THREAD SIZE 3/4 X 16 MATERIAL ALUMINUM 32.16 355075-01 This 'T" nut is machined from aluminum to work with an idler plate with a 1.01" wide slot, it has 3/4-16 threads.

THREAD SIZE 3/4 X 16 MATERIAL TITANIUM 134.95 355075-03 This 'T" nut is machined from titanium to work with an idler plate with a 1.01" wide slot, it has 3/4-16 threads.

THREAD SIZE 5/8 X 18 MATERIAL STEEL 27.08 355062-02 This 'T" nut is machined from steel to work with an idler plate with a .77" wide slot, it has 5/8-18 threads for the idler pulley stud.