Mike's FAQs

Large Diameter ASTM F1554

Can F1554 Grade 105 Anchor Bolts Be Made Above 3” Diameter?

ASTM specifies the diameter range for F1554 grade 105 anchor bolts as ½” through 3”. What are the options for anchor bolts larger than 3” diameter of similar strength? Because the diameter range is clearly defined as ½” through 3” in the F1554 specification, an anchor bolt larger than 3” diameter can’t be certified to... Read more

Stainless Yield & Tensile Strength

What are the strength and yield values for stainless steel bolts?

Typically when bolts are ordered, they are called out by a specific ASTM or SAE grade. Stainless steel bolts are a bit different though, as they are commercially available and regularly ordered simply by the material itself, most commonly 316 or 304 stainless steel. Unlike bolts that fall under ASTM specifications, there are no specific... Read more

Sales Tax

Does Portland Bolt Collect Sales Tax?

While providing bolts to every state in the United States, we are often questioned as to why we don’t include taxes on our quote and invoices. The state of Oregon, where Portland Bolt is based, is one of five states in the U.S. that does not have a sales tax. Therefore, any invoice from Portland... Read more

Clevis Numbers

Why are clevises called out by a number?

Clevises are a component of tie rod assemblies that rods thread into. Unlike most other female threaded components such as nuts or turnbuckles, calling out a clevis size by the diameter of rod being threaded into it is not the correct way to reference it. Clevises are called out by a number, ranging from a... Read more

Bolt Length

Does the length measurement of a bolt include the head?

In most cases, when specifying the length of a headed bolt, the thickness of the bolt head is not included. For instance, if you were to order a ¾” x 24” hex head bolt, the bolt would measure 24” from under the head. One exception to this method of measurement is countersunk bolts. When specifying... Read more

F1554 Configuration

Does F1554 Tell Me the Configuration of the Bolt?

Calling out ASTM F1554 (grade 36, 55, or 105) indicates the grade of material, but the specification itself does not require a specific configuration and does not indicate whether or not the bolt is galvanized. F1554 is a fastener specification which covers steel anchor bolts intended for anchoring structural supports to concrete foundations. The specification provides... Read more

A325 Testing

Is rotational capacity testing required for A325 bolts?

Rotational capacity testing  a test “intended to evaluate the presence of lubricant, the efficiency of lubricant, and the compatibility of assemblies.” The test is intended primarily for galvanized fasteners, and fasteners that must be fully tensioned in structural applications. With A325 bolts now falling under the new F3125 specification, which covers high strength structural bolts,... Read more

Online Ordering

Why doesn’t Portland Bolt have an ecommerce website where I can place orders on line?

While we’ve made it very easy to submit an inquiry online, we don’t have a system that allows a purchase to be made online through a few simple clicks or an online listing of prices. Portland Bolt is a manufacturer of nonstandard construction bolts, which does not lend itself to an ecommerce site. While there... Read more

ANSI B18.2.1

What is ANSI B18.2.1?

Often times, ANSI (American National Standards Institute) or ASME (American Society of Mechanical Engineers)  B18.2.1 will show up on a drawing, some certification documents, and even our website . This number simply refers to dimensional standards for a variety of common bolts, such as hex bolts, heavy hex head bolts, and square head bolts. Most... Read more


What is AASHTO an Acronym For?

AASHTO is the American Association of State Highway and Transportation Officials. This organization sets standards for highway design and construction. As it relates to bolts, often times, bolts and other materials will be shown on plans for state transportation projects as having an AASHTO designation. These AASHTO numbers typically will correlate directly to a particular... Read more