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ASME B18.2.2 Hex Nut
  • ASME B18.2.2 Hex NutASME B18.2.2 Hex Nut
  • ASME B18.2.2 Hex NutASME B18.2.2 Hex Nut

ASME B18.2.2 Hex Nut

Leader-Fastener® is a manufacturer and distributor of ASME B18.2.2 Hex Nut. We have a complete line of service from having invested in production plants, export department and to having a quality control team and center to meet your requirements. We regard quality as the life of the company. We persist in good quality as the first policy and have established a set of quality control and inspection system according to the international standard. We have carried out ISO9001 Quality Guarantee System in every course of production, transportation and selling. We do hope we could be your partner in business by topping quality, knight service and competitive price in the near future and be your friends as well.

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Product Description

We offer ASME B18.2.2 Hex Nut American specification fasteners including Hex Jam Nuts, Metric Flange Nuts, Metric Heavy Hex Nuts, Metric Slotted Hex Nuts, Acorn Nuts and Spring Nuts. For custom ASME B18.2.4.1M Metric Hex Nuts, we strictly follow the client’s specification and critical parameter. We satisfied our customer with our services and high-quality product.


Product Specification of Leader-Fastener® ASME B18.2.2 Hex Nut

Material : Carbon steel, Stainless steel, Alloy Steel, Brass.

Finishment: Black, Zinc Plated, Zinc Yellow, HDG, Phosphate, DACROMET, Geomet, Magin, Ruspert, Teflon, etc.


Leader-Fastener® ASME B 18.2.2 - 2022 Hex Machine Screw Nuts [Table 1] (ASTM A563 / F594 / F467)


Screw Thread 0# 1# 2# 3# 4# 5# 6# 8# 10# 12# 1/4 5/16 3/8
d 0.0600 0.0730 0.0860 0.0990 0.1120 0.1250 0.1380 0.1640 0.1900 0.2160 0.2500 0.3120 0.3750
PP UNC 80 64 56 48 40 40 32 32 24 24 20 18 16
s max 0.156 0.156 0.188 0.188 0.25 0.312 0.312 0.344 0.375 0.438 0.438 0.562 0.625
min 0.15 0.15 0.18 0.18 0.241 0.302 0.302 0.332 0.362 0.423 0.423 0.545 0.607
k max 0.05 0.05 0.066 0.066 0.098 0.114 0.114 0.13 0.13 0.161 0.193 0.225 0.257
min 0.043 0.043 0.057 0.057 0.087 0.102 0.102 0.117 0.117 0.148 0.178 0.208 0.239


ASME B 18.2.2 - 2022 Hex Flat Nuts and Hex Flat Jam Nuts [Table4] (ASTM A563 / F594 / F467)


Screw Thread 1-1/8 1-1/4 1-3/8 1-1/2
d 1.1250 1.2500 1.3750 1.5000
PP UNC 7 7 6 6
UNF 12 12 12 12
8-UN 8 8 8 8
s Nominal Size 1-11/16 1-7/8 2-1/16 2-1/4
min 1.631 1.812 1.994 2.175
max 1.688 1.875 2.062 2.250
e min 1.859 2.066 2.273 2.480
max 1.949 2.165 2.382 2.598
m Nominal Size 1 1-3/32 1-13/64 1-5/16
min 0.970 1.062 1.169 1.276
max 1.030 1.126 1.237 1.348
m1 Nominal Size 5/8 3/4 13/16 7/8
min 0.595 0.718 0.778 0.839
max 0.655 0.782 0.846 0.911


①,Threads shall meet the requirements of ASME B.1

②,If electroplated finishes are required,reference ASTM F1941.Other finishes may be specified as indicated in the applicable mechanical and performance standards.


