Z185 washer  is used for Z167 beam extension connector, which is made up of two screws E111 and 2 washers Z185. The screw installs through the washer and locks into the beam extrusion hole.It is made of aluminum, and weighs 0.003 kilograms. All of our accessories are easy to install. Thanks to full ranges of accessories, Standard System is able to realize various functional and advanced designs and is easy to install, dismantle, transport and store. The most classic solution, yet still universal in countless scenarios, for standard booth\ shell scheme\display booth\exhibition booth\pavilion group booth\trade show\back to back booth\fascia board\expo and liner booth, widely used in exhibition industry. If you have the demand, Lingtong will provide the washer separately or attach the washer to the beam extrusion and send them to you together.