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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 4783 3mm x 0.5mm    $0.05       $1.69    100    $14.20    1000 4784 4mm x 0.7mm    $0.05       $1.86    100    $15.70    1000 4785 5mm x 0.8mm    $0.05       $1.91    100    $16.10    1000 4786 6mm x 1.0mm    $0.05       $2.06    100    $17.30    1000 4787 7mm x 1.0mm    $0.10       $5.66    100    $47.80    1000 4788 8mm x 1.25mm    $0.06       $3.56    100    $30.10    1000 4789 10mm x 1.5mm    $0.14       $7.83    100    $66.10    1000 4790 12mm x 1.75mm    $0.21       $6.70    50    $56.50    500 4791 14mm x 2.0mm    $0.31       $4.95    25    $41.80    250 7360 16mm x 2.0mm    $0.32       $5.13    25    $43.30    250 Fine thread 6874 8mm x 1.0mm    $0.13       $7.57    100    $62.80    1000 6875 10mm x 1.25mm    $0.23       $14.36    100    $119.00    1000 6877 12mm x 1.5mm    $0.33       $10.87    50    $89.90    500 6879 14mm x 1.5mm    $0.58       $18.35    50    $152.00    500 6880 16mm x 1.5mm    $0.74       $23.11    50    $191.00    500 6881 18mm x 1.5mm    $1.62       $30.70    25    $254.00    250 6882 20mm x 1.5mm    $2.14       $39.97    25    $331.00    250 Super Fine 6876 10mm x 1.0mm    $0.24       $14.86    100    $123.00    1000 6878 12mm x 1.25mm    $0.34       $11.11    50    $91.90    500

See also

Hex nuts

A standard six sided nut.