Nylon Insert Lock Nuts are also known as stop nuts. The bolt threads into the nylon material are located at the top of the nut. The purpose of the nylon insert is to prevent backing off or loosening from vibration.
Universal Headboard & Footboard Hardware Kit - 304 One Size, Length - 3"
Metal Bed Frame with Headboard & Footboard Mattress Foundation Bed Base vidaXL
