Coarse Thread Series (UNC/UNRC) is the most common designation for general application bolts and nuts. Coarse thread is beneficial, because they are less likely to cross thread, more tolerant in adverse conditions and facilitate quick assembly. Fine Thread Series (UNF/UNRF) is commonly used in precision applications. Because of the larger ...

Jun 15, 2023 · Bolts that are longer than 6″ have a thread length of twice the diameter plus 1/2″. For example, a 1/2 x 6 hex bolt will have 1-1/4″ of thread, whereas a 1/2 x 6-1/2 hex bolt will have 1-1/2″ thread. In our experience, most “off the shelf bolts” that are longer than 12″ have 6″ of thread. Structural Bolts

Our suite of comprehensive technical tools is designed specifically to provide engineers, architects, and the construction industry with a one-stop shop for technical fastener information. At Portland Bolt, we understand your profession’s unique challenges and demands, which, is why we’ve developed a range of tools to streamline your workflows, enhance precision in …

Portland Bolt manufactures A325 and A490 heavy hex structural bolts from 1/2″ diameter through 1-1/2″ diameter, typically in lengths longer than those which are normally available in the marketplace.

May 10, 2024 · 8-Thread Series (8UN) The 8-thread series is characterized by 8 threads per inch regardless of diameter and is generally used on diameters 1” and larger. It is primarily used with bolt specifications A193 and A320, where the bolt will be used in high-pressure and/or high temperature joint applications. However, the 8-thread series is also ...

Standard Thread Length. Bolt lengths ≤ 6″: Thread length = (2 X diameter) + 1/4″ Bolt lengths > 6″: Thread length = (2 X diameter) + 1/2″ Note: Most stock hex bolts 10″ and longer will have 6″ of thread. Hex Bolt Dimensions

1 Proofload is the published number that full size headed bolts are tested to. The bolt is stressed up to the proofload value, and if there is no deformation, elongation, or fracture, then the bolt is deemed to have passed. For bolting specifications that do not have a published proofload, it is usually calculated at 92% of minimum yield strength.

Portland Bolt stocks A325 Heavy Hex Structural Bolts. Standard Thread Lengths. Bolt lengths ≤ 6″: Thread length = (2 X diameter) + 1/4″ Bolt lengths > 6″: Thread length = (2 X diameter) + 1/2″ Heavy Hex Dimensions

S3: Permanent grade identification on the end of the anchor bolt that projects from the concrete, in lieu of color-coding. S4: Charpy Impact requirements at +40⁰F (+5⁰C) for grades 55 and 105. The minimum Charpy V-notch energy requirement is an average of 15ft-lbs for three specimens, with no one specimen falling below 12ft-lbs. Charpy ...

Oct 27, 2014 · For ASTM A193 B7 1″ diameter bolt/stud which is the correct? ASTM A193 B7 1″-8UNC or ASTM A193 B7 1″-8UN. Portland bolt website has it listed both ways as an standard. Below is text from Portland Bolt website: 8 – Thread Series (8UN) is the specified thread forming method for several ASTM standards including A193 B7, A193 B8/B8M, and A320.