Newest FAQs

Galvanizing A320 Grade L7M Bolts

Can A320 Grade L7M bolts be hot-dip galvanized?

The A320 Grade L7M is a variation of the A320 Grade L7 specification used in low-temperature, low-pressure applications. Nowhere in the A230 specification does it discuss whether or not A320L7M fasteners can be galvanized. In theory, there is nothing preventing someone from galvanizing the material, however, the L7M designation comes from heat treating being the... Read more

Rust on Stainless Steel Nuts

Why are my stainless steel nuts rusting?

Stainless steel fasteners are often used in highly corrosive environments. When stainless nuts begin to rust, this can occur when hot forged nuts that are manufactured only to a material grade such as 18-8, SS304, and SS316 or to the ASTM A194 Grade 8 or 8M specifications. None of these steel grades or nut specifications... Read more

Clevis Grip

What is a clevis grip?

A clevis is a forged component at the end of a tie rod assembly that secures one end of a threaded rod to a structure. The “grip” of a clevis is the distance between the ears and is typically ¼” wider than the thickness of the connecting plate. This dimension is important so that the... Read more

Three Radial Lines on a Hex Bolt

I am replacing old 1-3/4” diameter hex bolts that are marked with 3 radial lines. What grade are these bolts?

The SAE J429 Grade 5 specification used to share the same head marking requirement as ASTM A449. A449 and Grade 5 are virtually identical both chemically and mechanically, but where the Grade 5 specification stops at 1-1/2” diameter, A449 continues up to 3”. They shared the three radial line head marking that Grade 5 still... Read more

Removing Barrier Pins

How are Portland Bolt barrier pins removed?

Portland Bolt manufactures both median barrier connecting pins and base stabilization pins for precast barriers used in many different states throughout the country. Although most states use a unique design for their pins, we have worked with several Departments of Transportation to approve our unique barrier pin. We designed the head of the pin to be... Read more

12′ Galvanized All Thread Rod Cut into Studs

Can 12 foot lengths of galvanized all thread rod be cut into studs?

Yes, 12’ sticks of hot-dip galvanized all thread rod can not only be cut to smaller lengths, but it is often preferred. Depending on the application, all thread rod studs vary in length. For this reason, it is most common for all thread rod to be stocked in 12’ sticks, which can then be cut... Read more

Fully Threaded Headed Bolts

Can Portland Bolt make fully threaded headed bolts?

It depends. To answer this question, we have to go into the details about the different ways to we can thread a bolt. As well as different head styles.  Roll Thread  We can thread to within 2” of the head. We can thread up to 1” diameter bolts that are mild steel, stainless steel, or... Read more

Restocking Fees at Portland Bolt

Why does Portland Bolt assess a restocking fee for returned materials?

If a Portland Bolt customer requests to return product, it is company policy to implement a 25% restocking fee. The reason for this charge is to cover the initial costs involved with processing the order. These costs include the salesperson’s time to quote and write the order, labor to pull and package the product, and... Read more

Economy Bolt

What is an Economy Bolt?

Economy bolt is an alternative name for what is most commonly referred to as a timber bolt. Some other names for this part are dome head, fender head, safety head, and mushroom head bolt. The economy bolt name is most common in the Pacific Northwest. This style of bolt is used in marine and wood... Read more

Stainless Steel Clevises

Are Type 304 stainless steel clevises available?

No, only Type 316 stainless steel clevis forgings are available off the shelf. Suppliers choose not to double inventory them since 316 stainless is virtually identical in strength to 304 stainless and provides more corrosion resistance. Type 304 stainless threaded rods are frequently supplied with Type 316 stainless clevises. If a 304 stainless clevis is... Read more