Knurled knob
Black thermoplastic, glass fiber reinforced, mat.
Brass insert, smooth blind hole and tapped grub screw.
Brass insert with tapped through hole.
Threaded zinc plated steel stud.
Threaded stainless steel stud (AISI 303).
Black phenolic plastic.
Brass insert with tapped blind hole.
Seven-lobe knob
Aluminium. Polished surface.
Smooth blind hole.
Tapped blind hole.
Tapped through hole.
Four-lobe knob