NEXTACK NT800 16-inch Semi-Auto Rivet Nut Tool Kit with 12 Mandrels

For projects that need a secure, bolt-on attachment in metal or fibreglass, the NEXTACK NT800 installs threaded rivet nuts so you can fasten components with a bolt. Its 16-inch handles provide leverage for larger inserts, while the semi-automatic release makes it quicker to free a set insert than unscrewing it by hand.

Choose this kit when you need threaded inserts across a range of sizes, a pop-rivet tool is designed for a different type of fastening. The NT800 also comes with inserts and organized storage to keep the tool and its accessories together between jobs.

What to know

The NT800 is designed for heavy-duty rivnut work, with capacity up to 1/2-13 and M12. Its 12 interchangeable mandrels cover 8-32, 10-24, 10-32, 1/4-20, 5/16-18, 3/8-16, 1/2-13, M5, M6, M8, M10 and M12 thread sizes. That range helps when a project calls for different fasteners, whether you are working on a vehicle, bicycle, RV, home modification or metalworking task.

The kit includes 105 rivet nuts, a wrench and a manual, packed with the tool and mandrels in a rugged carrying case. The insert box is labelled for easier sorting. The tool has a reinforced aluminum alloy body, heat-treated Cr-Mo steel mandrels and non-slip grips. Its modular design lets you change mandrels without tools, which is useful when moving between insert sizes.

The release system works by opening and closing the handles repeatedly to release the installed nutsert, rather than manually unscrewing it from the tool. Buyers praise the tool’s function, build and included accessories, feedback is mixed on ease of use, durability and access in tight spaces.

Size & fit

At 16 inches, the handles are intended to provide extra leverage when setting larger rivet nuts. The kit’s listed insert sizes span metric options from M5 to M12 and imperial options from 8-32 to 1/2-13, giving you a broader range for projects that use different thread standards. Select the matching mandrel and insert for the fastener size required by your workpiece.

For example, the NT800 can suit a vehicle or RV modification where a bolt-on attachment is needed on a suitable metal panel. It can also be used on fibreglass, as described for the tool. This is a hand-operated threaded-insert setter, not a pop-rivet gun: its purpose is to create a threaded fastening point for a bolt.

Practical tips

Use the tool on a workpiece when getting familiar with the amount of handle movement and pressure needed, do not pull the tool in the air as a practice method. Apply less force with smaller rivnuts, since excess force can damage a mandrel. Even pressure helps avoid stressing the mandrel, and periodic lubrication of moving parts supports ongoing maintenance. The mandrels are consumable components, so careful alignment and use matter during installation.

The tool-free mandrel changes make it straightforward to switch sizes as a job progresses. Keeping the mandrels and labelled rivnut box in the carrying case also helps organize the kit when moving between a workshop and a project site.

Buying verdict

The NEXTACK NT800 is suited to DIY and workshop jobs that call for threaded inserts in several metric and imperial sizes, especially when larger rivnuts and added handle leverage are part of the task. Its 105-piece insert selection, 12 mandrels, semi-auto release and portable organized case bring the main tools for this kind of fastening job together in one kit.