The specific technical length of the Kwikset 83015-002 mounting screws is not explicitly detailed in standard hardware spec sheets, but standard Kwikset mechanical deadbolt mounting screws are typically 1-1/2 inches long. According to the official Kwikset Product Support Guide, these particular screws are engineered to perfectly fit and secure a 258 Series deadbolt on doors with a standard thickness ranging from 1-3/8 inches to 1-3/4 inches