Hex Slotted Nuts: Technical Information

Hex Slotted Nuts Drawing

Hex Slotted Nuts: Dimensions (ANSI/ASME B18.2.2) 

Nominal or Basic Major Diameter of Thread

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 Width Across Flats (F)

 Width Across Corners (G)     Thickness (H)
 Unslotted Thickness (T) Width of Slot (S) Runout of Bearing Surface FIM
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 7/32 0.226 0.212 0.14 0.12 0.10 0.07 0.015
5/16 0.3125 1/2 0.500 0.489 0.577 0.557 17/64 0.273 0.258 0.18 0.16 0.12 0.09 0.016
3/8 0.3750 9/16 0.562 0.551 0.650 0.628 21/64 0.337 0.320 0.21 0.19 0.15 0.12 0.018
7/16 0.4375 11/16 0.688 0.675 0.794 0.768 3/8 0.385 0.365 0.23 0.21 0.15 0.12 0.018
1/2 0.5000 3/4 0.750 0.736 0.866 0.840 7/16 0.448 0.427 0.29 0.27 0.18 0.15 0.019
9/16 0.5625 7/8 0.875 0.861 1.010 0.982 31/64 0.496 0.473 0.31 0.29 0.18 0.15 0.020
5/8 0.6250 15/16 0.938 0.922 1.083 1.051 35/64 0.559 0.535 0.34 0.32 0.24 0.18 0.021
3/4 0.7500 1-1/8 1.125 1.088 1.299 1.240 41/64 0.665 0.617 0.40 0.38 0.24 0.18 0.023
7/8 0.8750 1-5/16 1.312 1.269 1.516 1.447 3/4 0.776 0.724 0.52 0.49 0.24 0.18 0.025
1 1.0000 1-1/2 1.500 1.450 1.732 1.653 55/64 0.887 0.831 0.59 0.56 0.30 0.24 0.027
1-1/8 1.1250 1-11/16 1.688 1.631 1.949 1.859 31/32 0.999 0.939 0.64 0.61 0.33 0.24 0.030
1-1/4 1.2500 1-7/8 1.875 1.812 2.165 2.066 1-1/16 1.094 1.030 0.70 0.67 0.40 0.31 0.033
1-3/8 1.3750 2-1/16 2.062 1.994 2.382 2.273 1-11/64 1.206 1.138 0.82 0.78 0.40 0.31 0.036
1-1/2 1.5000 2-1/4 2.250 2.175 2.598 2.480 1-9/32 1.317 1.245 0.86 0.82 0.46 0.37 0.039
2 2.000 3 3.000 2.900 3.464 3.306 1-23/32 1.759 1.679 1.24 1.20 0.52 0.43 0.048

 

Hex Slotted Nuts: Performance & Mechanical Specs (ANSVASME B18.2.2)
Description Hex nut with opposite slots cut through the flats center into the top of the nut. The slots are at the  opposite end.
Applications When slots are used with a drilled shank fastener, the slots are for the insertion of a cotter pin to secure the nut.
Material

Nuts made from a low-carbon steel conforms to the below chemical composition requirements.
Carbon:0.47% max.; Phosphorus: 0.12% max.; Sulfur: 0.23% max.
Core Hardness

Rockwell C32 maximum
Proof Load 

72,000 psi.
Plating

See table above for nut dimensions.