This, states the company, creates a one-piece fastener that provides the user with "ease of use, effective bolt security and a reduction of assembly time and effort, all in one".
The one-piece design makes the nut perfect for use in hard-to-reach locations, adds Heico. “It also offers considerable reductions in assembly time and effort, and is easy, safe and fast to use even for non-specialist users, as well as being totally re-usable without any loss of function. The pre-assembled design has the nut and washer combined in a captive and rotary way, and eliminates the risk of misuse as the washer cannot be separated, meaning it cannot be applied incorrectly.”