STUD FOR THERMOSTAT HOUSING WITHOUT SANDWICH PLATE (5/16") & SOME 12G103

Probably the most changed stud on the Mini. This is the length used on every A series engine until the introduction of the sandwich plate when longer ones were required. 

This stud originally replaced CHS2514, but is 2-3 threads 5mm longer on the end the nut fits which means it might have to be shortened for use on manifolds for fitting carbs, so CHS2514 is advised.

Also used on inlet manifold for HIF carb.