I took the bolt with me to Ace Hardware and they gave me the correct knob. I just used a regular nut for several weeks. Sorry but I don't know the exact size.I lost a screw knob for the seat while riding. I apparently did not have it screwed down tight enough. Does anyone know the size information so that I can pick up a replacement?
Thanks, that makes sense.I just use wing nuts with a lock washer, they weigh less and stay on better