Replace or upgrade your lock nut assembly. The Gotoh GHL-2 includes lock nut assembly with mounting hardware, string tree, 2.5mm and 3mm allen keys, and height adjustment shims.
Available in Chrome, Gold & Cosmo Black.
Features

1-11/16"(R4) 43mm
Base measures 1-11/16"(43mm) x 19/32"(15mm)
String spread is 1-7/16"(36.5mm)
Nut mounting holes are spaced 17/32"(14mm)
String tree mounting holes are spaced 1-1/8"(28.5mm)

Item shown: Gotoh GHL-2 Floyd Rose Guitar Locking Nut Top Mount
Model #: GHL2