Hmm, thought i could get smart and do it in Fusion360 which comes up with this code...
(1)
(T1 D=6. CR=0. - ZMIN=-10. - RIGHT HAND TAP)
G90 G94 G91.1 G40 G49 G17
G21
G28 G91 Z0.
G90


(DRILL2)
M5
M9
T1 M6
S1000 M3
G54
M7
G0 X-5. Y0.
G43 Z15. H1
Z5.
M29 S1000
G98 G84 X-5. Y0. Z-10. R4. F1000.
G80
Z15.


M9
G28 G91 Z0.
M30

This should be a M6 thread 10mm deep with a 4 second pause, But it seems Mach3 does not recognise G84 so thats out, whatever G84 really is :)