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Nuts

Slotted Nuts

Dimensions of Hex Thick Slotted Nuts

Nominal Size or
Basic Major
Dia of Thread		 F G H T S Runout of Bearing
Surface to Thread
Axis, FIM
Width Across Flats Width Across Corners Thickness Unslotted Thickness Width of Slot
Basic Max Min Max Min Basic Max Min Max Min Max Min Max
1/4 (0.2500) 7/16 0.438 0.428 0.505 0.488 9/32 0.288 0.274 0.20 0.18 0.10 0.07 0.015
5/16 (0.3125) 1/2 0.500 0.489 0.577 0.557 21/64 0.336 0.320 0.24 0.22 0.12 0.09 0.016
3/8 (0.3750) 9/16 0.562 0.551 0.650 0.628 13/32 0.415 0.398 0.29 0.27 0.15 0.12 0.017
7/16 (0.4375) 11/16 0.688 0.675 0.794 0.768 29/64 0.463 0.444 0.31 0.29 0.15 0.12 0.018
1/2 (0.5000) 3/4 0.750 0.736 0.866 0.840 9/16 0.573 0.552 0.42 0.40 0.18 0.15 0.019
9/16 (0.5625) 7/8 0.875 0.861 1.010 0.982 39/64 0.621 0.598 0.43 0.41 0.18 0.15 0.020
5/8 (0.6250) 15/16 0.938 0.922 1.083 1.051 23/32 0.731 0.706 0.51 0.49 0.24 0.18 0.021
3/4 (0.7500) 1-1/8 1.125 1.088 1.299 1.240 13/16 0.827 0.798 0.57 0.55 0.24 0.18 0.023
7/8 (0.8750) 1-5/16 1.312 1.269 1.516 1.447 29/32 0.922 0.890 0.67 0.64 0.24 0.1 8 0.025
1 (1.0000) 1-1/2 1.500 1.450 1.732 1.653 1 1.018 0.982 0.73 0.70 0.30 0.24 0.027
1-1 /8 (1.1250) 1-11/16 1.688 1.631 1.949 1.859 1-5/32 1.176 1.136 0.83 0.80 0.33 0.24 0.030
1-1/4 (1.2500) 1-7/8 1.875 1.812 2.165 2.066 1-114 1.272 1.228 0.89 0.86 0.40 0.31 0.033
1-3/8 (1.3750) 2-1/16 2.062 1.994 2.382 2.273 1-3/8 1.399 1.351 1.02 0.98 0.40 0.31 0.036
1-1/2 (1.5000) 2-1/4 2.250 2.175 2.598 2.480 1-1/2 1.526 1.474 1.08 1.04 0.46 0.37 0.039