What I do is put a business card between the 1st fret and the string, it should be tight. I find this is too small to me measured. The distance from the top of the 1st fret to the bottom of the string should be just a hair, for sure. Guitar Action at the 12th fret of a Fender Stratocaster. If the nut is too low, the string will bump into the first fret when it is played and it will "buzz," even if the rest of the instrument is properly set up and working well . Hey all I am a strict slide guitarist all strats and I am running into one issue. For me the most important part of set-up is the string height over at 12th fret which determines how the truss rod should be adjusted, the string height over at 1th fret isn't much hard to achieve right if you install the nut correctly it should be just enough a slightly room for between the string … To measure the height of the strings at the nut, measure from the top of the first fret to the bottom of the string. String height, or action, is highly customizable on the Fender Stratocaster. This string height is set to 5/64″. Experts differ in their opinions about which fret is best to measure string height from, with most saying that measuring from between the 8th and the 12th fret, is the best. A critical adjustment that is easily overlooked is the string height at the nut. Then read the nut slot depths. NOW it’s time to get rid of the capo.Measure the distance between the strings and the 1 st fret, and adjust as needed: file down the nut slots if the strings are too high, or shim the nut if the strings are already too low.After shimming, the strings will probably be too high, so you’ll still have to file down the slots to the exact height you’re after. A guitar’s action is defined principally in terms of the height at which the strings sit above a given fret. Setting up string height at the nut is somewhat mystical. This is where the string isn’t able to clear the first fret and rattles against it, creating a string buzz similar to a sitar. String Height (also known as Action) After you’ve adjusted your tremolo height and truss rod it’s time to adjust your Stratocaster string height. Adjust the low E String Height to 4/64″ but if it buzzes, adjust it higher. As a starting point, shoot for .02” in between the top of the first fret and the bottom of the string at the first fret on the wound strings (low E, A and D), and .018” for the plain strings (high G, B, and E). What would be the stock height above at the bottom end of the neck. The nut serves to define and maintain the spacing of the strings, and to hold them at the proper height. Nut slots that are too low will create what many players refer to as a “sitar” effect. You can start this process by making sure the guitar is up to pitch. looks like the top of the nut is almost an eighth of an inch above the fingerboard. The notches are now holding those strings about half that above the fretboard. That’s good because almost every player needs a custom string height to suit their own personal playing style. The ideal nut slot height, in terms of playability, is subjective — much like string action height … A correctly adjusted nut can help improve playability and intonation on the first couple of frets especially for barred or open chords. I asked about nut height because I was thinking it might be better for bending the 1 thru 3 string at the 2nd fret.