Dear Sir,
I have more than 10 years experience in the design of such details.
If you want to give this part to the manufacturer, you need a drawing so you have to measure all dimensions of the piece and provide them to me.
From the pictures I guess the part is approximately 8 x 8 x 40 mm. On one side, a hole 6 mm (I need depth) and on the other side - opening 1 mm. Are they connected each other?
If you want to add a screw to the model you must specify the diameter of the thread, pitch and the depth.
When all dimensions specified, I will provide (for no more than half an hour) a detailed drawing of the part in TIFF format and basic renders in JPEG format so you can open and print it. If you need more changes after meeting with the manufacturer I will make them free of charge.
Yours faithfully,
Rumen Bonchev