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

Dimensions

Click table to show drawingHex Bolt Drawing
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
1/2 0.515 7/8 0.875 0.850 1.010 0.969 5/16 0.323 0.302 1.00
5/8 0.642 1-1/16 1.062 1.031 1.227 1.175 25/64 0.403 0.378 1.25
3/4 0.768 1-1/4 1.250 1.212 1.443 1.383 15/32 0.483 0.455 1.38
7/8 0.895 1-7/16 1.438 1.394 1.660 1.589 35/64 0.563 0.531 1.50
1 1.022 1-5/8 1.625 1.575 1.876 1.796 39/64 0.627 0.591 1.75
1-1/8 1.149 1-13/16 1.812 1.756 2.093 2.002 11/16 0.718 0.658 2.00
1-1/4 1.277 2 2.00 1.938 2.309 2.209 25/32 0.813 0.749 2.00
1-3/8 1.404 2-3/16 2.188 2.119 2.526 2.416 27/32 0.878 0.810 2.25
1-1/2 1.531 2-3/8 2.375 2.300 2.742 2.622 15/16 0.974 0.902 2.25

Dimensions per ASME B18.2.6 2003

Stock Structural Bolts

A325 Structural Bolt Size Plain Finish Part# Hot Dip Galvanized Part#
1/2 x 1-1/2 16076
1/2 x 1-3/4 16078
1/2 x 2 16080
5/8 x 1-1/2 16092
5/8 x 1-3/4 16094
5/8 x 2 16096
5/8 x 2-1/4 16098
5/8 x 2-1/2 16100
3/4 x 1-3/4 16123 16124
3/4 x 2 16125 16126
3/4 x 2-1/4 16127 16128
3/4 x 2-1/2 16129 16130
3/4 x 2-3/4 16132
3/4 x 3 16133 16134
7/8 x 2 16021 16022
7/8 x 2-1/4 16024
7/8 x 2-1/2 16025 16026
*Many other sizes available upon request