Gary's FAQs

Stainless Grade 55 All Thread

Can I get stainless steel all thread rod in grade 55?

The reference to “Grade 55” is for getting a stainless steel all thread rod with a minimum yield strength of 55,000 psi.  There are currently no stainless steel specifications commonly stocked that will guarantee a 55,000 psi yield strength. The most commonly stocked grades of stainless all thread rod are A193, A320, and F593. The... Read more

F2329 Classes

Are there classes in the ASTM F2329 galvanizing specification similar to ASTM A153?

The A153 specification has 4 classes of material for hot-dip galvanizing: A. Castings – Malleable Iron, Steel B. Rolled, pressed, and forged articles C. Fasteners over 3/8” in diameter, washers 3/16” to 1/4” thickness D. Fasteners 3/8” inch in diameter and under, washers under 3/16” thick F2329 was created out of A153 to further define the... Read more

Weathering Steel F1554

Do F1554 anchor bolts come in weathering steel?

No they do not. F1554 is a carbon steel, carbon boron, alloy, or high-strength low-alloy specification. F1554 has 3 strength grades, 36, 55, and 105. These numbers correspond to the minimum yield strength required. If corrosion resistance is required, F1554 anchor bolts can be hot-dip galvanized to the F2329 specification. If weathering steel anchor bolts... Read more

Stainless A325

Can I get A325 bolts in stainless steel?

The short answer is, “No, you cannot match the A325 strength with stainless steel.” Some grades of strain hardened or quenched and tempered stainless steel fasteners will exceed the A325 strength requirements, but most standard stainless fasteners are not nearly as strong as A325 bolts.  These bolts are very different chemically.  Whereas stainless steels consist... Read more

Class 1 vs 2 Stainless

Is there a way to visually distinguish the difference between a Class 1 and Class 2 stainless steel bolt?

Yes there is. A193 and A320 grades B8 and B8M are assumed to be Class 1 unless otherwise specified. Class 1 fasteners are carbide solution treated, while class 2 fasteners are carbide solution treated and strain hardened. The work hardening that occurs in the manufacturing of Class 2 fasteners increases their strength. Class 2 fasteners are differentiated... Read more

B7 Hex Head Bolt

Fastener Marking Requirements

What are the product marking requirements for bolts?

Headed bolts are required to be stamped on top of the head, while most rods and some bent bolts are required to be stamped on one end. This Fastener Identification Markings Chart shows the various marking requirements for most common grades of ASTM and SAE fasteners. Headed Bolts ASTM specifications require a manufacturer’s identification and... Read more

A320 L7 Bolts in Slip Critical Connections

Can A320 L7 grade bolts be used for Slip Critical connections?

The grade of bolt used in a Slip Critical (SC) connection has no direct bearing on the connection itself, so the answer is yes. The SC connection means that it is a type of bolted structural steel connection which relies on friction between the two connected elements rather than bolt shear or bolt bearing to... Read more

Gary FAQ

Extending Thread Lengths

Can Portland Bolt add more thread to our existing bolts?

Basically, there are 3 different configurations of threads: Full-body cut thread Reduced-body rolled threads Full-body rolled threads Full Body Cut Thread Full body cut threads use full size round bar and the threads are cut into the steel. This is a commonly used method, especially on larger diameter product, long length product, and small quantity... Read more

Custom Submittal Drawings

Does Portland Bolt provide submittal drawings?

Yes we do. Our quoting program is designed to automatically send drawings with all items we quote. We can also create any other drawings you may need. Drawings minimize the possibility of both verbal miscommunication and written misinterpretation. Our drawings will define exactly what we are planning to supply and give you the ability to... Read more

Bolts Made from 44W Steel

Does Portland Bolt manufacture bolts from 44W steel?

Yes. 44W / 300W is the Canadian version of A36 steel, and is a grade within the CSA G40.21-04 specification. The Canadian Standards Association specification G40.21 covers structural quality steel plates, shapes, sheet, sheet piling, cold-formed channels, hollow sections, Z sections, and bars. 44W steel has slightly higher mechanical requirements than A36, which are summarized... Read more