Trainwire said...
Those terminal blocks are railroad equipment. How many of them do you want. I have lots of them. Normally they come with Railroad lightning arrestors or other equipment. The hardware is 1/4-24. Normally 1/4 inch TPI is 20 or 28.
That's a really strange thread! The British 1/4" fine thread (BSF) is 26 tpi. General Motors used to make a unique thread of 1/4" (GM said 6.35 mm) with a 1mm pitch (25.4 tpi).
