The Duraflex Roller Clamp Lock Nut is 5/16 inches and aluminum. (It is included with item DF-533.) Two nuts are required per Roller Block but the item is sold individually.
The Duraflex Roller Clamp Lock Nut works in conjunction with the Roller Clamp Stud to hold the Duraflex Roller Clamp (DF-521) in place. Sold individually.
NOTE: Duraflex boards, stands and parts are NOT for residential use. Duraflex will not sell any boards, stands or parts to residential customers as residential pools are not designed to meet FINA (International Swimming Federation) guidelines.