ASME B 18.2.2 - 2022 Hex Nuts and Hex Jam Nuts [Table 5] (ASTM A563 / F594 / F467)


Screw Thread 1/4 5/16 3/8 7/16 1/2 9/16 5/8 3/4 7/8 1 1-1/8 1-1/4 1-3/8
d 0.2500 0.3125 0.3750 0.4375 0.5000 0.5625 0.6250 0.7500 0.8750 1.0000 1.1250 1.2500 1.3750
PP UNC 20 18 16 14 13 12 11 10 9 8 7 7 6
UNF 28 24 24 20 20 18 18 16 14 12 12 12 12
8-UN - - - - - - - - - - 8 8 8
s min 0.428 0.489 0.551 0.675 0.736 0.861 0.922 1.088 1.269 1.450 1.631 1.812 1.994
max 0.438 0.500 0.563 0.688 0.750 0.875 0.938 1.125 1.312 1.500 1.688 1.875 2.062
e min 0.488 0.557 0.628 0.768 0.840 0.982 1.051 1.240 1.447 1.653 1.859 2.066 2.273
max 0.505 0.577 0.650 0.794 0.866 1.010 1.083 1.299 1.516 1.732 1.949 2.165 2.382
m min 0.212 0.258 0.320 0.365 0.427 0.473 0.535 0.617 0.724 0.831 0.939 1.030 1.138
max 0.226 0.273 0.337 0.385 0.448 0.496 0.559 0.665 0.776 0.887 0.999 1.094 1.206
m1 min 0.150 0.180 0.210 0.240 0.302 0.301 0.363 0.398 0.458 0.519 0.579 0.687 0.747
max 0.163 0.195 0.227 0.260 0.323 0.324 0.387 0.446 0.510 0.575 0.639 0.751 0.815
Screw Thread 1-1/2 1-5/8 1-3/4 1-7/8 2 2-1/4 2-1/2 2-3/4 3 3-1/4 3-1/2 3-3/4 4

d 1.5000 1.6250 1.7500 1.8750 2.0000 2.2500 2.5000 2.7500 3.0000 3.2500 3.500 3.7500 4.0000
PP UNC 6 - 5 - 4-1/2 4-1/2 4 4 4 4 4 4 4
UNF 12 - - - - - - - - - - - -
8-UN 8 8 8 8 8 8 8 8 8 8 8 8 8
s min 2.175 2.350 2.538 2.722 2.900 3.263 3.625 3.988 4.350 4.713 5.075 5.438 5.800
max 2.250 2.430 2.625 2.813 3.000 3.375 3.750 4.125 4.500 4.875 5.250 5.625 6.000
e min 2.480 2.679 2.893 3.103 3.306 3.719 4.133 4.546 4.959 5.373 5.786 6.199 6.612
max 2.598 2.805 3.031 3.247 3.464 3.897 4.330 4.763 5.196 5.629 6.062 6.495 6.928
m min 1.245 1.364 1.460 1.567 1.675 1.890 2.105 2.319 2.534 2.749 2.964 3.178 3.393
max 1.317 1.416 1.540 1.651 1.763 1.986 2.209 2.431 2.654 2.877 3.011 3.322 3.545
m1 min 0.808 0.868 0.929 0.989 1.050 1.155 1.401 1.522 1.643 1.748 1.870 1.990 2.112
max 0.880 0.944 1.009 1.073 1.138 1.267 1.427 1.556 1.685 1.814 1.943 2.072 2.201


①,Threads shall meet the requirements of ASME B.1

②,If electroplated finishes are required,reference ASTM F1941.Other finishes may be specified as indicated in the applicable mechanical and performance standards.


ASME B 18.2.2 - 2022 Hex Thick Nuts [Table7] (ASTM A563 / F594 / F467)



