Material: 304 stainless steel (A2-70) and no exterior finish, greater strength and corrision resistance performance than regular stianless steel or zinc plated fasteners.
Nut Heigth: 5mm; Width from point to point of the head: 8.7mm; Feel free to contact us if you have no idea about what size to choose.
The nylon insert helps grip the screw thread to prevent from loosening. You could also find the matched screws with different head types in our shop with a very reasonable price.