Versatile Thread Converter: The Pro-Shot. 17 Caliber 5/40 to 8/32 Thread Adaptor allows you to easily convert Pro-Shot. 17 and. 20 Cal rods to accept standard 8/32 threaded accessories. Ideal for cleaning. 22 Cal Rimfire rifles, this adaptor expands the compatibility of your cleaning rods, making them perfect for a wider range of firearms.