I do that on most of the nylon wing bolts I use it makes it allot easier to screw into the threads,I used to fight to get the Nextar wing bolt on all the time,my mount broke during a crash and since the replacement part wasn't available at the time after gluing the broken pieces to gether(just the threaded section) I epoxied a 1/4-20 nut onto the underside of the mount it was really tricky to get the screw to thred in properly, its held up for many years now even thought I rarely fly the plane any more,it still hangs from my ceiling in the shop.