Type E - with threaded blind bore.
Type C - with plain blind bore, Tol. H7.
GN5334.4 Star Knob, Stainless Steel, Female.
These star knobs have five lobes, which allow the user a firm, strong grip. resulting in high torques being easily achieved. The shape helps prevent slipping, even with wet hands. They are also ergonomically designed to prevent fatigue to the operator. Being stainless steel, they are ideal for clean environments and are strong, robust and long lasting.
Stainless Steel AISI 316L (A4), matt, shot blasted.
Knob - drawn from stainless steel sheet.
Hub - welded.