The 1-1/4" FS SQ HD Plug by Capitol Manufacturing is a robust fitting designed for sealing pipe ends in fluid systems. This square head plug features a 1-1/4-inch size, providing a secure closure for pipes, preventing leaks and ensuring system integrity. Constructed from durable materials, it is suitable for various applications, including plumbing and industrial uses. The plug is designed for easy installation with a wrench, making it user-friendly for both professionals and DIYers. Its robust design ensures long-lasting performance, making it a reliable choice for sealing threaded connections in a variety of environments.