Standard use trim rings, small thin jack plates and pickguard mounting brackets for musical instruments.
2.6mm diameter (#3) by 18mm length (just under 11/16")
WO Oval head phillips screw setup. (use #1 Philips tip)
Root is .088"
Flat Head with #1 phillips.
Requires good quality #1 phillips screw driver tip
It is recommended you wax this screw when mounting in a new location.