ASTM FAQs

Large Diameter ASTM A325 Bolts

Does Portland Bolt manufacture 1-3/4” diameter A325 heavy hex bolts?

No. As a matter of fact, nobody does. The ASTM F3125 grade A325 specification clearly denotes the diameter range of this grade of fastener to be ½” through 1-1/2” inclusive. Therefore, an A325 bolt larger than 1-1/2” diameter simply does not exist. It cannot be manufactured because there are no dimensional or strength requirements for... Read more

Imported ASTM A307 All Thread Rod

Does imported stock all thread rod meet ASTM A307 grade C?

Frequently, imported mild steel all thread rod will not meet ASTM A307 grade C. The three different grades of the A307 specification identify their intended application where grade C is embedded in concrete and used for anchoring purposes, grade B is used in cast iron flange connections, and grade A covers general applications. Normally, imported... Read more