Best Nut Inserts of 2026

"I've used these on my epoxy wood tables and I'm truly impressed by how easy they are to install and how solid they hold. They're definitely a great option if you want a reliable and quality mounting solution. I would highly recommend them!"

"After comparing these to the expensive ones at my local hardware store, I was thrilled with the huge value and quantity in this kit. The hex drive made installation so much easier than flathead versions, and with a bit of epoxy, the inserts are tight and long-lasting. I got way more than I needed, which means I can plan even more projects."

"I build custom furniture and these inserts have been a game-changer. With the included Allen wrench and drill bit, installation couldn't be simpler. The connection is very strong, and the end result looks clean and professional even if the hardware isn't visible. My customers love how easy assembly is, and I appreciate the lower shipping costs from compact packaging."

"I appreciate how sturdy and reliable these inserts are, and the variety of size and material options available. The unique external threads grip securely, and I always add a touch of epoxy for extra hold. They’re perfect for building jigs or furniture that needs to be taken apart occasionally."

"When working on my live edge bar project, I found that these inserts are top-notch quality and make assembly and disassembly much easier. After trying a few installation techniques, I realized that using a drill press or drill guide ensures straight, clean installation, even in dense hardwood. The finished result looks professional, and everything stays secure."

"I used these for my wood doors and was impressed by the neat, sturdy installation. The bolts are now secure and won’t pull out, unlike regular screws. The finished look is clean, and the inserts hold up great, making them my go-to for similar projects."

"I’m impressed by the variety of sizes and the overall quality of these inserts. They’re simple to install using my soldering iron and have been perfect for my prototyping needs. If I could change one thing, I’d prefer a few more M4 sizes in the assortment."

"This kit is awesome for all my 3D printing projects. The different size fittings are a huge plus. I just wish it also came with screws, but for my small projects, it's absolutely perfect."

"Using these threaded inserts has really improved the finish of my 3D printed parts. The assortment is excellent, and everything fits my heat set tools well. All the pieces are well made and functional—I plan to buy them again."

"When I needed to attach a foot to my leg lamp base, these M4 threaded inserts were perfect. They installed easily, the threads were super smooth, and the value per piece was hard to beat. I’ll definitely keep using these for future projects."

"I picked up this kit for my 3D printing projects and was really impressed. The inserts fit perfectly and the brass quality is great. Plus, the little organizer box helps keep everything tidy, so I always know where to find the right size."

"For anyone working with 3D prints, this assortment is a lifesaver. The set includes plenty of sizes, all well-machined and easy to work with, though some of the smallest pieces take a bit of care to handle!"

"I use thousands of these inserts for my products, and they’ve become absolutely essential to my business. After a failed attempt with a cheaper brand, I realized only ruthex delivers consistent quality and flawless threads—no more wasted prints or frustration. This is the only brand I trust now."

"If you’re not using threaded inserts like these for your 3D prints, you’re missing out. The ruthex M3 series installs perfectly every time—no drama, no bulging, just professional results with strong, reliable threads. They hold up to repeated use and make every project feel next-level."

"These inserts are just what I need for all my 3D printed enclosures. They’re easy to install, grip perfectly, and I’ve never had one come loose. I’ve already finished a bag of M3s and am ordering more sizes. Consistent quality I can count on."

"I love the broad range of sizes in this set, and the included tip makes installation a breeze. Using 400 degrees for PETG always gets the job done quickly—very satisfied!"

"I got this kit for my 3D printing projects, and it works flawlessly. The heat set inserts paired with my soldering iron performed even better than expected—truly impressive!"

"This starter pack has good quality inserts and a nice selection. I originally picked it up to fix a curtain rod with nylon ends, and it saved me from buying a new one. Perfect for repairs and 3D prints!"

"I found the threaded inserts to be perfectly machined and easy to use. They heat in smoothly and hold tight in my 3D prints, which really improves assembly and disassembly. The included case keeps everything organized, and the variety of sizes covers all my needs. Excellent kit for anyone wanting durable threads in plastic—I’ll definitely buy again when I run out."

"These inserts arrived fast and worked flawlessly for my 3D printing projects. They fit well with my soldering iron adapter, and I’ve had no issues with thread quality or fit. Plenty of pieces, consistent sizing, and great value—a must-have for anyone making functional printed items."

"I use threaded inserts in most of my 3D prints, and this set is exactly what I was looking for. Multiple sizes and lengths, all well-machined with no burrs. There’s a good amount of each size, and the kit is perfect for restocking or having a variety on hand. If you need reliable inserts for your projects, try these out."

"I've been using these brass knurled inserts for my 3D printing projects, and they have truly been a game-changer. The quality of the brass is excellent, and once heat-set, they hold firmly in place, even when parts are handled frequently. The value for the variety and quantity you get is outstanding—definitely a five-star product in my book."

"This set offers a great mix of insert sizes, all neatly organized in separate compartments. They install easily with a soldering iron and make my builds much more reliable. The packaging is especially convenient, keeping everything tidy and easy to access."

"These heat set inserts are very easy to use, especially with the included tweezers. Just be gentle with steel fasteners, as the brass is a bit soft. Overall, they’re a solid choice for anyone working with 3D prints."

"I'm really happy with this threaded insert set. The build quality is excellent, with sturdy, well-made pieces in various sizes. They were simple to install and created a reliable hold for my woodworking projects. For the price, I think this kit offers outstanding value and versatility."

"After trying smaller sets from local retailers, I needed something bigger and decided on this one. The 3/8” anchors are hard to find locally, but this set had them and they’re well-machined. I appreciated the inclusion of sturdy hex wrenches, not the flimsy kind you usually get. Some anchors were a bit tight due to the coating, but retapping solved it. Overall, the quality and selection impressed me."

"I like that the kit has a good range of sizes and includes hex wrenches. My only minor gripe is with the cracked storage container and lack of a spot for the wrenches. Still, the inserts themselves are reliable and useful for multiple projects."

"I've tried several brands, and this kit stands out for its accurate sizes and the fact that it comes with every adapter I need for my soldering iron. They're incredibly easy to use and have worked perfectly in all my ASA 3D prints. No issues with threads so far, and the value is hard to beat."

"This set is exactly what I needed for my projects. I appreciate the variety of sizes and the fact that it comes with an extension and adapter for each one. They're perfect for both my small woodworking and 3D printing needs."

"After searching for a solution for years, I was thrilled to find these inserts. They're perfect for creating custom jewelry and integrating into my designs. The price and usability really make this kit a winner for me."