OER PB55686R Features:

Upgrade and keep your 6-lug bolt pattern on your 1960-70 GM 2wd truck model when converting your rear drums to disc brakes. This rear 12" brake rotor features 6 x 5.5" bolt pattern, 7/16"-20 wheel studs, and 1.25" thick brake surface. Drilled and slotted. Fits RH side. Sold individually. Specifications: Rotor Dia 11.625"Rotor disc thickness 1.050"Overall height 2.375"Hat height 1.375"Hat thickness.250"Inner indexing diameter 5-lug - 3.090"Inner indexing diameter 6-lug - 3.542" Rotor Dia 11.625" Rotor disc thickness 1.050" Overall height 2.375" Hat height 1.375" Hat thickness.250" Inner indexing diameter 5-lug - 3.090" Inner indexing diameter 6-lug - 3.542"