The Calmark Birtcher part 225-3.80H is a PCB retainer specifically designed for secure mounting and ultimate protection of printed circuit boards. This retainer features a unique tapped design and measures 3.8 inches, ensuring a perfect fit for various board sizes. It provides a reliable solution for preventing PCB movement, vibration, and damage in demanding environments. Manufactured to the highest quality standards, the Calmark Birtcher 225-3.80H is an excellent choice for any project requiring dependable PCB retention.