Multi-tool Mounting Screw Set
American lathe turned tripod plate screws
The easiest upgrade you could make for your tripod system.
Don't bet your stability and safety on cheap pot metal screws.
Sold as a set of 1 x 1/4-20 Screw & 1 x 3/8-16 Screw as an perfect upgrade for your DP-60R to HOG or PIG Saddle attachment.