There are a variety of spring plungers. Talking of spring plungers these are also known as spring loaded devices as they have the spring inside threaded body or capsule as they call it. These are mainly used in tools and dies. It is also use in the case of assemblies and fixtures. Spring loaded devices include spring plungers, ball plungers, retractable plungers, and spring stops.
Like conventional spring plungers, these spring-loaded devices are made of low-carbon steel or stainless steel, and have an extra long spindle and steel tip. With some products, suppliers color-code the tips to indicate whether a spring plunger is designed for light force or heavy force.