![]() ![]() Make wide, blind-side bearing surfaces possible.This could include using Grade 2 and Grade 5 bolts to further improve the assembly’s clamp load, pull-out, and overall joint strength. ![]() However, by using rivet nuts, a user can select the ideal clamp load for one material (such as plastics), and then set a different torque or clamp for the joined assembly (say, plastics that are mounted to a steel frame). The clamp load is limited by the strength of the joined materials, the fastener, and the threads’ ability to tighten - and especially when joining dissimilar materials. Oftentimes materials, such as plastics, can be weakened by a bolt’s clamp load. Similar to pull-out, torque-out refers to the amount of torque necessary to spin (rather than pull) a fastener out of an application. A rivet nut’s head and body design allow for the joining of dissimilar materials, which increases the pull-out and torque-out. Maintaining the rigidity of the joined materials is also imperative to joint strength and a reliable hold.Īn inserted (left) and installed (right) rivet nut in an area with a very tight clearance, which would be difficult to achieve with other fasteners. This prevents the weakening of substrates due to vibration over time. Compared to the use of a screw or bolt alone, rivet nuts radially swell to the shape of a hole. These components also offer the ease of assembly necessary to significantly improve pull-out. A conventional bolt and nut may provide sufficient features for pull-out strength, but fail to provide the ease of assembly or strength required for most blind applications.Īlternatively, rivet nuts offer thread engagement and a reliable bearing-surface area and clamp force. In thin sheet metal, tapping, thread cutting, and thread forming screws have limited thread contact and engagement with the radial wall. Pull-out forces are first determined by the ability of a fastener’s threads to withstand the load applied to it, followed by the bearing surface area and the joints’ clamp force.
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