Configurations

A354 has no limitations with regards to the configuration of the fasteners. The most commonly specified configurations are headed bolts (hex or heavy hex head), and rods (fully threaded or threaded both ends). Bent anchor bolts, u-bolts, or virtually any other type of externally threaded fastener could be manufactured if required.

Hex / Heavy Hex Bolt

Section 7.1 of ASTM A354 notes that, “unless otherwise specified, the bolts shall be hex head with dimensions conforming to the latest issue of ASME B18.2.1.” Often times however, due to A354 being a high strength fastener, heavy hex head bolts are specified.

Hex Bolt Dimensions

Click table to show drawing
Bolt Diameter D F C H
Body Diameter Width Across Flats Width Across Corners Height
Max Basic Max Min Max Min Basic Max Min
1⁄2 0.515 3⁄4 0.750 0.725 0.866 0.826 11⁄32 0.364 0.302
5⁄8 0.642 15⁄16 0.938 0.906 1.083 1.033 27⁄64 0.444 0.378
3⁄4 0.768 11⁄8 1.125 1.088 1.299 1.240 1⁄2 0.524 0.455
7⁄8 0.895 15⁄16 1.312 1.269 1.516 1.447 37⁄64 0.604 0.531
1 1.022 11⁄2 1.500 1.450 1.732 1.653 43⁄64 0.700 0.591
11⁄8 1.149 111⁄16 1.688 1.631 1.949 1.859 3⁄4 0.780 0.658
11⁄4 1.277 17⁄8 1.875 1.812 2.165 2.066 27⁄32 0.876 0.749
13⁄8 1.404 21⁄16 2.062 1.994 2.382 2.273 29⁄32 0.940 0.810
11⁄2 1.531 21⁄4 2.250 2.175 2.598 2.480 1 1.036 0.902
15⁄8 1.658 27⁄16 2.438 2.356 2.815 2.616 13⁄32 1.116 0.978
13⁄4 1.785 2-5/8 2.625 2.538 3.031 2.893 15⁄32 1.196 1.054
17⁄8 1.912 213⁄16 2.812 2.719 3.248 3.099 11⁄4 1.276 1.130
2 2.039 3 3.000 2.900 3.464 3.306 111⁄32 1.388 1.175
21⁄4 2.305 33⁄8 3.375 3.262 3.897 3.719 11⁄2 1.548 1.327
21⁄2 2.559 33⁄4 3.750 3.625 4.330 4.133 121⁄32 1.708 1.479
Dimensions per ASME B18.2.1

Heavy Hex Dimensions

Click table to show drawing
Bolt Diameter D F C H
Body Diameter Width Across Flats Width Across Corners Height
Max Basic Max Min Max Min Basic Max Min
1⁄2 0.515 7⁄8 0.875 0.850 1.010 0.969 11⁄32 0.364 0.302
5⁄8 0.642 11⁄16 1.062 1.031 1.227 1.175 27⁄64 0.444 0.378
3⁄4 0.768 11⁄4 1.250 1.212 1.443 1.383 1⁄2 0.524 0.455
7⁄8 0.895 17⁄16 1.438 1.394 1.660 1.589 37⁄64 0.604 0.531
1 1.022 15⁄8 1.625 1.575 1.876 1.796 43⁄64 0.700 0.591
11⁄8 1.149 113⁄16 1.812 1.756 2.093 2.002 3⁄4 0.780 0.658
11⁄4 1.277 2 2.00 1.938 2.309 2.209 27⁄32 0.876 0.749
13⁄8 1.404 23⁄16 2.188 2.119 2.526 2.416 29⁄32 0.940 0.810
11⁄2 1.531 23⁄8 2.375 2.300 2.742 2.622 1 1.036 0.902
15⁄8 1.658 29⁄16 2.562 2.481 2.959 2.829 13⁄32 1.116 0.978
13⁄4 1.785 23⁄4 2.750 2.662 3.175 3.035 15⁄32 1.196 1.054
17⁄8 1.912 215⁄16 2.938 2.844 3.392 3.242 11⁄4 1.276 1.130
2 2.039 31⁄8 3.125 3.025 3.608 3.449 111⁄32 1.388 1.175
21⁄4 2.305 31⁄2 3.500 3.388 4.041 3.862 11⁄2 1.548 1.327
21⁄2 2.559 37⁄8 3.875 3.750 4.474 4.275 121⁄32 1.708 1.479

Dimensions per ASME B18.2.1

Anchor Rods

A354 Grades BC and BD are often specified for anchor bolt applications. In these instances, typically they are designated as anchor rods. Anchor rods, also referred as anchor bolts, concrete embeds or foundation bolts, are embedded in concrete foundations and used in applications such as supporting structural steel columns, light poles, highway sign structures, and industrial equipment.

Anchor rods can take the form of straight rods with threads on both ends, or rods that are fully threaded.

All Thread Rod

All thread rods are used in a variety of construction applications. A few of the common ways all thread rods are used in the construction industry are as anchor bolts, as epoxy anchors, and for pipe flange connections.

All thread rod is readily available in most diameters in both A354 Grades BC and BD.

Other Configurations

A354 does not have any limitations with regards to the configuration of the fastener. If high strength material is required for a particular application, U-bolts, 90-degree bend anchor bolts, or headed bolts other than hex or heavy hex are able to be manufactured.