by cooasty, published
A light duty key designed to be used where a hose clamp is taken off or on frequently in low temperature conditions .
Printed the round portion at 40%. Faster speed will make hole smaller.
I used a 5/16" drill bit and/or rotary tool for internal cleanup.
Captive Handle;
Line up hex sides & push captive key on hose clamp nut. May need some effort to do this. Tap into place before first use. Some clamp ends stick up & tend to push the key off. Reforming the end into a tighter circle may solve this issue. Key end may be custom fitted after placing in 200 degree water.
Crazy Glue will make both keys very secure.
There are many variables with the nut shape, etc. So you will have to work with it to fit your needs.
6.22.16: uploaded v1.1 with slight taper on the bottom of print.
Is your location on your profile? I'd like to know where you are from & what you have designed.