![]() ![]() A small hex key was inserted into the threaded end to catch the part. The rivet nut was parted-off at the edge of the taper using a 1/16-inch-wide parting tool (left). ![]() Notice the countersink taper was formed using the shoulder of the insert. After threading, the next step was to turn the shank to 0.188-inch diameter (right). Then it was drilled to a depth of ¾ inch with a #36 drill bit and threaded to a depth of 3/8 inch with a 6-32 tap (center). After facing, the end was spot drilled (left). Since this particular screw was at eye level and a #10 screw is noticeably oversized compared to the surrounding screws (to me anyway), I decided to install a 6-32 rivet nut and forever end the problem of self-tapping screws coming loose. On the last inspection, one of the #8 screws was starting to loosen to the point where a #10 screw was needed. Going on 10 years, I’ve replaced all of the original #6 screws with #8 screws. It’s only natural that, over the years, the screws have started to loosen their grip in the thin fiberglass. The fairings come off at least once a year-during the condition inspection-to check the wing attachment bolts and fuel lines. The original builder attached the fairings with NAS548-style self-tapping screws threaded into the fiberglass skin. A good sketch always makes the shop work go faster.īoth reasons came into play when I needed to fix a worn-out screw hole for one of the wing root fairings on my Jabiru. And two, because the available choices may not be exactly what you need. ![]() So, with all these suppliers and choices, why make rivet nuts in the home shop? One, because they are easy to make. Using a drill bit to gauge the diameter of the screw hole for a rivet nut repair. These tend to be for automotive applications and will usually include a mix of metric and SAE inserts. You can also find rivet nut kits on Amazon and eBay. The prices range from 20 cents each to a dollar, depending on the style and size. They are available in two styles ( counterbore or countersunk), in various lengths and three thread choices: 6-32, 8-32 and 10-32. Note that the hole on the upper left is much larger than the one on the lower right.Īircraft grade blind rivet nuts are available from most aircraft parts suppliers, including Aircraft Spruce and Wicks Aircraft Supply (search “rivnuts”). Self-tapping screws in thin fiberglass tend to eventually strip out. Read more about Industrial Rivet’s product offerings.Blind rivet nuts, also called rivnuts, rivet nuts or insert nuts, are a clever way to add threaded bosses to thin-wall sheet metal structures or to anchor a threaded hardpoint to a composite skin (post cure). Plus, a vast manufacturing network means that Industrial Rivet is uniquely able to design, manufacture and engineer both custom and ready-made products, starting production quickly and giving clients access to lower-cost alternatives imported from the company’s overseas facilities, as well as products made exclusively in the U.S. The company also offers a wide range of proprietary riveting products, as well as sophisticated automated rivet tools and delivery systems. Industrial Rivet today has one of the industry’s largest inventories of off-the-shelf products that range from standard to highly specialized rivets, available in any head style, length, material and finish including: Some of the Benefits You Will Enjoy Include: Superior, Robust Product Set But our most important win is making you a happy, life-long customer. We have been around for over 100 years and won several awards for providing incredible service. We are dedicated to serving our customer’s needs by delivering solutions to industries world wide. CBS-CE Closed End Copper/Steel Dome Head.ACS-IR Open End Aluminum/Steel – Countersunk Head.SBS-IR Open End Steel/Steel Zinc Plated Dome Head. ![]()
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