Structural Bolts Specification | Structural Bolts - Structural Bolts Techinical Information | Structural Bolts Dimensions
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Fasteners Specification

Structural Bolts

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

Ramesh Steel Corporation 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 1-1/8 thru 1-1/2
Nominal Bolt Length Tolerance of Length
Thru 6 in.
Over 6 in.
-0.12
-0.19
-0.12
-0.25
-0.19
-0.25
-0.25
-0.25

Dimensions

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

 

Fasteners Specification :

   

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