The hardest part for me was locating the M4 machine screws that will fit the standard 100x200 VESA mount of the TV. Every hardware store I checked around me only carried the SAE screw thread patterns.
I lucked out last week and finally found my screws in an IKEA KOSING (200.512.01) drawer pulls for $2. I took a chance on it having the right screws since I didn't carry a caliper with me and the package did not specify the screw size. It came with 24 screws 12 each in 3/4-inch and 1-inch sizes so my pulls still have a complete set of screws after this project.
Other materials needed was two 2x4x8 that I had left over from another project. Always good to have them around. A 6x10-inch piece of half-inch plywood (1 inch of material around the 100x200mm mount which translate to around 4x8 inches). A number of 8x3-inch drywall screws to attach everything together. Six washers - I don't know the exact size but it measures 11/16-inch outside diameter and 1/4-inch inside diameter.