A325 Bolts


We stock import and domestic A325 bolts. A325 bolts are heavy hex structural bolts designed for connecting steel to steel. These bolts differ from standard hex bolts in that they have heavy hex heads (thicker and wider to more effectively distribute the load) and shorter thread lengths (the weakest portion of carbon steel fasteners is the threaded portion so shorter thread lengths creates a stronger bolt) to increase their strength.

A325 bolts are available in diameters ranging from 1/2″ to 1 1/2″  and from 1 1/4″ to 12″ in length. Tensile strengths are 120 ksi for 1/2″ to 1″ in diameter and 105 ksi for 1″ to 1 1/2″. A325 bolts come in plain finish or galvanized and require heavy hex nuts: ASTM A563 grade C or DH nuts are acceptable, and F436 hardened washers. ASTM A194 grade 2H nuts are an alternative as are ASTM F959 compressible-washer-type direct-tension indicator washers.

We stock many standard sizes of A325 bolts in plain or hot dip galvanized including the following most commonly requested sizes:
3/4″ x 1 3/4″ A325 bolts
3/4″ x 2″ A325 bolts
3/4 x 2 1/2″ A325 bolts

We stock many other sizes and can get any size that we don’t have in stock. Atlantic Bolt also has material test reports (MTRs) on file digitally for all our structural bolts. Structural bolt lot tracing is a high priority at Atlantic Bolt and certifications and test reports are provided free of charge upon request.

Questions? Contact us using our contact form, email or call us 704-597-5082

(In 2016 the ASTM introduced the new umbrella specification F3125. F3125 encompasses six other ASTM standards, including A325, A325M, A490, A490M, F1852, and F2280. Currently, the F3125 specification is slightly less known and the A325, A325M, A490, A490M, F1852, and F2280 specifications are still how our customers refer to these bolts. As such, until the ASTM removes the A325, A325M, A490, A490M, F1852, and F2280 standards, we will continue to use the existing A325, A325M, A490, A490M, F1852, and F2280 specifications to reference these bolts.)