Switchcraft 1/4 inch mono #11 input jack. Includes nut and washer. Requires 3/8"-diameter mounting hole; 3/8 x 32 threaded portion.Industry standard in quality and design. Essential component in all electric guitar builds.
The long thread version is recommended when mounting to a body - SG, 335, Firebirdm etc. The short bushing is great for mounting on a pickguard, control plate, or plastic or metal jack plate.