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Thread Pitch Chart. Thread series cover designations of diameter/pitch combinations that are measured by the number of threads per inch (TPI) applied to a single diameter. 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 ...
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. 2 Clampload is calculated at 75% of proofload. This is done to allow a ...
Hex / Heavy Hex Bolts. ASME B18.2.1 which covers hex, heavy hex, and square head bolts, states bolts 6″ in length and under have a thread length that is twice the diameter plus 1/4″. 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 ...
Phone: 503.219.6991. Email: dane@portlandbolt.com. How much thread engagement is recommended, i.e. how many threads should extend beyond the nut? Depending on your application, the answer could be anywhere from ¾ engagement, up to having two full threads extend beyond the nut. Look at these conflicting answers found in three separate technical ...
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 information gathering ...
With that said, A193 bolts can be ordered with UNC threads if that is specified when they are ordered. If a thread pitch is not specified, most fastener suppliers/manufacturers will supply this grade of bolt (A193 grade B7) with 8 threads per inch on bolts above 1″ in diameter. Most good suppliers will ask what thread pitch the customer wants ...
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 used where and engineer ...
This info and more on our specialized F1554 Microsite. The ASTM F1554 specification was introduced in 1994 and covers anchor bolts designed to anchor structural supports to concrete foundations. F1554 anchor bolts can take the form of either headed bolts, straight rods, or bent anchor bolts. The three grades 36, 55, and 105 designate the ...
Heavy hex structural bolts are designed for steel-to-steel structural connections. Consequently, they are typically very short. Unless otherwise specified, F3125 structural bolts will have a Unified National Coarse thread pitch. The F3125 Grades A325 and A490 specifications are not intended for general applications, including anchor bolts.
2.25. Dimensions per ASME B18.2.6 2011. In comparison, A193 Grade B7 heavy hex bolts follow a standard threading formula of 2 times the bolt diameter plus 1/4″ if 6” in length or less or plus 1/2″ if above 6” in length. As with the A325 specification, the A193 Grade B7 bolts can have different thread lengths if needed, but the bolts ...