Tools & DIY 7 Rivet Nut Tools for Strong Threaded Inserts
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By the Pickpedia Team
·7 picks compared
·Last verified October 2026
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Quick answer
Pick a rivet nut tool by how you work. Hand kits suit occasional jobs and small threads, while drill adapters speed up repetitive fastening. Match your thread sizes, check whether mandrels swap without extra tools, and confirm the kit covers both metric and inch nuts you actually use.
7 Rivet Nut Tools for Strong Threaded Inserts at a glance
Why you can trust this guide
We compared these picks using verified manufacturer specifications, available manuals and documentation, current retailer listings, and patterns in owner feedback, alongside editorial research. We focus on measurable differences such as performance, capacity, usability, and build quality. Pickpedia does not present editorial research as laboratory testing, and we do not claim hands-on testing unless it was actually performed.
How we chose: We compared 7 rivet nut tools across mandrel range, changeover ease, drill versus hand operation, and the assortment of nuts each ships with.
Rivet nuts let you set strong threaded inserts into thin or soft panels where a backing nut will not fit. The right tool depends on volume, thread sizes, and whether you prefer a hand squeeze or a drill driving the work. Owners weigh mandrel breakage, changeover speed, and how many nuts arrive ready to use.
Each option below leans a different way. Some prioritize a wide mandrel spread, others focus on protecting fragile threads or turning an existing drill into a fast setter. Read the honest limitation noted for each before you decide, since no single kit wins every scenario.
Our top picks
GIANTISAN covers the widest thread spread here, with 15 mandrels spanning M3 through M12 plus common inch sizes and 406 assorted rivnuts. Heads swap toollessly, so changeovers take seconds without hunting for small parts. Built from thick carbon steel with heat treatment and high strength aluminum alloy, reviewers describe it as sturdy across automotive, fabrication, marine, and home projects. The 16 inch handles give leverage for larger nuts, though that length makes tight interior spaces awkward. Owners report the organized storage keeps the many mandrels tidy. For someone juggling both metric and inch work, this is the most flexible pick in the group.
Mandrels15 (M3 to M12 plus inch)
Nut count406 pieces
Handle length16 inches
Buildcarbon steel and aluminum alloy
Pros
- Widest mandrel range covering metric and inch
- Toolless head changes save time
- Long handles add leverage for large nuts
Cons
- Long handles feel bulky in tight spaces
- Many mandrels mean more parts to keep track of
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ASKWAY leans into a large press-fit nut supply, shipping 430 pieces across five metric threads from M3 up to M8. The carbon steel nuts are galvanized to resist rust in long storage, and a knurled flat head design helps prevent slipping once set. Reviewers note the transparent labeled storage box keeps sizes sorted for home decoration, car repairs, furniture, and sheet metal work. Based on specifications this is a manual pressure setup rather than a drill driven one, so high-volume users may find repeated hand effort tiring on larger nuts. It suits someone who wants a broad metric stock ready to go.
Nut count430 pieces
Thread sizesM3, M4, M5, M6, M8
Materialgalvanized carbon steel
Storagelabeled clear box
Pros
- Large stock of metric nuts across five sizes
- Galvanized nuts resist rust in storage
- Sorted, labeled storage box for quick size access
Cons
- Manual pressure design tires the hand on larger nuts
- Metric only, no inch threads included
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HARDELL focuses on protecting your hardware with a force arm controller that meters handle opening to guard against broken mandrels and stripped threads. Fast-change mandrels swap tip-free in seconds, and color coding lets you grab the right size without squinting at tiny numbers. The soft grip handle and balanced leverage need only an easy squeeze for full setting power, which reviewers say helps both pros and newcomers. Thickened, heat treated carbon steel and aluminum alloy round out the build. It ships with 6 mandrels and 80 nuts, a smaller assortment than rivals, so heavy users may need to buy extra nuts sooner. A confidence builder for careful work.
Mandrels6 (M6 to 3/8-16)
Nut count80 pieces
Handle length14 inches
Featureforce arm overpress control
Pros
- Force arm control reduces broken mandrels
- Color-coded, fast-change mandrels
- Soft grip needs only an easy squeeze
Cons
- Only 80 nuts and 6 mandrels included
- Narrower size range than larger kits
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VLOXO turns a standard drill into a rivet nut setter through a hex rod socket, and the same adapter runs off a ratchet wrench for manual use. It includes 13 heads spanning M3 to M10 and several inch threads, with 245 nuts to match, so most common jobs are covered out of the box. Reviewers note it handles aluminum, steel, and stainless rivets across construction, maintenance, and handmade work. The maker recommends an 18V to 24V drill with a torque limiting clutch, and 5 to 6mm nuts are not advised for steel or stainless, which narrows some uses. A flexible choice for anyone who owns a capable drill.
Heads13 (M3 to M10 plus inch)
Nut count245 pieces
Operationdrill or ratchet wrench
Drill spec18V to 24V with torque clutch
Pros
- Works with a drill or manual ratchet
- Handles aluminum, steel, and stainless rivets
- 13 heads cover metric and inch threads
Cons
- Needs an 18V to 24V drill with torque clutch
- Small nuts not advised for steel or stainless
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WelderElite keeps things compact, turning your drill into a rivet nut inserter for fast repeated fastening. The kit carries 290 nuts and 13 riveting arbors, one per size, covering six metric threads from M3 to M10 and seven inch sizes. Reviewers appreciate that a single arbor per size means no duplicates to sort. The maker warns that smaller rivet nuts can break the puller head, so it advises starting at low drill torque and raising it gradually to find a safe level. That learning curve on tiny nuts is the main caution. For someone setting many inserts with a drill already on hand, it moves quickly.
