Jack Nut Sizing Chart
Jack Nut Sizing Chart
☑️ Real threads in thin metal, drywall, or wood
☑️ Installs from the front, no back access
☑️ 30 nuts, 3 sizes, screws included
⚠️ Low on stock - last batch of this run
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Jack Nut Sizing Chart
I was mounting a cargo rack to the inside wall of my trailer and had no way to get behind the panel. These solved it in about ten minutes. Drilled, dropped them in, tightened the screw and they locked down solid. Rack hasn't budged in four months of towing.
I've stripped out more sheet metal screws than I care to admit. Used these to remount a fender liner and the difference is night and day. You get a real machine thread instead of a screw chewing into thin metal. Wish I'd known about these years ago.
Bought them for a van build and ended up using them on the shop cabinets too. Having all three sizes in one kit meant I never had to stop and order the right one. The sizing chart that came with it took the guesswork out of drilling.
What's Included
What's Included
🔩 GripNut Rivet Locking Nut Kit – 30 petal rivet nuts in M4, M5, and M6, with matching screws for every size. Carbon steel with a zinc plating that holds up outdoors and in humid shops. Drill one hole, drop it in, tighten the screw, and the petals fold out behind the panel to lock down a permanent machine thread. No rivet gun, no welding, and no access to the back side.
🪛 FREE Step Drill Bit – The one tool most people don't already own, and the reason jack nuts fail when they do. A step bit cuts a clean round hole in thin metal instead of grabbing and tearing it like a twist bit does. Sized for all three nuts in the kit, so you're ready to install the moment the box lands.
📋 FREE Jack Nut Sizing Chart – A single-page reference that tells you the exact drill size, length, and material thickness for M4, M5, and M6. No guessing, no measuring twice, no spinning nuts from a hole that came out a millimeter too wide. Print it and tape it inside the toolbox lid.
🔁 FREE Lifetime Replacements – If a nut ever fails, we send a new one. No receipt hunting, no return shipping, no arguing. We can stand behind these because we've tested them, and you shouldn't have to gamble on a fastener holding what you mounted to it.
Shipping
Shipping
We offer free shipping on all orders. Processing takes 1–2 business days, and you'll receive tracking once your package ships.
Estimated delivery times:
- USA: 5–8 business days
- UK: 7–11 business days
- Australia & Canada: 8–12 business days
- Europe: 8–12 business days
- Rest of world: 13–18 business days
Product Details
Product Details
Each kit contains 30 jack nuts split across three sizes, with a matching screw for every nut. You get M4 × 20mm, M5 × 25mm, and M6 × 25mm, so the common thin-panel jobs are covered without ordering a second kit halfway through the project.
The body sits at 16mm on the M4 and 18mm on the M5 and M6, which is the length that folds and clamps behind the panel. Every nut is carbon steel with a zinc-plated finish, rustproof and corrosion-resistant enough for outdoor mounts, trailer walls, and humid garages.
They work in sheet metal, drywall, plywood, and plastic, anywhere the material is too thin to hold a thread on its own. The petal design expands as you tighten, so one size covers a range of panel thicknesses instead of forcing an exact match.
Free Shipping Included ✅
Used by thousands of garages and DIYers 🔧
Works in sheet metal, drywall, and plywood 🛠️
Free Shipping Included ✅
Used by thousands of garages and DIYers 🔧
Works in sheet metal, drywall, and plywood 🛠️
Free Shipping Included ✅
Used by thousands of garages and DIYers 🔧
Works in sheet metal, drywall, and plywood 🛠️
Free Shipping Included ✅
Used by thousands of garages and DIYers 🔧
Works in sheet metal, drywall, and plywood 🛠️
Free Shipping Included ✅
Used by thousands of garages and DIYers 🔧
Works in sheet metal, drywall, and plywood 🛠️
Free Shipping Included ✅
Used by thousands of garages and DIYers 🔧
Works in sheet metal, drywall, and plywood 🛠️
Free Shipping Included ✅
Used by thousands of garages and DIYers 🔧
Works in sheet metal, drywall, and plywood 🛠️
Free Shipping Included ✅
Used by thousands of garages and DIYers 🔧
Works in sheet metal, drywall, and plywood 🛠️
Free Shipping Included ✅
Used by thousands of garages and DIYers 🔧
Works in sheet metal, drywall, and plywood 🛠️
Free Shipping Included ✅
Used by thousands of garages and DIYers 🔧
Works in sheet metal, drywall, and plywood 🛠️
Free Shipping Included ✅
Used by thousands of garages and DIYers 🔧
Works in sheet metal, drywall, and plywood 🛠️
Free Shipping Included ✅
Used by thousands of garages and DIYers 🔧
Works in sheet metal, drywall, and plywood 🛠️
Every Thin Panel Job Made Simple
30 or 90 jack nuts in M4, M5, and M6 with screws included. Drill, drop in, tighten. The petals fold out behind the panel and you've got a permanent machine thread in sheet metal, drywall, plywood, or plastic.
