Hi, When fitting any metal to metal/ metal to plastic items on any 1/16 armour my first choice is to use M1.2 or M1.6 nuts bolts and washers if that wont work then I use Glue,
Pin Vise a pilot hole then using my Rolson tap and die set I work a thread for the bolt and drive it home,
Metal Parts for our Hobby are almost always made of soft material so it presents no problem for a pin vise and using nuts bolts and washers not only makes it look right but it allows the item to be removed later without damaging your Tank,
I buy all my Nuts Bolts and Washers from ----
www.prime-miniatures.co.uk
Brilliant service and he sells worldwide.
If you do decide to use small scale Nuts and Bolts I would recommend you buy a pair of Nut Spinners,
For M1.2 nuts you need 1.5mm and for M1.6 you need 2.5mm nut spinners.