Original and period correct locking nut for 5150 and Beak Neck era Kramer guitars. The locking clamps are referred to as “Humpbacks” because of their unique shape on the top. Rear mounting screws included.
R2 size 1 5/8” / 1.625” 10” Radius
* Note that the mounting hole spacing is a little offset compared to Schaller nuts and your neck may need some modifications before installing.