Rheem UV12896 Screw-In Element, 240-volt/3000-watt, Copper Element - 240V/3500W Copper non-resistored hwd - 1 in screw-in Watt density classification: hwd, input Voltage (V): 240, wattage at 240V (w): 3500, watt density at 240V (w/sq. In. ): 173 Element length - flange to tip (in.): 12.60, ACTUAL thread size - outside diameter (in.): 1-9/32, nominal thread size - (in.): 1 Threads per inch: 11-1/2, thread Type series designation: NPSM, hex head size - across flats (in.): 1-1/2