That would be my only concern... nylon bolts are what a lot of us use for shear pins, they definitely are not as strong as a metal screw would be, so the possibility of breaking one off is real. One scenario would be crosswind + tall rocket = lot of torque on rocket which creates shear force on top button. Nothing to do with size of motor installed.
Originally Posted by Peregrine Falcon
You can put that in the same drawer as open eye-bolts. Saves a little money, probably be okay most of the time, but the one time it fails is catastrophic. So, I would recommend not using a nylon bolt. The nylon washers and a roller of some sort would be fine with a real screw up the middle, though. Or, invest in a few actual rail buttons and have one less thing to worry about at T minus zero.
Wisconsin Organization of Spacemodeling Hobbyists
Fox Valley Rocketeers
Quad Cities Rocketry Society
2012 APCP: 41,326.8 Ns (1% P)
Highest altitude achieved: 21,981' AGL
"Gravity is a cruel and unpredictable mistress"