Accessories
![SW](https://www.rcn.it/wp-content/uploads/2019/10/SW.jpg)
Serrated washer (code: SW)
As prescribed by clause 6.4.1 of IEC/EN 60079-14, “connections shall be secure against self loosening”.
Serrated washers prevents self loosening behaviours caused by vibrations or impacts.
Serrated washers are normally fitted between the locknut and the wall of the enclosure as described on the installation guide on pages 146-147
Example Code
![SW-codice](https://www.rcn.it/wp-content/uploads/2019/10/SW-codice-150x150.png 150w, https://www.rcn.it/wp-content/uploads/2019/10/SW-codice-298x300.png 298w, https://www.rcn.it/wp-content/uploads/2019/10/SW-codice-300x300.png 300w, https://www.rcn.it/wp-content/uploads/2019/10/SW-codice.png 425w)
Technical drawing
![SW-disegno](https://www.rcn.it/wp-content/uploads/2019/10/SW-disegno-300x198.png 300w, https://www.rcn.it/wp-content/uploads/2019/10/SW-disegno-768x506.png 768w, https://www.rcn.it/wp-content/uploads/2019/10/SW-disegno-786x520.png 786w, https://www.rcn.it/wp-content/uploads/2019/10/SW-disegno-600x400.png 600w, https://www.rcn.it/wp-content/uploads/2019/10/SW-disegno.png 789w)
![SW-tabella](https://www.rcn.it/wp-content/uploads/2019/10/SW-tabella-175x300.png 175w, https://www.rcn.it/wp-content/uploads/2019/10/SW-tabella-768x1313.png 768w, https://www.rcn.it/wp-content/uploads/2019/10/SW-tabella-599x1024.png 599w, https://www.rcn.it/wp-content/uploads/2019/10/SW-tabella.png 792w)