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</o:shapelayout></xml><![endif]--></head><body lang=EN-GB link="#0563C1" vlink="#954F72" style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal>First of all, thank you for the responses. All very helpful. Now I know exactly where I should be. Should be! <o:p></o:p></p><p class=MsoNormal>However, some ham-fisted cretin has been in there before me. I find that the slides are held down to the floor by bolts whose shank size is 3/8”. They’ve each had two of their flats ground down and they pass through 3/8” holes in the bottom half of the slides and thence through the floor to the outside. <o:p></o:p></p><p class=MsoNormal>I think that it’ll be too much trouble to replace them but, just in case, :-<o:p></o:p></p><p class=MsoNormal>What is the outside diameter of the so-called tube nut or t-nuts which should be coming up from below?<o:p></o:p></p><p class=MsoNormal>And what size are the bolts which come down from the slides/runners, through the floor and into the tube nuts? ¼” unf 28tpi at a wild guess? Or bigger?<o:p></o:p></p><p class=MsoNormal>See attached.<o:p></o:p></p><p class=MsoNormal>And, finally, is there another name for these “tube nuts” by which they might be found and bought at a sensible price? From their prices over here, they seem to be made of platinum.<o:p></o:p></p><p class=MsoNormal>Thanks,<o:p></o:p></p><p class=MsoNormal>Simon<o:p></o:p></p></div></body></html>