Michael's FAQs

Tie Rod Attachment

How do tie rods attach to a structure?

Tie rods are attached by sliding a gusset plate, which is fastened to a structure, in between the ears of a clevis. A clevis pin or A325 structural bolt, is then assembled through the pin holes on the clevis and through the hole in the plate. A clevis is threaded onto either end of an... Read more

F1554 Head Stamping

Does ASTM F1554 require headed anchor bolts to be stamped on the head with the fastener’s grade symbol and manufacturer’s logo?

Stamping the heads of F1554 anchor bolts is not required per the ASTM Specification, but Portland Bolt chooses to do so to provide a secondary identification. Product Marking ASTM F1554 anchor bolts are marked on the threaded end that projects from the concrete with a designating color code, as is required by the specification.  Marking... Read more

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ASTM Specifications for Castings

What ASTM Specification covers castings?

There are several ASTM specs which cover castings, including A47, A48, A536, and A668. ASTM A47 A47 covers malleable castings intended for general use up to temperatures around 750⁰ Fahrenheit.  A47 castings come in one grade, available in metric and imperial. Common forgings specified to A47: Shear Plates, Beveled Washers ASTM A48 A48 covers gray... Read more

Large A490 Structural Bolts

Can I order A490 Heavy Hex Structural Bolts larger than 1-1/2" diameter?

According to ASTM A490-11, the answer is no. The A490 specification only covers diameters from 1/2″ to 1-1/2″, inclusive. An A490 bolt cannot be made above 1-1/2″ diameter; ASTM does not allow it. Since there are no chemical requirements, hardness requirements, or strength requirements for A490 fasteners above 1-1/2″ diameter, no manufacturer would be able... Read more

F1554-55 vs F1554-36

Can an F1554 Grade 55 anchor bolt be substituted for an F1554 Grade 36 anchor bolt?

Yes. According to ASTM F1554-15 when Grade 36 is specified, a weldable Grade 55 may be furnished at the supplier’s option. F1554 Grade 36 vs. F1554 Grade 55 F1554 is the ASTM specification for fasteners that have an intended use for anchoring structural supports to concrete foundations. The specification is available in three strength grades:... Read more

Hot-Dip Galvanizing Specifications

Does ASTM A123 apply to bolts and fasteners as a galvanizing specification?

ASTM A123 does not cover threaded bolts and fasteners. ASTM A153 and F2329 are the ASTM specifications that cover the requirements for hot-dip zinc coating of fasteners. ASTM A123 This specification covers the requirements for hot-dip galvanizing on iron and steel products made from rolled pressed and forged shapes, castings, plates, bars, and strips. It... Read more

Fastener Strength Terminology

What does yield, tensile, reduction of area, proof load, hardness, elongation, and shear mean in the context of fastener strength?

The following terms are measurements of strength that are commonly used in the fastener industry. All ASTM and SAE graded fasteners possess requirements for some or all of these strength characteristics. Our Strength Requirements by Grade Chart will provide a list of these strength requirements for each specification. Yield The yield strength or yield point of... Read more