The 10-40450-20S is a shielding flat sealing gasket designed to enhance connector performance. It provides maximum electromagnetic interference (EMI) shielding, especially in challenging conditions of high receiver sensitivity and low signal strength, while maintaining effective sealing. This gasket is compatible with MIL-DTL-5015 and MIL-5015 series 20 shell size flange mounting receptacle circular connectors. It is suitable for use in defense, military, and aerospace applications.