Screw Thread 1/4 5/16 3/8 7/16 1/2 9/16 5/8 3/4 7/8 1 1-1/8 1-1/4 1-3/8 1-1/2
d 0.250 0.3125 0.375 0.4375 0.500 0.5625 0.625 0.750 0.875 1.000 1.125 1.250 1.375 1.500
PP UNC 20 18 16 14 13 12 11 10 9 8 7 7 6 6
UNF 28 24 24 20 20 18 18 16 14 12 12 12 12 12
8-UN - - - - - - - - - - 8 8 8 8
s Nominal Size 7/16 1/2 9/16 11/16 3/4 7/8 15/16 1-1/8 1-5/16 1-1/2 1-11/16 1-7/8 2-1/16 2-1/4
min 0.428 0.489 0.551 0.675 0.736 0.861 0.922 1.088 1.269 1.450 1.631 1.812 1.994 2.175
max 0.438 0.500 0.562 0.688 0.750 0.875 0.938 1.125 1.312 1.500 1.688 1.875 2.062 2.250
e min 0.488 0.557 0.628 0.768 0.840 0.892 1.051 1.240 1.447 1.653 1.859 2.066 2.273 2.480
max 0.505 0.577 0.650 0.794 0.866 1.010 1.083 1.299 1.516 1.732 1.949 2.165 2.382 2.598
m Nominal Size 9/32 21/64 13/32 29/64 9/16 39/64 23/32 13/16 29/32 1 1-5/32 1-1/4 1-3/8 1-1/2
min 0.274 0.320 0.398 0.444 0.552 0.598 0.706 0.798 0.890 0.982 1.136 1.228 1.351 1.474
max 0.288 0.336 0.415 0.463 0.573 0.621 0.731 0.827 0.922 1.018 1.176 1.272 1.399 1.526


ASME B 18.2.2 - 2022 Heavy Hex Flat Nuts and Heavy Hex Flat Jam Nuts [Table 10] (ASTM A563 / F594 / F467)


Screw Thread 1-1/8 1-1/4 1-3/8 1-1/2 1-3/4 2 2-1/4 2-1/2 2-3/4 3 3-1/4 3-1/2 3-3/4 4
d 1.1250 1.2500 1.3750 1.50000 1.7500 2.0000 2.2500 2.5000 2.7500 3.0000 3.2500 3.5000 3.7500 4.0000
PP UNC 7 7 6 6 5 4-1/2 4-1/2 4 4 4 4 4 4 4
UNF 12 12 12 12 - - - - - - - - - -
8-UN 8 8 8 8 8 8 8 8 8 8 8 8 8 8
s Nominal Size 1-13/16 2 2-3/16 2-3/8 2-3/4 3-1/8 3-1/2 3-7/8 4-1/4 4-5/8 5 5-3/8 5-3/4 6-1/8
min 1.756 1.938 2.119 2.300 2.662 3.025 3.388 3.750 4.112 4.475 4.838 5.200 5.562 5.925
max 1.812 2.000 2.188 2.375 2.750 3.125 3.500 3.875 4.250 4.625 5 5.375 5.750 6.125
e min 2.002 2.209 2.416 2.622 3.035 3.449 3.862 4.275 4.688 5.102 5.515 5.928 6.341 6.755
max 2.093 2.309 2.526 2.742 3.175 3.608 4.041 4.474 4.907 5.340 5.774 6.207 6.640 7.073
m Nominal Size 1-1/8 1-1/4 1-3/8 1-1/2 1-3/4 2 2-1/4 2-1/2 2-3/4 3 3-1/4 3-1/2 3-3/4 4
min 1.079 1.187 1.310 1.433 1.679 1.925 2.155 2.401 2.647 2.893 3.124 3.370 3.616 3.862
max 1.155 1.282 1.409 1.536 1.790 2.044 2.298 2.552 2.806 3.060 3.314 3.568 3.822 4.076
m1 Nominal Size 5/8 3/4 13/16 7/8 1 1-1/8 1-1/4 1-1/2 1-5/8 1-3/4 1-7/8 2 2-1/8 2-1/4
min 0.579 0.687 0.747 0.808 0.929 1.050 1.155 1.401 1.522 1.643 1.748 1.870 1.990 2.112
max 0.655 0.782 0.846 0.911 1.040 1.169 1.298 1.552 1.681 1.810 1.939 2.068 2.197 2.326


ASME B 18.2.2 - 2022 Heavy Hex Nuts and Heavy Hex Jam Nuts [Table 11]


