Salt water is a BITCH!!!:rant:1/8 6061-T6 for the cheek plates.
(4) 1/4" AN bolts into the rotor head,
(4) 1/4" AN bolts into the mast.
Just took mine apart tonight as a matter of fact.
Installing a brand new RFD rotor head for sh!ts and giggles.
Hoping it will be even smoother than my old Parson's bushing style head.
Got some bead blasting to do... Skimming the sand dunes has taken its toll.
Truth be known, 1/4" cheek plate bolts are overkill.