pin lock

thingiverse

To make a three pin lock, you have to place the pins in the center shaft first. Next, insert the center shaft into the main body and drop the locking pins into their designated slots within the main body. You'll also need to add some small springs above each locking pin before pushing the end caps onto top of these springs. Once complete, slide the center end cap into position next to the center shaft and your lock is now fully assembled.