This is a lightweight leg I designed for my hexcopter. Using these legs gives about 6.5 cm of ground clearance under the hexcopter for payload.
The leg is mounted to the hexcopter using 4-40 screws and press-fit threaded inserts. The top of the leg has a hole to accept the insert. The inserts & screws I use are from McMaster-Carr; part numbers 92397A112 and 98511A213, respectively (not included).
The hole to accept the threaded insert is currently too large.