DH Anco Pin-Lock Nut, Galvanized
DH Anco Pin-Lock Nut, Galvanized
Manufacturers:
Anco lock nuts are manufactured from heavy hex ASTM A563 Grade DH nuts that have an added stainless steel ratchet pin. The ratchet pin slides along the threads as the nut is threaded onto the bolt, which prevents the nut from backing off. The Anco style lock nut has an added feature in that the ratchet pin can be bent so that the nut can be removed, if needed. Dimensional specifications are governed by ASME B18.2.2. Available in hot dipped galvanized finish for corrosion resistance.
Products
Mechanical Properties
| Carbon & Alloy Steel | Per ASTM A563-2015 | |||
| Diameter | Proof Load Stress (1) | Core Hardness | ||
| ksi | Rockwell | |||
| Non Zinc- Coated (2) |
Zinc- Coated (2) |
Min | Max | |
| 1/4" thru 4" (3) | 175 | 150 | C24 | C38 |
- 1. To determine nut proof load in pounds, multiply the appropriate nut proof load stress by the tensile stress area of the thread.
- 2. Non-zinc-coated nuts are nuts intended for use with externally threaded fasteners which have a plain (nonplated or noncoated) finish or have a plating or coating of insufficient thickness to necessitate overtapping the nut thread to provide assemblability. Zinc-coated nuts are nuts intended for use with externally threaded fasteners which are hot-dip zinc-coated, mechanically zinc-coated, or have a plating or coating of sufficient thickness to necessitate overtapping the nut thread to provide assemblability.
- 3. Nuts made in accordance with the requirements of Specification A194/A194M, Grade 2H, and marked with its grade symbol are an acceptable equivalent for Grade DH nuts. When A194 zinc-coated inch series nuts are supplied, the zinc coating, overtapping, lubrication and rotational capacity testing shall be in accordance with Specification A563.
Governing Standards
| ASTM A563 | Covers the chemical and mechanical requirements for eight grades of carbon and alloy steel nuts for general structural and mechanical uses on bolts, studs, and other externally threaded parts. |
| ASME B18.2.2 | Covers the complete general and dimensional data for the various types of inch series square and hex nuts, including machine screw nuts and coupling nuts. |
| ASME B1.1 UNC & UNF Class 2B | Specifies the thread form, series, class, allowance, tolerance, and designation for unified screw threads. |
Grade DH Material Marking
Dimensional Specifications
| Per ASME B18.2.2-2015 | ||||||||||
| Nominal Diameter | UNC | F | G | H | ||||||
| Width Across Flats | Width Across Corners | Thickness | ||||||||
| Basic | Max | Min | Max | Min | Basic | Max | Min | |||
| 1/4 | 0.250 | 20 | 1/2 | 0.500 | 0.488 | 0.577 | 0.556 | 15/64 | 0.250 | 0.218 |
| 5/16 | 0.313 | 18 | 9/16 | 0.562 | 0.546 | 0.650 | 0.220 | 19/64 | 0.314 | 0.280 |
| 3/8 | 0.375 | 16 | 11/16 | 0.688 | 0.669 | 0.794 | 0.763 | 23/64 | 0.377 | 0.341 |
| 7/16 | 0.438 | 14 | 3/4 | 0.750 | 0.728 | 0.866 | 0.830 | 27/64 | 0.441 | 0.403 |
| 1/2 | 0.500 | 13 | 7/8 | 0.875 | 0.850 | 1.010 | 0.990 | 31/64 | 0.504 | 0.464 |
| 9/16 | 0.563 | 12 | 15/16 | 0.938 | 0.909 | 1.083 | 1.037 | 35/64 | 0.568 | 0.526 |
| 5/8 | 0.625 | 11 | 1 1/16 | 1.062 | 1.031 | 1.227 | 1.175 | 39/64 | 0.631 | 0.587 |
| 3/4 | 0.750 | 10 | 1 1/4 | 0.250 | 1.212 | 1.443 | 1.382 | 47/64 | 0.758 | 0.710 |
| 7/8 | 0.875 | 9 | 1 7/16 | 1.438 | 1.394 | 1.660 | 1.589 | 55/64 | 0.885 | 0.833 |
| 1 | 1.000 | 8 | 1 5/8 | 1.625 | 1.575 | 1.876 | 1.796 | 63/64 | 1.012 | 0.956 |
| 1 1/8 | 1.125 | 7 | 1 13/16 | 1.812 | 1.756 | 2.093 | 2.002 | 1 7/64 | 1.139 | 1.079 |
| 1 1/4 | 1.250 | 7 | 2 | 2.000 | 1.380 | 2.309 | 2.209 | 1 7/32 | 1.251 | 1.187 |
| 1 3/8 | 1.375 | 6 | 2 3/16 | 2.188 | 2.119 | 2.526 | 2.416 | 1 11/32 | 1.378 | 1.310 |
| 1 1/2 | 1.500 | 6 | 2 3/8 | 2.375 | 2.300 | 2.742 | 2.622 | 1 15/32 | 1.505 | 1.433 |
| 1 5/8 | 1.625 | 5 1/2 | 2 9/16 | 2.562 | 2.481 | 2.959 | 2.828 | 1 19/32 | 1.632 | 1.556 |
| 1 3/4 | 1.750 | 5 | 2 3/4 | 2.750 | 2.662 | 3.175 | 3.035 | 1 23/32 | 1.759 | 1.679 |
| 1 7/8 | 1.875 | 5 | 2 15/16 | 2.938 | 2.844 | 3.392 | 3.242 | 1 27/32 | 1.886 | 1.802 |
| 2 | 2.000 | 4 1/2 | 3 1/8 | 3.125 | 3.025 | 3.608 | 3.449 | 1 31/32 | 2.013 | 1.925 |
| 2 1/4 | 2.250 | 4 1/2 | 3 1/2 | 3.500 | 3.388 | 4.041 | 3.862 | 2 13/64 | 2.251 | 2.155 |
| 2 1/2 | 2.500 | 4 | 3 7/8 | 3.875 | 3.750 | 4.474 | 4.275 | 2 29/64 | 2.505 | 2.401 |
| 2 3/4 | 2.750 | 4 | 4 1/4 | 4.250 | 4.112 | 4.907 | 4.688 | 2 45/64 | 2.759 | 2.647 |
| 3 | 3.000 | 4 | 4 5/8 | 4.625 | 4.475 | 5.340 | 5.102 | 2 61/64 | 3.013 | 2.893 |
| 3 1/4 | 3.250 | 4 | 5 | 5.000 | 4.838 | 5.774 | 5.515 | 3 3/16 | 3.252 | 3.124 |
| 3 1/2 | 3.500 | 4 | 5 3/8 | 5.375 | 5.200 | 6.207 | 5.928 | 3 7/16 | 3.506 | 3.370 |
| 3 3/4 | 3.750 | 4 | 5 3/4 | 5.750 | 5.562 | 5.562 | 6.341 | 3 11/16 | 3.670 | 3.616 |
| 4 | 4.000 | 4 | 6 1/8 | 6.125 | 5.925 | 5.925 | 6.755 | 3 15/16 | 4.014 | 3.862 |
- All dimensions are in inches.
Chemical Properties
| Per ASTM A563-2015 | |||||
| Grade | Material | Carbon | Manganese | Phosphorus | Sulfur |
| % by weight | % by weight | % by weight | % by weight | ||
| DH (1) | Carbon & Alloy Steel | 0.20-0.55 | 0.60 | 0.04 | 0.05 |
- 1. For Grade DH a sulfur content of 0.05 – 0.15 % is acceptable provided the manganese is 1.35 % min.