Kyosho 1-S53010 M3x10mm Set Screw 10pcs

A pack of ten M3 x 10mm set screws, from Kyosho's universal hardware range.

A set screw, also called a grub screw, is headless. The entire body threads into the part so nothing protrudes above the surface. That makes it the right fastener for locking a component onto a rotating shaft, and at 10mm it is also long enough to serve as a short stud or adjuster, threading through one part and into another.

They work by pressing their tip directly against whatever they clamp, and that means installation matters more than with a normal screw. Where used on a shaft, seat the tip on the machined flat rather than the round, because a grub screw tightened onto a round shaft will either work loose or dig in and damage it. Thread lock is standard practice, since vibration backs set screws out readily.

They are easy to lose, being small and headless, and a pinion or collar that has shed its grub screw usually takes something more expensive with it before you notice.

This supersedes the older Kyosho number 1161.