The Harcraft tub diverter stem appears to be captive due to a small metal pin that allows the stem to only rotate 90 degrees. The pin protudes into a slot on the bottom of the valve body,much the same way the clip on a Moen faucet protudes into the slot. There is a packing nut but it serves no packing function, it appears to be there just to stop the stem coming out but even with the nut out, stem stays put. Has anyone out there ever pulled this stem?