1 1/8-7 x 3 1/2

which is fastened with Simpson Strong

475 Button Head Aluminun 5056 Rivet / Steel Mandrel - Package (500)The Button Head Aluminum 5056 Rivet with a Steel Mandrel is designed for high-strength fastening in a variety of applications

5/8-11 x 2 1/4 Grade 8 Hex Cap Screw Yellow Zinc Plated Domestic USA (25)

1 x 6 Dowel Pin Alloy Steel

3/8-16 x 2 1/2 Socket Head Cap Screws Thermal Black Oxide Alloy Steel Domestic USA - Bulk (500) Phillips Flat Particle Board Screws Plain and Lubed 1 1/8-7 x 3 1/23 8 16 x 2 1 2 Socket Head Cap Screws Thermal Black Oxide Alloy Steel Domestic USA Bulk (500) Socket Cap Screws with Thermal Black Oxide finish are made in the USA from durable alloy steel for superior strength and reliability. Featuring a hex drive and corrosion resistant coating, ideal for high performance and structural applications.