Fender 62 Vintage Stratocaster Owners Manual - Page 5

If a string plays flat at the 12th fret when compared with the harmonic at the fret, turn the longitudinal screw counterclockwise so as to move the bridge bar toward the neck. If the note at the 12th fret is sharp when compared with the harmonic then the string length is too short and the bridge bar should be adjusted clockwise. These adjustments will be fractional and should not be necessary except in unusual circumstances. Check the harmonic and the 12th fret note several times while making the string length adjustments to be sure the bridge is not moved past the proper position. ADJUSTABLE NECK TRUSS ROD (See photo "B") A well-known feature of all Fender Electric Guitars is the adjustable neck truss rod which maintains perfect neck alignment. If for any reason the neck of your Stratocaster appears to require further adjustment, you can make the correction without the necessity of returning the instrument to your dealer or the manufacturer. Lay the instrument on a table or other flat surface and insert a small standard-head screwdriver in the nut exposed at the end of PHOTO "B"