Two stainless steel precision turning parts with internal thread

Two stainless steel precision turning parts with internal thread, using various automatic lathe machining parts made of SUS303
The main process: turning, embossing, milling, rolling (or teeth), drilling, tapping, etc.
The small product specification on the left is M4*5*16 (thread * maximum outside diameter * total length, unit: MM, the same below), and is a straight-lined internal thread product.
The large product specification is M5*12*16, with one end milling on both sides