10-16 x 1 1/2 Phillips Flat Undercut Full Thread Self Drilling Screw Zinc & Bake WIBZ They have a square head

They have a square head that fits into a square hole in the wood

The full contour thread ensures maximum engagement and holding power

130 Small Head Ribbed Rivet Nut Zinc Yellow Dichromate is a high-quality

and a full thread design that provides maximum holding power

10-16 x 1 1/2 Phillips Flat Undercut Full Thread Self Drilling Screw Zinc & Bake WIBZ They have a square head10 16 x 1 1 2 Phillips Flat Undercut Full Thread Self Drilling Screw Zinc & Bake is designed for fastening metal to wood or metal to metal. It features a Phillips drive head for easy installation, a flat undercut head for a flush finish, and a full thread for maximum holding power. The self drilling tip eliminates the need for pre drilling, making it ideal for quick and easy installation. The zinc and bake coating provides excellent corrosion