Screws 3/4" with nuts and 2 washers (plain and pressure washer) ASTM A-325 Type 1, ASME / Ansi B18.2.6 Thread diameter 1.1/4 Head height 15/32, Thread 1.3/8 Total length 1.1/2 a 6. 25.600 pcs (bolt, nut and washers)