These Button Knobs are available in two types, a threaded type with an internal metric thread and a knock-on type which are easily assembled onto a plain shaft/stud by use of a plastic hammer, eliminating threading operations. Once fitted, they are not prone to rotate or loosen with use or vibration.
This range of Button Knobs are contoured and have a generous dome to shank ratio which makes them ideal for both push and pull operations.
Material - High-Impact-Resistant Thermoplastic.