Leader-Fastener® is a manufacturer and distributor of ASME B18.2.2 Castle 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.
Leader-Fastener® ASME B18.2.2 Castle nut from Leader Fastener come with pre-drilled holes through which cotter pins can be inserted to hold the nuts securely in place. This gives the nuts the ability to withstand constant vibrations and allows them to stay in place during small movements. As these nuts are pre-drilled, they can be used without a pilot hole. These nuts are slotted, allowing it to be installed and removed using screwdrivers. It is available in stainless steel, carbon steel, and alloy steel to bear more wear and tear while also making it more corrosion resistant.
Material : Carbon steel, Stainless steel, Alloy Steel, Brass.
Finishment: Black, Zinc Plated, Zinc Yellow, HDG, Phosphate, DACROMET, Geomet, Magin, Ruspert, Teflon, etc.
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 | |
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 | |
PP | UNC | 20 | 18 | 16 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 7 |
UNF | 28 | 24 | 24 | 20 | 20 | 18 | 18 | 16 | 14 | 12 | 12 | 12 | |
8-UN | - | - | - | - | - | - | - | - | - | - | 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 |
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 | |
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 | |
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 |
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 | |
k | 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 |
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 | |
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 | |
w | min | 0.13 | 0.19 | 0.22 | 0.26 | 0.32 | 0.35 | 0.38 | 0.47 | 0.59 | 0.69 | 0.75 | 0.83 |
max | 0.15 | 0.21 | 0.24 | 0.28 | 0.34 | 0.37 | 0.40 | 0.49 | 0.62 | 0.72 | 0.78 | 0.86 | |
n ① | min | 0.07 | 0.09 | 0.12 | 0.12 | 0.15 | 0.15 | 0.18 | 0.18 | 0.18 | 0.24 | 0.24 | 0.31 |
max | 0.10 | 0.12 | 0.15 | 0.15 | 0.18 | 0.18 | 0.24 | 0.24 | 0.24 | 0.30 | 0.33 | 0.40 |
Screw Thread | 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 | 1.3750 | 1.5000 | 1.7500 | 2.0000 | 2.2500 | 2.5000 | 2.7500 | 3.0000 | 3.2500 | 3.5000 | 3.7500 | 4.0000 | |
PP | UNC | 6 | 6 | 5 | 37988 | 37988 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
UNF | 12 | 12 | - | - | - | - | - | - | - | - | - | - | |
8-UN | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | |
s | Nominal Size | 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 | 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 | 2.188 | 2.375 | 2.750 | 3.125 | 3.500 | 3.875 | 4.250 | 4.625 | 5.000 | 5.375 | 5.750 | 6.125 | |
e | min | 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 | 2.526 | 2.742 | 3.175 | 3.608 | 4.041 | 4.474 | 4.907 | 5.340 | 5.774 | 6.207 | 6.640 | 7.073 | |
k | Nominal Size | 1-11/32 | 1-15/32 | 1-23/32 | 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 | 1.310 | 1.433 | 1.679 | 1.925 | 2.155 | 2.401 | 2.647 | 2.893 | 3.124 | 3.370 | 3.616 | 3.862 | |
max | 1.378 | 1.505 | 1.759 | 2.013 | 2.251 | 2.505 | 2.759 | 3.013 | 3.252 | 3.506 | 3.760 | 4.014 | |
w | min | 0.95 | 1.01 | 1.20 | 1.38 | 1.62 | 1.74 | 1.99 | 2.17 | 2.41 | 2.65 | 2.90 | 3.15 |
max | 0.99 | 1.05 | 1.24 | 1.43 | 1.67 | 1.79 | 2.05 | 2.23 | 2.47 | 2.72 | 2.97 | 3.22 | |
n ① | min | 0.31 | 0.37 | 0.43 | 0.43 | 0.43 | 0.55 | 0.55 | 0.62 | 0.62 | 0.62 | 0.62 | 0.62 |
max | 0.40 | 0.46 | 0.52 | 0.52 | 0.52 | 0.64 | 0.64 | 0.71 | 0.71 | 0.71 | 0.71 | 0.71 |
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 | 0.2500 | 0.3125 | 0.3750 | 0.4375 | 0.5000 | 0.5625 | 0.6250 | 0.7500 | 0.8750 | 1.0000 | 1.1250 | 1.2500 | 1.3750 | 1.5000 | |
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 | 0.982 | 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 | 7/32 | 17/64 | 21/64 | 3/8 | 7/16 | 31/64 | 35/64 | 41/64 | 3/4 | 55/64 | 31/32 | 1-1/16 | 1-11/64 | 1-9/32 |
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 | 1.245 | |
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 | 1.317 | |
w | min | 0.12 | 0.16 | 0.19 | 0.21 | 0.27 | 0.29 | 0.32 | 0.38 | 0.49 | 0.56 | 0.61 | 0.67 | 0.78 | 0.82 |
max | 0.14 | 0.18 | 0.21 | 0.23 | 0.29 | 0.31 | 0.34 | 0.40 | 0.52 | 0.59 | 0.64 | 0.70 | 0.82 | 0.86 | |
n | min | 0.07 | 0.09 | 0.12 | 0.12 | 0.15 | 0.15 | 0.18 | 0.18 | 0.18 | 0.24 | 0.24 | 0.31 | 0.31 | 0.37 |
max | 0.10 | 0.12 | 0.15 | 0.15 | 0.18 | 0.18 | 0.24 | 0.24 | 0.24 | 0.30 | 0.33 | 0.40 | 0.40 | 0.46 |
d | 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 | 0.2500 | 0.3125 | 0.3750 | 0.4375 | 0.5000 | 0.5625 | 0.6250 | 0.7500 | 0.8750 | 1.0000 | 1.1250 | 1.2500 | 1.3750 | 1.5000 | |
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 | 0.982 | 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 | |
k | 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 | |
w | min | 0.18 | 0.22 | 0.27 | 0.29 | 0.40 | 0.41 | 0.49 | 0.55 | 0.64 | 0.70 | 0.80 | 0.86 | 0.98 | 1.04 |
max | 0.20 | 0.24 | 0.29 | 0.31 | 0.42 | 0.43 | 0.51 | 0.57 | 0.67 | 0.73 | 0.83 | 0.89 | 1.02 | 1.08 | |
n | min | 0.07 | 0.09 | 0.12 | 0.12 | 0.15 | 0.15 | 0.18 | 0.18 | 0.18 | 0.24 | 0.24 | 0.31 | 0.31 | 0.37 |
max | 0.10 | 0.12 | 0.15 | 0.15 | 0.18 | 0.18 | 0.24 | 0.24 | 0.24 | 0.30 | 0.33 | 0.40 | 0.40 | 0.46 |