Spring loaded devices include spring plungers, ball plungers, retractable plungers, and spring stops. There are two basic types of spring plungers: conventional and integral. Both kinds of spring loaded devices are measured in metric units such as millimeters (mm) or English units such as inches (in). Conventional spring plungers have a separate set screw, plunger body or sleeve, and springs. Because the hex drive is not built into the plunger body, conventional spring plungers require the use of hand tools. Integral spring plungers combine the hex drive, plunger and body in a single piece. 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.

Ball plungers and retractable plungers are common categories of spring loaded devices. Ball plungers are usually made of stainless steel or low-carbon steel that has been treated with black oxide. To prevent loosening from impact or vibrations, products may incorporate a nylon locking mechanism. Common specifications for ball plungers include thread size, minimum and maximum force, and end type (slotted or hex). Typically, force is measured in pounds (lbs) or kilograms (kg). Retractable plungers are spring loaded devices that permit a plastic or metal plunger pin to be locked in a fully-retracted position. These spring loaded devices are often used in machining applications as positioners, loading pins or indexing devices. To facilitate alignment, the plunger pin may feature a slight taper at the end. Both pull-ring style retractable plungers and L-handle retractable plungers are commonly available.

Spring stops or spring stop buttons are spring loaded devices with a set screw which allows for adjustable plunger travel. In some products, an angled mounting slot provides a more secure hold. Materials of construction for spring stops and spring stop buttons include zinc aluminum for the body or sleeve, and low-carbon steel for the plunger. Although product names vary by suppliers, there are three basic designs: button, flat-button, and tang. End force, a parameter that is often measured in pounds (lbs), is another important product specification to consider when selecting spring loaded devices such as spring stops and spring stop buttons.