Originally Posted by ChrisH
Hello, our 73 trillium trailer had a number of rivets pop out and I would like to drill out a number of them and replace them. Does anyone no what size rivets are used on the trillium?
Carefully drill the head off and then measure the diameter of the hole.
Drill bits make a very handy diameter gauge to figure out the size of a small round hole.
As to the length, that can vary depending on what the accumulated thicknesses of materials it is fastening together. You can make a little tool to check that. Take a piece of stiff wire and bend a tiny L shape into one end of it. Then poke that into the hole and pull back until the L hits the inside surface of the stack of materials. Put some masking tape or a mark of some type around the wire on the outside right against the surface. The distance between the inside of the L and the mark from the outside is the "grip length" you need. The package of pop rivets will state what the grip range for the contents is.