Nut size (A.K.A. diameter) is the size bolt that the nut is used with. The same is true of the thread count. Thus a 1/4"-20 nut fits a 1/4"-20 bolt.
See also |
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Hex machine screw nuts, Zinc plated steelA hex nut in smaller sizes for machine screw diameters under 1/4". |
Metric hex nutsA standard six sided nut. |
Hex nylon insert lock nuts, Zinc plated steelA hex nut with a nylon ring to resist loosening. |