Ground Terminal Stud, brass that is plated in cadmium.
Dimensions: (please refer to the pictures and the list below to know all the relevant measurements; all measurements are in decimal inches)
 
-8 (#6-32 thread(0.138-32))
B=0.312
C=0.375
D=0.500
E=0.875
F=0.313
G=0.090