Short thumb screw which mounts on the base of the Pro-Series and Pro-Series Mod-X neck as a strap button.

Due to production changes, the threading of the thumb screw changed several years ago. If your guitar was made in the past few years it is most likely the Thumb Screw with Thread "B". Please double-check your serial number to determine the correct threading using the list here.

Newer models use Thumb Screw "B":

• Pro-Series s/n above 219978
• All Pro-Series Mod-X models

Older models use Thumb Screw "A":

• Pro-Series s/n below 219978