AndyMark develops, manufactures, and distributes mechanical and electrical parts for the mobile and competitive robotics market, with a focus on robotics education. The AndyMark staff strives to support the FIRST Community and the robotics education market by developing and distributing important components to robot builders and for mobile robotics.
This is a Trilobe, thread forming, or thread rolling screw, ideal for applications where the screw is being threaded into plastic or metal.
A flat washer is part of the 5/16 hex head, providing more surface area contact than a regular hex head. The increased bearing area decreases the likeliness of crushing mating surfaces. Trilobe, or Thread Rolling, screws have a blunt tapered point that requires a pre-drilled or punched hole; eliminates chips and permits replacement with standard screw. Zinc plating froms a zinc carbonate film that greatly retards the corrosion rate in a normal atmosphere, which is similar to the aluminum oxide film that forms on aluminum that accounts for its low corrosion rate.