Swivel feet consist of a plate and a threaded spindle or ball joint. Any plate can be combined with any threaded spindle or ball joint. The anti-slip plate absorbs vibrations and prevents the swivel foot slipping.
For matching threaded spindles see 27810.
For matching ball joints see 27811.
Form C with screw-on hole, without anti-slip plate
Form D with screw-on hole, with anti-slip plate