Arbors13 (M3 to M10 plus inch)
Nut count290 pieces
Operationdrill adaptor
Notestart low torque on small nuts
Pros
- Compact adaptor speeds repetitive setting
- 290 nuts across metric and inch sizes
- One arbor per size, nothing duplicated
Cons
- Small nuts risk breaking the puller head
- Requires careful torque ramp-up to avoid damage
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This 70-piece kit reaches up to M12, with 7 interchangeable heads covering M3 through M12 and 70 matching nuts. Carbon steel construction aims at repeated use, and reviewers note the ergonomic grip eases handling during panel installs, brackets, and equipment repair. The hex-style head runs with a suitable wrench or compatible drill setup, giving some flexibility in how you drive it. Its metric-only range and smaller nut count mean inch-thread users and high-volume jobs are less well served. Based on specifications it suits mechanics, farmers, and hobbyists who mainly need larger metric inserts for automotive, agricultural, and general metalwork.
Heads7 (M3 to M12)
Nut count70 pieces
Materialcarbon steel
Operationwrench or compatible drill
Pros
- Reaches larger M12 threads
- Hex head runs with wrench or drill
- Ergonomic grip for panel and bracket work
Cons
- Metric only, no inch sizes
- Just 70 nuts limits big projects
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Sunisfa is a mandrel accessory set aimed at inch threads, covering 10-24, 6-32, 8-32, 5/16-18, 1/4-20, and 3/8-16. You connect the hex rivet head with a wrench, then drive screws by hand or with an electric drill, so it adapts to how you prefer to work. Reviewers highlight its fit for joining sheet metal and pipes across automotive, furniture, construction, and railway tasks. Because it centers on inch sizes and functions as mandrel accessories, buyers should confirm compatibility with their existing tool and note metric coverage is absent. A focused add-on for those who mostly set inch-thread inserts.
Sizes10-24, 6-32, 8-32, 5/16-18, 1/4-20, 3/8-16
Typemandrel accessory set
Operationmanual or electric drill
Materialcarbon steel
Pros
- Focused inch-thread size coverage
- Runs by hand or with an electric drill
- Suited to sheet metal and pipe joining
Cons
- Accessory set, needs a compatible tool
- No metric sizes included
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What to look for
How rivet nuts work
A rivet nut sets a threaded insert into a hole from one side, so you get strong machine threads in thin or soft material where a backing nut will not reach. The tool grips the insert on a mandrel, then compresses it so the body flares behind the panel. Once set, you drive bolts straight into it.
Hand tool or drill adapter
Hand tools give tactile feedback and work anywhere without power, which suits occasional jobs and small threads. Drill adapters and rivet guns speed up repetitive setting but demand a capable drill, often 18V to 24V with a torque limiting clutch. If you set many inserts, powered options reduce fatigue, while hand tools stay simpler for light use.
Matching thread sizes
Check whether you need metric, inch, or both before buying. Some kits stay metric only from M3 to M12, others add inch threads like 1/4-20 and 3/8-16. Buy a kit whose mandrels cover the sizes you actually fasten, and keep spare nuts on hand since assortments run out on active projects.
Avoiding broken mandrels
Small rivet nuts strain the puller head most, and several makers warn it can break under too much force. Start with low torque on a drill and raise it gradually, or choose a hand tool with a force arm controller that limits overpressing. Matching the mandrel to the nut and not overtightening protects both the tool and the threads.
Frequently asked questions
What is a rivet nut tool used for?
It installs threaded inserts into thin or soft materials where you cannot reach the back side with a normal nut. Once set, the insert gives you durable machine threads for bolts in panels, tubes, and sheet metal.
Do I need a drill to use one?
Not always. Hand tools set inserts with a squeeze of the handles, while drill adapters use an electric drill for faster, repeated work. Some kits, like the VLOXO, run either from a drill or manually with a ratchet wrench.
Why do mandrels break?
Breakage usually happens on smaller nuts when too much force is applied at once. Starting at low torque and increasing gradually helps, and tools with a force arm controller limit overpressing to protect the mandrel and threads.
What thread sizes should I look for?
Match the kit to the fasteners you use. Metric ranges like M3 to M12 cover many jobs, while inch sizes such as 1/4-20 and 3/8-16 matter for others. Kits covering both, like the GIANTISAN, offer the most flexibility.
Can these set steel and stainless inserts?
Some can. The VLOXO handles aluminum, steel, and stainless rivets, though it advises against using 5 to 6mm nuts with steel or stainless. Check each tool's guidance, since not every kit is rated for harder materials.
How many nuts come in a kit?
Counts vary widely here, from 70 pieces in the 7-head carbon steel kit to 430 in the ASKWAY set. Reviewers suggest keeping spares, because assortments deplete quickly on active projects.
Are the mandrels easy to change?
Several kits use toolless, fast-change mandrels that swap in seconds without loose parts. The HARDELL adds color coding so you can identify the right size at a glance instead of reading tiny numbers.
What materials are these tools made from?
Most use carbon steel, often heat treated, sometimes paired with high strength aluminum alloy for the body. That construction aims at durability under repeated setting, though care with torque still matters for longevity.
The verdict
GIANTISAN 16" Rivet Nut Tool Kit with 15 M...
9.1/10
For most people, the GIANTISAN kit is the top pick thanks to its wide metric and inch mandrel range, toolless changes, and generous nut supply. Beginners worried about snapping mandrels should look at the HARDELL with its force arm control. If you already own a strong drill and set many inserts, the VLOXO or WelderElite adapters move fastest, while the ASKWAY suits occasional metric jobs needing plenty of spare nuts.
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