Materials from Beryllium Copper are used in Contact RFI packaging.The contacter RFI type is Gasket.A RFI EMI from the well-known Electroground Washers series of products is being offered here.
8919-0135-40 Features
Gasket Electroground Washers series
8919-0135-40 Applications
There are a lot of Laird Technologies EMI 8919-0135-40 RFI and EMI Contacts applications.