221128-1 is a 50 Ohm BNC crimp plug connector designed for RF coaxial cable termination. This connector features a crimp termination style and is part of the AMP RF coax connector family. The connector has a maximum diameter of 14.53 mm (0.572 in) and is suitable for commercial applications. It is commonly used in RF signal transmission, test equipment, and communication systems where reliable coaxial connections are required.