Slotted Nuts

Hex Slotted Nuts

 

A hex nut with opposed slots cut into the top of the nut through the centers of the flats. The slots are on the end opposite the bearing surface. The slots are for the insertion of a cotter pin to secure the nut when used with a drilled shank fastener.

Commonly used in the automotive industry to secure front wheel bearings / wheel hubs to spindles on cars and trucks.

Dimensions

Nominal Size or Basic Major Thread Diameter F G H T S Runout of Bearing Surface FIM
Width Across Flats Width Across Corners Thickness Unslotted Thickness Slot Width
Basic Max Min Max Min Basic Max Min Max Min Max Min Max
1/4 .250 7/16 .438 .428 .505 .488 7/32 .226 .212 .14 .12 .10 .07 .015
5/16 .3125 1/2 .500 .489 .577 .557 17/64 .273 .258 .18 .16 .12 .09 .016
3/8 .3750 9/16 .562 .551 .650 .628 21/64 .337 .320 .21 .19 .15 .12 .018
7/16 .4375 11/16 .688 .675 .794 .768 3/8 .385 .365 .23 .21 .15 .12 .018
1/2 .5000 3/4 .750 .736 .866 .840 7/16 .448 .427 .29 .27 .18 .15 .019
9/16 .5625 7/8 .875 .861 1.010 .982 31/64 .496 .473 .31 .29 .18 .15 .020
5/8 .6250 15/16 .938 .922 1.083 1.051 35/64 .559 .535 .34 .32 .24 .18 .021
3/4 .7500 1-1/8 1.125 1.088 1.299 1.240 41/64 .665 .617 .40 .38 .24 .18 .023
7/8 .8750 1-5/16 1.312 1.269 1.516 1.447 3/4 .776 .724 .52 .49 .24 .18 .025
1 1.0000 1-1/2 1.500 1.450 1.732 1.653 55/64 .887 .831 .59 .56 .30 .24 .027
1-1/8 1.1250 1-11/16 1.688 1.631 1.949 1.859 31/32 .999 .939 .64 .61 .33 .24 .030
1-1/4 1.2500 1-7/8 1.875 1.812 2.165 2.066 1-1/16 1.094 1.030 .70 .67 .40 .31 .033
1-1/2 1.5000 2-1/4 2.250 2.175 2.598 2.480 1-9/32 1.317 1.245 .86 .82 .46 .37 .039
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