Michael's FAQs


Does Portland Bolt assemble accessory hardware to bolts?

Unless instructed otherwise, Portland Bolt will ship nuts and washers unassembled from bolts, with a few exceptions: Tie Rod Assemblies Tie rod assemblies are commonly used in heavy timber construction and in erecting architectural and structural steel. The assemblies typically consist of a threaded rod with right hand thread on one end and left hand... Read more

F844 Plate Washers

Do Portland Bolt’s round plate washers meet the requirements of ASTM F844?

If a purchaser specifies an ASTM F844 washer with the dimensions of Portland Bolt’s plate washers, then the washers do meet the requirements of F844. According to ASTM F844, a specification for general use steel washers, the washer dimensions must conform to ASME B18.21.1, Type A, Tables 1A and Tables 1B, unless otherwise specified. The... Read more

Hex Nut

Hex vs. Heavy Hex Nuts

What is the difference between a standard hex nut and a heavy hex nut?

A standard hex nut, also referred to as a finished hex nut, has a smaller width across the flats and corners compared to a heavy hex nut, and a heavy hex nut is slightly thicker than a standard hex nut of the same nominal size. In fact, heavy hex nuts are exactly a 1/8” larger... Read more

Timber Bolt Head Nubs

I have to install timber bolts on a steel bearing surface. Am I able to order timber bolts without steel nubs underneath the heads?

Timber bolts, also referred to dome head bolts and as economy bolts in the Pacific Northwest, are designed with two nubs (or sometimes fins) on the underside of the head which bite into wood and prevent the head from spinning in the timber. The nubs under the head require a wood bearing surface to bite... Read more

Steel Racks

Steel vs. Fastener Specifications

Why is the steel on my mill test report a different specification than the bolts I ordered?

Steel is produced by rolling mills to specifications that cover steel shapes, plates, and bars.  Portland Bolt uses steel round bar to manufacture bolts to specifications that cover threaded fasteners. General steel specifications, such as ASTM A36 and A572 or AISI 1045 and 4140 are manufactured to specific chemical and (sometimes) mechanical requirements.  Heat analysis... Read more

Hex Lag Screw

Lag Screw vs Lag Bolt

What is the correct way to refer to a lag, screw or bolt?

Although these terms are used interchangeably, lags should be referred to as a screw and not as a bolt. A bolt is a fastener with machine thread that can accept a nut. A bolt is properly assembled and tightened by rotating the nut. A screw, on the other hand, is a fastener that is properly... Read more

Rush Lead Times

Can Portland Bolt expedite my order?

Yes, Portland Bolt can rush an order though production. Portland Bolt has what we recognize as “standard lead times.” These lead times consider the manufacturing processes required to complete an order. For instance, if we are going to manufacture a 1” x 36” hot-dip galvanized ASTM F1554 Grade 36 hex-head anchor bolt with 6” of thread,... Read more

State DOT Projects

Does Portland Bolt provide fasteners on Department of Transportation jobs?

Yes, Portland Bolt provides domestic fasteners with paperwork for DOT projects all over the US. We routinely have state inspectors from Oregon, Washington, and California in our facility inspecting and tagging orders for our customers. For contractors and steel fabricators in other states, we are able to ship the materials to the jobsite, or to... Read more

Torque for Stainless Steel

Why does Portland Bolt’s torque chart not have values for stainless steel fasteners?

Portland Bolt’s Torque Chart includes approximate torque values for fastener specifications made from carbon steel and alloy steel. We have chosen to exclude torque values related to fastener specification made from stainless steel. The primary reason we have decided to omit stainless fastener specifications from our torque chart is because we are unable to locate... Read more

Washers for Timber Bolts

Are timber bolts installed with a washer under the head of the bolt?

Timber bolts, also referred to as economy bolts in the Pacific Northwest, are designed with a round oversized head which eliminates the need for a washer underneath the head. The underside of the head has two nubs which bite into wood and prevent the head from spinning in the timber. The nubs under the head... Read more