Secure the galvanized steel trench drain grate with mesh design onto the BG-FILCOTEN® 300 trench drain channel body with these specialty bolts. Prevent grate displacement due to heavy runoff flows, pedestrian and vehicular traffic, and deter theft and vandalism. Four bolts and nuts are required to bolt to the four points located in the corners of the drain grate. Hex-head bolts can be secured with a hex socket screwdriver. Comes with one bolt and one nut.