The tablet could slide down out and then are almost 500, - on the ground. Thus, the possibility is being able to turn the holder rather superfluous in my eyes. Had the stakes that hold the tablet, rubberized I'd feel safer.
The small wall mount is a dream. Meanwhile, I have three pieces of it assembled in one room. But what I missing here is the ability to cover the golden screw head. At the hardware store do you get something but to buy.