Screw Thread 1/4 5/16 3/8 7/16 1/2 9/16 5/8 3/4 7/8 1 1-1/8 1-1/4 1-3/8
d 0.2500 0.3125 0.3750 0.4375 0.5000 0.5625 0.6250 0.7500 0.8750 1.0000 1.1250 1.2500 1.3750
PP UNC 20 18 16 14 13 12 11 10 9 8 7 7 6
UNF 28 24 24 20 20 18 18 16 14 12 12 12 12
8-UN - - - - - - - - - - 8 8 8
s Nominal Size 1/2 9/16 11/16 3/4 7/8 15/16 1-1/16 1-1/4 1-7/16 1-5/8 1-13/16 2 2-3/16
min 0.488 0.546 0.669 0.728 0.850 0.909 1.031 1.212 1.394 1.575 1.756 1.938 2.119
max 0.500 0.562 0.688 0.750 0.875 0.938 1.062 1.250 1.438 1.625 1.812 2.000 2.188
e min 0.556 0.622 0.763 0.830 0.969 1.037 1.175 1.382 1.589 1.796 2.002 2.209 2.416
max 0.577 0.650 0.794 0.866 1.010 1.083 1.227 1.443 1.660 1.876 2.093 2.309 2.526
m Nominal Size 15/64 19/64 23/64 27/64 31/64 35/64 39/64 47/64 55/64 63/64 1-7/64 1-7/32 1-11/32
min 0.218 0.280 0.341 0.403 0.464 0.526 0.587 0.710 0.833 0.956 1.079 1.187 1.310
max 0.250 0.314 0.377 0.441 0.504 0.568 0.631 0.758 0.885 1.012 1.139 1.251 1.378
m1 Nominal Size 11/64 13/64 15/64 17/64 19/64 21/64 23/64 27/64 31/64 35/64 39/64 23/32 25/32
min 0.156 0.186 0.216 0.247 0.277 0.307 0.337 0.398 0.458 0.519 0.579 0.687 0.747
max 0.188 0.220 0.252 0.285 0.317 0.349 0.381 0.446 0.510 0.575 0.639 0.751 0.815
Screw Thread 1-1/2 1-5/8 1-3/4 1-7/8 2 2-1/4 2-1/2 2-3/4 3 3-1/4 3-1/2 3-3/4 4

d 1.5000 1.6250 1.7500 1.8750 2 2.2500 2.5000 2.7500 3.0000 3.2500 3.5000 3.7500 4.0000
PP UNC 6 - 5 - 4-1/2 4-1/2 4 4 4 4 4 4 4
UNF 12 - - - - - - - - - - - -
8-UN 8 8 8 8 8 8 8 8 8 8 8 8 8
s Nominal Size 2-3/8 2-9/16 2-3/4 2-15/16 3-1/8 3-1/2 3-7/8 4-1/4 4-5/8 5 5/3-8 5-3/4 6-1/8
min 2.300 2.481 2.662 2.844 3.025 3.388 3.750 4.112 4.475 4.838 5.200 5.562 5.925
max 2.375 2.562 2.750 2.938 3.125 3.500 3.875 4.250 4.625 5.000 5.375 5.750 6.125
e min 2.622 2.828 3.035 3.242 3.449 3.862 4.275 4.688 5.102 5.515 5.928 6.341 6.755
max 2.742 2.959 3.175 3.392 3.608 4.041 4.474 4.907 5.340 5.774 6.207 6.640 7.073
m Nominal Size 1-15/32 1-19/32 1-23/32 1-27/32 1-31/32 2-13/64 2-29/64 2-45/64 2-61/64 3-3/16 3-7/16 3-11/16 3-15/16
min 1.433 1.556 1.679 1.802 1.925 2.155 2.401 2.647 2.893 3.124 3.370 3.616 3.862
max 1.505 1.632 1.759 1.886 2.013 2.251 2.505 2.759 3.013 3.252 3.506 3.760 4.014
m1 Nominal Size 27/32 29/32 31/32 1-1/32 1-3/32 1-13/64 1-29/64 1-37/64 1-45/64 1-13/16 1-15/16 2-1/16 2-3/16
min 0.808 0.868 0.929 0.989 1.050 1.155 1.401 1.522 1.643 1.748 1.870 1.990 2.112
max 0.880 0.944 1.009 1.073 1.138 1.251 1.505 1.634 1.763 1.876 2.006 2.134 2.264




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