Gotoh JCB-4 Gold Jack cover

Traditional jack plate found on Gibson® Les Paul® and many others. 

Jack plates are 1-11/32" (34.3mm) square, with mounting holes on 1" (25.4mm) centers. The hole for the jack is 3/8" (10mm) diameter.

Plated brass plates have a slight curve or bend to conform to the rounded sides of a Gibson® Les Paul®, and include matching mounting screws.