![]() Rivet Nut Countersunk Knurled Closed End are available in diameters from M3 to M12 to suit various grip ranges.Īvailable at Fastenright in Zinc Plated Steel, A2 Stainless Steel and A4 Stainless Steel as standard. Installing these rivet nuts is simple, using a special tool with a threaded stud, or nose, that engages with the internal threads of the rivet nut and pulls upwards, deforming the unthreaded section of the rivet nut to expand under the reverse side of the material – providing a high strength permanent thread in a thin sheet material. The closed-end blocks any form of contamination getting to the component, and also prevents the use of screws that are too long for the application. The presence of the knurled body on the rivet nut provides greater resistance to movement within the application than knurling under the head, especially when installed in softer materials. Both types offer a flush, finished appearance to the application. Where the thickness of the application is smaller, the reduced countersunk type is often chosen instead. The full countersunk head is chosen over a reduced countersunk head type due to its stronger nature, however it is also deeper, meaning that it can only be used in material thicknesses greater than 1.5mm. What’s more, users can choose from corrosion-resistant options and a multitude of colors.Rivet Nut Countersunk Knurled Closed End, also referred to as Rivnuts, Blind Nuts and Nutserts®, are an internally threaded insert often used when the thickness of the application at hand is too small to tap a standard thread.īy using rivet nuts, a strong thread is created in thin sheets of material, for high strength fastening from bolts and other threaded articles. Our many product lines are designed to withstand the rigors of high vibrations, tampering, and aging. SFS manufactures blind rivets available in the United States, Canada, and internationally. Turn to SFS to find blind rivets of all sizes To see what sort of options are available, check out SFS’s rivet color chart. Avoid rivet materials that are highly vulnerable to corrosion and rust if you anticipate exposure to moisture.Ĭolor will obviously not impact the performance of the rivet, but it does influence the overall attractiveness of the project. However, if this is not an option, feel free to contact SFS for guidance on which material to use. Ideally, the material and alloy of the rivet are the same as the items you’re attaching. For example, if they choose to use blind rivets, they’ll find that the most common head design available is the “dome.” Additionally, if flush installation is a priority, contractors can only choose from “countersunk-head rivets” which are flush with the top surface. Still unsure about the proper size rivet for your needs? SFS can answer your questions and provide greater insights so you can move ahead with confidence.Ĭontractors will have a surprising number of head shapes from which to choose, though the needs of the project may limit their options. Most rivets will offer diverse grip ranges it’s best if your particular application thickness falls in the middle of this range rather than towards the minimum or maximum, if possible. Grip Range. Easily confused for the length of rivet, the grip range indicates the combined thickness of the fastened materials that the rivet is capable of connecting. The most common sizing for the rivet diameter is 1/8th of an inch. Note that diameter measurements refer to the size of the shank rather than the mandrel. Keep the following rivet measurement guidelines in mind:ĭiameter. Considering that most rivets need pre-drilled holes, you must measure accurately or else installation will be impossible. Ultimately, the more surface area behind the substrate, the stronger the connection. Access to both sides of the attached materials is required to hammer or “deteriorate” the ends for a tight clamp.Īs with all fasteners, rivets come in a full range of sizes. Solid rivets. The older of the two types, solid rivets is more simplistic in their design. ![]() The installer uses a riveting tool to push the rivet through a pre-drilled hole before drawing the mandrel out of the rivet so it acts like a cork on a bottle on the “blind side.” The exposed part of the mandrel then pops off to leave a clean look and strong connection. To understand how it works, it’s important to know that there are two main parts to the fastener: the body (the widest component) and the mandrel (the longest component). There are two main classifications of rivets, each with their own benefits.īlind rivets. As the name implies, the distinguishing characteristic of this type of rivet is the fact that contractors don’t need to access both sides of the fastened materials. See all Roofing Fasteners & Accessories.
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