J.W. Winco Inc. offers GN 6336.10 hand knobs with 316 stainless steel studs, with nylon plastic or brass tip, in metric sizes.
These RoHS-complaint components are designed to function when corrosion is to be avoided. The knob is matte black, glass-filled nylon plastic, and the threaded stud is European standard 1.4567 (American standard 316 series) stainless steel, molded-in. The stud features either a brass or plastic (Polyacetal POM) tip, which prevents indentations or other damage from occurring. Knob diameters from 25 to 50 mm are offered, with studs ranging from M5 to M10 threads and lengths from 10 to 55 mm.
This cleanroom product was featured on page 23 of the April 2013 issue of Controlled Environments.