Type K - with threaded bush.
DIN6335 Star Knob, Duroplast Plastic, Stainless Steel Bush.
These star knobs are used for many applications, including clamping and machine adjustment. The four lobed shape provides a firm grip to easily achieve high torques whilst being comfortable to use. Strong robust plastic and a brass bush help prevent wear and breakages. A cost effective choice.
Plastic - KU Duroplast (PF), black, shiny finish.
Bushing - Stainless Steel, NI AISI 304