Rubber Blanking Plugs, also known as grommets, are usually used in the sheet metal to safeguard against sharp edges. They are of great use in close panel cavities. They play a critical role in making sure that anything that passes through a metal bulkhead is undamaged and doesn’t rattle during operation overtime. In addition, they facilitate quick solutions and have a clean surface effect. They are also used to snap into holes when wiring. These plugs are a cost-effective way to close access, with the plastic fins of the plug holding them firmly in place. They can be easily fitted into panels without much effort, they clip firmly into position and also provide an attractive finish. Rubber blanking plugs are available in various sizes, ranging from 4.7 x 9.3mm to 51.5 x 57.5mm. They are usually made of TPR Rubber. They come in the shape of Domed Blanking Plugs, these provide and easily fit with irregular shapes while providing excellent sealing properties. They can withstand temperatures from -40°C to 135°C, and are acid-resistant. When choosing Rubber blanking plugs, you need to consider the size of the hole that needs to be drilled into a panel and the size of the hole in the center of the plug. The blanking plugs can also be made of silicone which can be used if you need high-temperature resistance. One can measure the size using a pair of calipers. However, that can be a cumbersome process, especially for thin rubber. Instead, one can use a standard plastic sheet with cut-out circles. These circles are of measured diameters and can help one estimate the required size of plugs by fitting them into the sheet. Then you can measure the size of the circle diameter in the sheet to get the size of the grommet.