What size screws do I need to assemble my SPX3000®? Your SPX3000 is equipped with 4 large screws and 2 small screws. 4- 4.8*25 for the handle 1- 4.8*20 for the hose hook 1-4.8*20 for the lower gun holder Related articles How do I assemble my SPX3000® Pressure Washer? Does my SPX3000 pressure washer have a downstream or upstream detergent injector? Chainsaw Why is there no detergent coming out? Can I use another brand's accessory with my Sun Joe pressure washer?