Search for:. Not sure what material is best for your application? Contact an Expert. Extreme bolt. Blog powered by WordPress. This is to accommodate the larger head and nut dimensions of the A and A structural bolts and 2H nuts. Many times, when structural bolts are used on harder steel joints, a flat washer is not used under the bolt head due to the wider heads of structural bolts.
However, the washers are used against the nut to provide a smoother surface to turn the nut. Many have thought that by using a wide USS flat washer, the load bearing surface area will be increased. This is only true with compressible materials and very thin joints; this is not true with steel joints. As Figure 3 illustrates, the loads will radiate slightly away from the flange at approximately the same angle as the flange.
This is because the flange washer is part of the nut or bolt head; otherwise, the load distribution is in the same vertical plane as the edge of the hex bolt head and hex nut. This is the only product that will increase the stress load distribution. It will work for some sizes but will be extremely tight against the larger bolt. This may interfere with the fillet area under the bolt head and cause possible increased head stresses and failure.
It is also recommended for use with Grade 5 8. He has held positions of engineering, manager of product marketing and quality systems.
Prior to his involvement with fasteners, he was heavily involved with metal coatings. A few years ago he began GT Technical Consultants serving as an expert witness for law firms, performing fastener training and failure analysis to a variety of industries, as well as ISO auditing and manual preparation. Guy may be contacted at ExpertBoltGuy gmail. At FMW Fasteners, we proudly serve a number of different types of customers, including do-it-yourself enthusiasts as well as B2B and B2C operations like construction companies, installers, manufacturers and more.
USS flat washers are a little bit different than fender washers, or more traditional washers. They offer a normal outer diameter but an inner diameter that is greater than what you would find with a fender washer.
USS stands for United States Standard, and USS flat washers were initially designed and developed to meet a wide range of common applications in the manufacturing industry. So what's the difference that distinguishes SAE vs. USS flat washers? Since SAE flat washers were created by the Society of Automotive Engineers to fulfill broad requirements within the automotive industry, they have a smaller outer diameter and thinner gauges than USS versions. These washers offer outer diameters, inner diameters and thicknesses that are designed for widespread use and stability, which is what makes them such a popular choice in most industrial applications in each field of manufacturing, repair and maintenance.
In practice, USS flat washers are placed under nuts or the heads of bolts to allow for rotation without distorting a surface.
0コメント