Hello Its probably there somewhere for the Heavy CNC, 

but can someone please  give a list of what bolts are button head or socket head  caps

Are the M4x 16mm Button  head or does it matter really ?

and do any of the other bolts apart from M6 x 30mm need lock nuts and washers?

Sorry if this is something that should be standing out to me but dont want to order without knowing first.

Regards

MadMacs

You can choose any screw head you want :)

 Pretty much anything that isn't a countersunk head I believe. 
Lock nuts and washers would be a good thing to grab as well. 

Thank you