Attach M42 and M48 accessories together, The threads on the two sides are: M42 Male thread and M48 x 0.75mm Male Thread
All metal construction, anodic oxidation treatment
Fine Outward Appearance
This adapter makes it possible to attach M42 and M48 accessories together. It is low profile and it adds 4mm of depth once it has been attached. : M42 Male thread and M48 x 0.75mm Male Thread.