Commonly known as stover nuts, top lock nuts feature chamfered corners and a conical top. The distortion in the top threads resists loosening from vibration. This unique design feature works by applying force against the bolt, protecting the nut from loosening. Also called one-way nuts, top lock nuts can only be installed one way and are often used in high temperature applications because they are all metal with no nylon insert.
Top lock nuts are designed to maintain integrity of fasteners in high vibration or shock load areas
Zinc finish offers moderate corrosion resistance
Install with hand tools such as a combination wrench
Applies force against the bolt to help lock the nut in place
Recommended for use with bolts and washers of a similar size and finish
Parts feature coarse 1/2-in-13 screw thread
2 pieces per retail package