Finished Hex Nuts

Finished Hex Nuts

Finished hex nuts are the most common type of nut. Finished refers to the dimensional standard. Except for some smaller sizes, the width across the flats of the hex is one-and-a-half times the nominal diameter. Thickness of finished hex nuts is approximately 90% of the nominal diameter. In modern terminology, these parts are usually referred to as regular nuts or simply hex nuts. However, as we at Nickel Systems are old-timers in the fastener business, we still refer to these parts as finished hex nuts.

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Specifications & Technical Data

Dimensions


Nominal Size

Basic Major Diameter of Thread
F G H
Maximum Runout of Bearing Surface to Thread Axis, FIM (Specified Proof Load)
Width Across Flats Width Across Corners Thickness Hex Nuts
Min Max Min Max Min Max Up to 150,000 psi 150,000 psi and Greater
1/4 0.2500 0.428 0.438 0.488 0.505 0.212 0.226 0.015 0.010
5/16 0.3125 0.489 0.500 0.557 0.577 0.258 0.273 0.016 0.011
3/8 0.3750 0.551 0.563 0.628 0.650 0.320 0.337 0.017 00.012
7/16 0.4375 0.675 0.688 0.768 0.794 0.365 0.385 0.018 0.013
1/2 0.5000 0.736 0.750 0.840 0.866 0.427 0.448 0.019 0.014
9/16 0.5625 0.861 0.875 0.982 1.010 0.473 0.496 0.020 0.015
5/8 0.6250 0.922 0.938 1.051 1.083 0.535 0.559 0.021 0.016
3/4 0.7500 1.088 1.125 1.240 1.299 0.617 0.665 0.023 0.018
7/8 0.8750 1.269 1.312 1.447 1.516 0.724 0.776 0.025 0.020
1 1.0000 1.450 1.500 1.653 1.732 0.831 0.887 0.027 0.022
1-1/8 1.1250 1.631 1.688 1.859 1.949 0.939 0.999 0.030 0.025
1-1/4 1.2500 1.812 1.875 2.066 2.165 1.030 1.094 0.033 0.028
1-3/8 1.3750 1.994 2.062 2.273 2.382 1.138 1.206 0.036 0.031
1-1/2 1.5000 2.175 2.250 2.480 2.598 1.245 1.317 0.039 0.034
1-5/8 1.6250 2.35 2.43 2.679 2.805 1.364 1.416 0.044 0.038
1-3/4 1.7500 2.538 2.625 2.893 3.031 1.460 1.540 0.048 0.041
1-7/8 1.8750 2.722 2.813 3.103 3.247 1.567 1.651 0.051 0.044
2 2.0000 2.900 3.0000 3.306 3.464 1.675 1.763 0.055 0.047
2-1/4 2.2500 3.263 3.375 3.719 3.897 1.890 1.986 0.061 0.052
2-1/2 2.500 3.625 3.750 4.133 4.330 2.105 2.209 0.068 0.058
2-3/4 2.7500 3.988 4.125 4.546 4.763 2.319 2.431 0.074 0.064
3 3.000 4.350 4.500 4.959 5.196 2.534 2.654 0.081 0.070
3-1/4 3.2500 4.713 4.875 5.373 5.629 2.749 2.877 0.087 0.075
3-1/2 3.500 5.075 5.250 5.786 6.062 2.964 3.100 0.094 0.081
3-3/4 3.7500 5.438 5.625 6.199 6.495 3.178 3.322 0.100 0.087
4 4.0000 5.800 6.000 6.612 6.928 3.393 3.545 0.107 0.093

Finished Hex Nut Specifications

  • STANDARD (ASME/ANSI)
    • ASME B18.2.2 – 2010
  • METRIC (IFI)
Three Blue Hexagons Are Lined Up On A White Background
Three Blue Hexagons Are Lined Up On A White Background Three Blue Hexagons Are Lined Up On A White Background

Industries We Serve

Nickel Systems provides high quality exotic grade materials that hold up in the toughest, most severe heat and corrosive environments. With our large inventory of specialty fasteners in stock, we are always ready to answer the call to serve the most challenging applications.

Nickel Systems maintains an inventory of hex nuts in Hastelloy® (Alloys C276, C22, B2, B3), Carpenter® 20 (Alloy 20), Inconel® 600 (Alloy 600), AL6XN®, Duplex 2205, Nitronic® 60, 317L Stainless, Nickel 200, 330 Stainless, 904L, 18-8 Stainless and 316 Stainless in stock at all times.

A Bunch Of Nuts And Bolts On A White Surface

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