Styrene Round Rod 1/16 .062 (8)

Probably not the average use case, but I use these as shear pins in my larger rockets. I insert the nose cone and mark its location, then drill 1/16 holes through the top of the body tube AND into the shoulder of the nose cone (the part that sits inside the top of the rocket body tube). Then, I cut very short lengths (depending on the thickness of the body tube itself) of 3/32 brass tubing (which happens to be 1/16 ID) and glue it into holes body tube holes with CA and/or epoxy. Once the epoxy or CA glue sets, I might have to bore/clean out the inside of the brass tube slightly again with the 1/16 bit. When I'm ready to fly, a short length (1 or less) of this 1/16 solid styrene rod goes through the hollow brass tubes and into the pre-drilled holes in the nose cone shoulder. When the apogee ejection charge fires, the shear pins hold the nose cone in place, until the main parachute deployment charges are fired, which are strong enough to pressurize the upper body and shear the styrene between the nose cone shoulder and these brass tube. Cuts like butter, and I've never had one not shear yet!