The Composite Strap Buckle (often referred to as a “fiber buckle” or “lashing buckle”) is the designated connector for high-strength polyester composite fiber straps. Typically made from stamped and hardened steel with a corrosion-resistant zinc or phosphated finish, it features a unique interlocking design. This buckle is applied using a special tensioner tool that pulls the strap tight and then crimps the buckle’s wings, creating a permanent, high-integrity mechanical lock. It is essential for securing heavy loads like steel coils, pipes, and timber, where the system strength far exceeds the strap’s linear strength.