We have screws & escutcheons for certain revolvers and guns that can accommodate the screw going through the grip panel and gun frame and seating into an escutcheon (or nut) on the opposite panel,
at a cost of $6.50 for the set.

We also carry:
Blued Screws - Grip-Caps (Misc) ($3.00)
Authentic Embossed Blued Screws Winchester Caps ($5.50)
Two Buttplate Screws Domed Head ($5.90)