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Nut size (A.K.A. diameter) is the size bolt that the nut is used with. The same is true of the thread pitch. Thus a 6mm x 1.0 nut fits a 6mm x 1.0 bolt.
For additional dimensional information click on an individual product number or see our Metric Nut Size Table.

Product # Diameter and Thread pitch Buy Each Buy Box Box Qty Buy Bulk Bulk Qty Coarse (standard) thread 15041 1 4mm x 0.7mm    $1.02       $6.80    10    $62.60    100 15042 1 5mm x 0.8mm    $1.14       $7.64    10    $70.40    100 10274 6mm x 1.0mm    $1.17       $9.68    10    $89.10    100 10276 8mm x 1.25mm    $1.21       $9.87    10    $90.90    100 10278 10mm x 1.5mm    $1.34       $11.16    10    $103.00    100 15043 12mm x 1.75mm    $1.90       $12.64    10    $116.00    100

1 This item is not always in stock and may take up to 5 business days to ship.

See also

Hex lock nuts nylon insert

A hex nut with a nylon ring to resist loosening.