10 Ago 8″ Fully Machined Threaded Back Plate 2-1/4-8 For 3 or 4 Jaw Self Center Chuck #
Shars 8" Fully Machined Threaded Back Plate 2-1/4-8 For 3 or 4 Jaw Chuck NEW For back plate you would not need to drill any mounting holes but you will need to turn the shoulder D1 down .040" to match the back of the lathe...