NUT; SUPERBOLT KIT PART SMX806 / W. 2.5 INCH NOMINAL THREAD DIA / STUD. 8 THREADS PER INCH. 5/8 INCH DIAMETER SET SCREWS. 5/16 INCH ALLEN BIT. 4.72 INCHES BODY DIAMETER. TOTAL THICKNESS WITH WASHER 1.13 INCHES. INCLUDES A TUBE OF JL-M LUBRICANT AND HARDENED WASHER