|Set screw body: Steel, black oxide finish
European standard 5.8 grade (comparable SAE class grade)
Tip: Brass or white nylon plastic
||Grub screws with brass or nylon tips GN 913.3
are recommended when the surface to be clamped must not be damaged.
They can be used with all different parts (levers, hand knobs, star knobs, and knurled nuts).