Carbon steel, zinc plated so it holds up in the shop, the bay, or outside. All three sizes on hand means you <u>finish the job the first time</u>.
🔩 no rivet gun, just a drill and a screwdriver.
DIYers are calling it the "fastener that should've existed"
Over 40,000 installed by builders and mechanics
96%
Said it held tighter than any sheet metal screw
94%
Never had to reach behind the panel
90%
Said all three sizes saved them a hardware store trip
Based on feedback from our first 500 customers
Includes a Sizing Chart So You Drill It Right the First Time
M4, M5, and M6 with matching screws, plus the chart most kits leave out. Exact drill bit, grip range, and material thickness for every size.
Drill once, hold tight. No guessing, no ruined panels.
How We Compare to Regular Screws
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Regular Screws | |
|---|---|---|
Real machine thread that won't strip |
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No special tool to buy |
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Grips from behind the panel |
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Holds without pulling out |
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3 sizes and screws in one kit |
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No experience needed |
Hold Tight Guarantee
If a single nut fails to grip, we'll replace the whole set free. 90 days, no return needed. Just send a photo.
FAQ's
How do jack nuts actually work?
How do jack nuts actually work?
You drill one hole, drop the nut in, and tighten the screw.
As the screw pulls, the petal body folds outward and clamps behind the panel. That leaves you with a real machine thread in material that was never thick enough to hold one.
Bolt into it, take the bolt out, bolt into it again. Sheet metal screws can't do that.
The whole install happens from the front, so it works in trailer walls, body panels, and ducting where you can't reach behind.
No welding, no rivet gun, no backing plate. Just a drill and a screwdriver.
Do free gifts come with every order?
Do free gifts come with every order?
Yes. Every GripNut kit ships with three free extras:
- Step Drill Bit – $8.99 value, free
- Jack Nut Sizing Chart – $4.99 value, free
- Lifetime Replacements – $14.99 value, free
The bit cuts the hole. The chart tells you which size to use. The guarantee covers you if one ever fails.
Do I need to be experienced to install these?
Do I need to be experienced to install these?
No. If you can use a drill and a screwdriver, you can install these.
There's no special tool to buy and no technique to learn. Drill, insert, tighten. Most people get the first one in under two minutes.
Pros use them for the same reason beginners do: it's the fastest way to put a thread in thin material.
What materials can I use them in?
What materials can I use them in?
Sheet metal, drywall, plywood, plastic, fiberglass, and thin panel of most kinds. Anything too thin to hold a threaded fastener on its own.
How thick can the material be?
How thick can the material be?
Each size has its own grip range. The included sizing chart lists the drill bit and material thickness for M4, M5, and M6 so you don't have to guess.
Will they rust?
Will they rust?
No. Carbon steel with zinc plating. They hold up in humid shops, engine bays, and outdoor mounts. For saltwater or constant submersion, use stainless.
How much weight will they hold?
How much weight will they hold?
More than a sheet metal screw in the same panel, because the load spreads across the folded petals instead of a few threads biting into thin material. Pull-out strength depends on your panel thickness.
Can I remove them?
Can I remove them?
The screw backs out and can be reused as many times as you want. The nut body itself is permanent once the petals are set.
Which set should I get?
Which set should I get?
The 30-piece if you have one job in mind. The 90-piece or even more i'd do if you're doing a van build, a trailer, or shop cabinets, where you'll burn through one size fast.
Which countries do you ship to?
Which countries do you ship to?
We ship GripNut worldwide. If your country shows up at checkout, we can get it to your door.
Estimated delivery times:
- USA: 5–8 business days
- UK: 7–11 business days
- Australia & Canada: 8–12 business days
- Europe: 8–12 business days
- Rest of world: 13–18 business days