Best Plastic Threaded Inserts in 2026
Daisy
Last Updated: Feb 7, 2026
Daisy
Last Updated: Feb 7, 2026
* PickSmartly editors independently research, review, and endorse the top products through comprehensive data analysis. We may earn a commission for qualifying purchases made through our product links.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Up2U | 9.92 | ✅ | ✅ | ✅ |
1/4-20 threaded insert x 15mm length, 6mm allen wrench included, best 1/4"-20 threaded insert wood insert furniture screw in nut connector screws.
Insert head ⌀: 0.461" / 11.7mm, body ⌀: 0.315" / 8mm, threads ⌀: 0.410" / 10.4mm.
Threaded inserts are easy to install, simply drill the right size hole and Install with hex key provided.
In Softer wood, the outside threads cut easily into the wood, simply drill a Appropriately Sized Hole (8.5mm, 9mm, 9.5mm, 3/8" drill bit) for the body of the insert, then screw insert into the place.
In very Harder wood such as white oak or maple, drill a hole size (3/8", 9.5mm, 10mm drill bit) that close to the outside threads diameter, then screw insert into the place. If the drilled hole is too small for the threads, screwing it in MAY split the wood or insert.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Hilitchi | 9.88 | ✅ | ✅ | ✅ |
✅【Well MADE AND QUALITY】These female thread brass knurled threaded insert embedment nuts are made of durable brass. High strength without deformation, abrasion and corrosion resistance and with beautiful and practical
✅【EXCELLENT WORKMANSHIP】Smooth surface with no burr, standard circular, firm and uniform, easy to install. We meet all your needs. Assortment kit or one specific size, we have it all.
✅【STRANDARD AND COMPLETE THREAD】Deep thread, neat and clean, not easy to strip during rotation, stable and reliable. Convenient operation, good texture, greatly improve your work efficiency
✅【A MUST HAVE】These heatset inserts can be widely used on the injection moulding for tightly fixing. Can be installed by ultrasonic or heat into thread tapered hole, or molded in during injection. Also apply to circuit board assembly and in the field of electronics. The plastic is formed around the brass insert. It would be better to put something in the threads to keep plastic from melting into the center. Using a normal soldering iron, you could easily set them into 3D printed holes.
✅【QUALITY AFTER-SALE SERVICE】If you do not satisfy with our products or if you have any questions, please feel free to contact us. We would work out a satisfactory solution to your problem. FREE REPLACEMENT or REFUND within 90days. 12 hours response service!
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Reegoo US | 5.71 | ✅ | ✅ | ✅ |
This kit contains 40-Piece of 1/4-20 Threaded Inserts - 3/5" Length, 20 Piece of 1/4-20 tee nuts - 2/5" length, 30-Piece of 1/4-20 Bolts - 1" length, 10-Piece of 1/4-20 Bolts 1-1/4" length, 40-Piece of 1/4-20 washers.
1/4-20 threaded inserts and t nuts are made of Carbon Steel ,zinc plated. 1/4-20 bolts and washers are made of stainless steel, they feature corrosion-resistance and rust-resistance.
Drilling Size for threaded inserts: ~soft wood - 23/64", if small, use 3/8", ~ hard wood - 3/8", if small, use 25/64".
T nuts are great for furniture making and many wood project while leaving a flush surface, Barrel Height: 5/16″/ 7.9mm, Flange Diameter: 11/16″/ 17.5mm, Barrel diameter: 5/16″/ 7.9mm, Overall Height: 3/8″/ 9.5mm.
Wood threaded insert kit with screws, washers and t-nuts is ideal for wood furniture repair projects.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Up2U | 9.92 | ✅ | ✅ | ✅ |
1/4-20 threaded inserts for woodworking applications, 15mm length, hex drive Allen key included.
Threaded inserts are easy to install, simply drill the appropriately sized hole and Install the inserts with the hex key provided or other optional drive tools you have.
1/4-20 threaded inserts are the ideal solution for softwood, hardwood, plywood, MDF, and composition board.
Threaded inserts head diameter: 0.461" / 11.7mm, body diameter: 0.315" / 8mm, threads diameter: 0.410" / 10.4mm.
In Softwood, recommended drill bits for these threaded inserts are 8.5mm, 9mm, 9.5mm / 3/8". In hardwood such as white oak or maple, recommended drill bits are 9.5mm, 3/8 inch, or 10mm.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
THREADED INSERTS FOR WOOD – E-Z LOK Thread Inserts for hard-wood are ideal for applications where stripping or thread erosion is possible. Perfect for furniture, cabinets, displays, and more.
PROPRIETARY KNIFE THREAD – E-Z Knife thread inserts provide superior holding power using a proprietary external “knife” thread to slice into the wood.
BRASS OR STEEL OPTIONS – Brass threaded inserts or stainless steel threaded inserts available. Stainless steel is recommended for particularly hard wood and anywhere corrosion resistance is needed.
FOR USE WITH APPLICATIONS – The E-Z Knife threaded inserts for wood are designed for use in hard woods such as oak, cherry, and maple.
STRONG THREADS MADE EASY – Easily installs with a screwdriver, bolt/jam nut, or an optional E-Z LOK drive tool.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Hilitchi | 9.88 | ✅ | ✅ | ✅ |
♛ High Quality Knurl Thread Inserts Nuts Assortment Kit
♛ Mateiral: Brass; Size include: M2 / M3 / M4
♛ Package Quantity: 250pcs - Packed in A Rugged Convenient Re-sealable Plastic Storage Case
♛ Made of Bass Material, Featured With Heat Resistance
♛ These Knurl Thread Insert Nut Can Be Widely Used On the Injection Moulding for Tightly Fixing
Here is the list of top-rated brands that were evaluated by PM.
| Brand | Count |
|---|---|
| Hilitchi | 2 |
| Sprite Science | 2 |
| E-Z Lok | 1 |
| Reegoo | 1 |
We've carried out a comprehensive analysis of 2,860 reviews on threaded inserts, using our selection criteria to identify the best options in the fasteners. Our findings reveal that most customers typically select threaded inserts priced around $16.58, with top brands including sprite science, hilitchi and e-z lok and reegoo
Our team of expert editors reviewed these high-quality items and handpicked the top 6 threaded inserts for your consideration. We've also done extensive research on numerous sellers, identifying the best ones in the fasteners category. These include up2u, hilitchi and amazon.com and reegoo us .
We are dedicated to assisting our users in finding the right inserts Products based on their needs, saving them considerable time when choosing which threaded inserts to buy. We take pride in the number of satisfied users we've helped through our thorough and insightful reviews.
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