NEXTACK NT600 Rivet Nut Tool Kit with Step Drill, 160 Inserts and 8 Mandrels

The 8-inch NEXTACK NT600 is a hand-operated rivet nut tool kit designed for confined or hard-to-reach work areas. Its right-angle style helps bring the tool into narrow spaces where a longer-handled approach may be awkward. Could a compact tool make it easier to add a threaded attachment point? The NT600 combines the riveter with a step drill bit, interchangeable mandrels and an organized carrying case.

Who it’s for

This kit suits home DIYers and mechanics adding threaded inserts to metal or fibreglass workpieces. It can be used for projects such as van walls, bicycles, RV modifications and general metalworking, as well as railway or aviation applications. The compact form is especially useful when access is limited and a bolt-on attachment point is needed. It’s a good fit if you want a hand tool and a range of SAE and metric mandrels together, rather than assembling a kit one component at a time.

The tool is designed for single-hand operation and has thick, non-slip grips. Small aluminium rivnuts are a stated use, larger M6 and 1/4-20 inserts call for grip strength. For a drilling-and-installing workflow, the included step drill bit is suitable for workpieces under 3.5 mm thick.

Tech specs

• Type: Hand-operated rivet nut tool kit
• Model: NT600
• Tool size: 8 inches
• Mandrels: M3, M4, M5, M6, 6-32, 8-32, 10-24 and 1/4-20
• Included: Step drill bit, 160 carbon steel threaded nuts, 8 interchangeable mandrels, user manual and storage case
• Materials: Heat-treated Cr-Mo steel mandrels, heat-treated medium-carbon steel handles and reinforced aluminium-alloy body
• Step drill bit: For workpiece thickness below 3.5 mm

Strengths

The NT600 brings the main pieces for fitting threaded inserts into one organized case, making it practical to carry between jobs and keep the mandrels together. Its modular design supports mandrel changes and maintenance, while the rotary knob helps load and release a nut. The riveter stroke can also be adjusted for larger rivnuts by loosening the adjustment nut and turning the outer sleeve clockwise to increase the exposed mandrel threads.

The tool’s construction combines steel mandrels and handles with a reinforced aluminium-alloy body and non-slip grips. Buyers particularly appreciate having a selection of inserts and mandrels included, feedback on ease of use, durability and access in tight spaces is mixed. Choose the correct mandrel for the insert, keep pressure even, and practise the pulling action before starting on the workpiece. Mandrels are consumable and can be damaged by uneven pressure or improper use.

Questions before you buy

Which insert sizes does the kit support? It includes mandrels for M3, M4, M5, M6, 6-32, 8-32, 10-24 and 1/4-20 inserts. The stated metric thread pitches are 0.5 mm for M3, 0.7 mm for M4, 0.8 mm for M5 and 1 mm for M6.

What is the step drill bit intended for? It is supplied for drilling workpieces under 3.5 mm thick as part of the insert-installation process.

Can the stroke be adjusted? Yes. Loosen the adjustment nut, then turn the outer sleeve clockwise to increase the number of mandrel threads extending beyond the nosepiece.

Final verdict

For projects that need threaded attachment points in a compact work area, the NT600 brings an 8-inch hand riveter, eight SAE and metric mandrels, 160 threaded nuts and a step drill bit together in a portable case. Its size and included range make it a practical kit for DIY and workshop jobs involving metal or fibreglass.