Alloy 410 corrosion-resisting steel components welded; passivated; surface without components heat treated to rockwell c40-c45; 22.95 in. Min, 23.0 in.Max outside radius through 69 degrees 30 min/70 degrees max arc; 5 bars 1-1/4 in. Diaw/3/8-16unc by 0.75 deep centered on 21.305 in. Radius