Use this nut from RS PRO to hold lead screws with trapezoidal threads firmly in place. It's a sturdy fastener that's often used on devices that move heavy loads, such as lathes or vises.
The bronze material makes the nut resistant to wear, so it's protected against damage from friction caused by constant movement. It's also corrosion and rust-resistant, so it's suitable for use in equipment that comes into contact with water or abrasive chemicals.
You'll commonly find this type of flanged nut in the food and beverage industries, as frequent cleaning and washdowns won't corrode the material. It's also suitable for use in machine tools, jacks and electric linear actuators.