Heavy hex structural bolts are designed for steel-to-steel structural connections. Consequently, they are typically very short. The A325 and A490 specifications are not intended for general applications, including anchor bolts. In these applications, substitutions of A449 for A325 and A354 grade BD for A490 should be considered.

Manufacturing

Portland Bolt manufactures A325 and A490 heavy hex structural bolts from 1/2″ diameter through 1-1/2″ diameter, typically in lengths longer than those which are normally available in the marketplace.

Stock

Grade: A325 Type 1 diameters: 1/2 – 1″
Lengths: 5″ maximum
Origin: Domestic
Finish: Black and hot-dip galvanized

Bolt Length Tolerance

Nominal Bolt Size, in. 1/2 5/8 3/4 thru 1 118 thru 112
Nominal Bolt Length Tolerance of Length
Thru 6 in. -0.12 -0.12 -0.19 -0.25
Over 6 in. -0.19 -0.25 -0.25 -0.25

Structural Bolt Dimensions

Click table to show drawingstructural
Bolt Diameter D F C H T
Body Diameter Width Across Flats Width Across Corners Height Thread Length
Max Basic Max Min Max Min Basic Max Min Basic
12 0.515 78 0.875 0.850 1.010 0.969 516 0.323 0.302 1.00
58 0.642 1116 1.062 1.031 1.227 1.175 2564 0.403 0.378 1.25
34 0.768 114 1.250 1.212 1.443 1.383 1532 0.483 0.455 1.38
78 0.895 1716 1.438 1.394 1.660 1.589 3564 0.563 0.531 1.50
1 1.022 158 1.625 1.575 1.876 1.796 3964 0.627 0.591 1.75
118 1.149 11316 1.812 1.756 2.093 2.002 1116 0.718 0.658 2.00
114 1.277 2 2.00 1.938 2.309 2.209 2532 0.813 0.749 2.00
138 1.404 2316 2.188 2.119 2.526 2.416 2732 0.878 0.810 2.25
112 1.531 238 2.375 2.300 2.742 2.622 1516 0.974 0.902 2.25

Dimensions per ASME B18.2.6 2003

Stock Structural Bolts

Length Diameter
1/2" 5/8" 3/4" 7/8"
Black Galv. Black Galv. Black Galv. Black Galv.
112 - 16076 - 16092 - - - -
134 - 16078 - 16094 16123 16124 - -
2 - 16080 - 16096 16125 16126 16021 16022
214 - - - 16098 16127 16128 - 16024
212 - - - 16100 16129 16130 16025 16026
234 - - - - - 16132 - -
3 - - - - 16133 16134 - -
Other sizes available upon request