19-02-2018, 12:12 PM
As the tank was significantly cleaner than the sender unit I left it alone. All is back together now using M4 bolts. I now have the 5/32 BSW bolts and there seems to be no difference in the threads. ie either bolt or nut between the two types are easily interchangeable. Now if I have a to remove the sender I know I can get the retaining bolts out without having to remove the tank.
1931 RN, 1933 APD