If you need to tuck a circuit board someplace and you can't fit a screw, use these handy low-profile, self-adhesive PCB standoffs
You can't leave a circuit board bouncing around in a case. You just ...can't! It's inviting disaster. Sparks. Fire! These are bad! Make sure your installation has your protoboard nestled down securely with a set of these adhesive standoffs. Snap them into the 0.25" mounting holes in your board, peel the stickers, and glom it into place.