439 Track Adaptor for Glue On PadScotty's track adaptor allows you to mount your favourite track accessories to your inflatable watercraft pre installed 341 mounts.Simply fasten the track to your 341 mount with the supplied A 1/4 - 20 x A 1/2" stainless steal bolts. Slide and lock our 438 gear head adaptor or ball mount onto the track. Attach your post and ball mount accessories to the adapter and get out on the water.