The usual method of retaining the stud in the removable panel is by use of a neoprene washer. Not only does this retain the stud, but it also compresses when the fastener is locked giving the spring element of the assembly. This prevents panel chatter, and provides a means of taking up any end play in the assembly.
A variety of lengths of washer are offered in each fastener series, The neoprene material is manufactured to BS2752, and has a working temperature range of -20°C to +100°C. Neoprene has excellent resistance to age hardening, ultra violet light and most industrial greases and oil.
The use of the neoprene washer gives the further practical advantage of ensuring that the stud is held out at 90° to the removable panel, making stud engagement into the clip easier when the panel is offered up to the framework. A particular advantage when several studs are used on the same panel.
As an alternative to the neoprene washer, the new Oddie range offers a stainless steel bowed washer which is used under the head of the stud to provide the spring element in the assembly. A DIN standard circlip is used to retain the stud in the removable panel. The use of this method of springing and retention is ideal where the removable panel has to sit flush with the framework, or where the environment precludes the use of a neoprene washer.