This Hosco Deep Knurled Nut is used to extend the length of the threaded mounting section on imperial toggle switches like Switchcraft. These are great when rear mounting toggle switches through guitar bodies (as opposed to scratchplates which are thin) as the cavity depth can be kept shallower and the top wood thicker. The use of these extender nuts is particularly important when using the Switchcraft long body 3 way toggle switch which has a relatively short threaded section (Gibson installs a deep knurled nut as standard on all Gibson Les Paul guitars that use Switchcraft long body toggle switches).

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