Best Plastic Threaded Inserts in 2026
Daisy
Last Updated: Feb 8, 2026
Daisy
Last Updated: Feb 8, 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 |
|---|---|---|---|---|
| Vinient | 9.88 | ✅ | ✅ | ✅ |
40pieces Pack of Furniture Screws Threaded Inserts for Wood Furniture.
Size: Internal Thread Insert Type: 1/4"-20, External Diameter: 10.5mm, Total Length: 15mm. (1/4"-20x15mm)
Material: High quality carbon steel with high hardness. These furniture screws are wear-resistant and very durable to use. Standard internal hex socket type without burr and non-slip design.
Usage: Pre-drill /drill a well-sized hole (Suggest that the diameter of the hole is 9.6 +/- 0.2mm, the length is about 18mm), then use a 6mm internal hex tool to screw in (6mm Hex Spanner Included). Tip: If the furniture wood is with high-hardness, please enlarge the screw hole.
Applications:These furniture screws are suitable for furniture hardwood/ solid wood, for furniture combinations.
| 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 |
|---|---|---|---|---|
| Lesley Francis | 9.83 | ✅ | ✅ | ✅ |
Size: Insert head diameter: 0.445" (11.3mm), body diameter: 0.315"(8mm), threads diameter: 0.410"(10.4mm),1/4-20 threaded insert length: 0.591"(15mm); Allen Wrench: 1/4"(6mm).
Material: High quality carbon steel with high hardness, can keep a long-lasting hold.
Application: These furniture screws are suitable for wood furniture, hardwood or solid wood, such as furniture combinations(Threaded inserts are used to drill the right size hole and Install with hex key provided, and screw in nut connector screws).
Recommended drill bit for wood: For Soft Wood-- 3/8" (8.5mm/9mm)dirll bit in soft wood, the threads cut will easily go into the wood; For Hard Wood-- 3/8" (10mm),pls drill a hole that close to the outside threads diameter.If the hole is too small, Screwing it may split the wood or insert. If you are not sure the harness of the wood material, pls drill a proper sized hole for test before installing it.
Package included: 40 *1/4-20 Threaded Insert Nutsert + 1*1/4"(6mm) Allen Wrench.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
QUICKLY REPAIR DAMAGED THREADS – Quickly repair damaged threads or reinforce tapped holes in metals with this thread repair tool kit.
THIN WALL CARBON STEEL INSERTS – Kit includes thin wall carbon steel threaded inserts that are ideal for applications where the hole size is an issue.
FOR USE WITH APPLICATIONS – The metal threaded inserts are designed for use with soft metals: aluminum, cast iron, magnesium, etc.
KIT INCLUDES – Convenient kit includes threaded inserts for metal, drill, tap, and threaded insert installation drive tool.
Made In America Thread Repair Inserts
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| HELIFOUNER | 9.89 | ✅ | ✅ | ✅ |
【Detailed Dimensions】1/4"-20 x 10mm/15mm/20mm/25mm, 4 sizes commonly used threaded inserts in a plastic case, different sizes can satisfy your different needs. Internal thread insert type: 1/4"-20, thread type: 20 threads per inch, coarse thread, fit standard 1/4 20 screws bolts perfectly.
【Color Zinc Plated Steel】Made of high quality carbon steel, color zinc plated on the surface which have good corrosion resistance in bad environment like high temperature, high hardness and perfect wear resistance, standard internal hex socket, without burr, smooth, non-slip, which can ensure long time using.
【Easy To Install】You can drill a hole by using a 3/8" drill bit, ensure a precise 90 degree angle for inserting the threaded inserts, then you need to screw the inserts into the 3/8" holes by using our hex wrench. Make sure you countersink the hole to head size before you insert the threaded sleeve, fit standard 1/4 20 screws bolts perfectly.
【Threaded Inserts Assortment Kit】Total 140 pieces 4 sizes 1/4-20 threaded inserts are packed in a durable transparent box with label for you. It is easy to distinguish the size of the product, you can choose the suitable one to use in your wood furniture. Our threaded inserts have standard internal hex socket, without burr, smooth, non-slip.
【Wide Applications】You can use our threaded inserts to repair file cabinets and chair leg, you can also use them on head board and foot board of wood furniture. Widely used for soft woods of pine, plywood, fiberboard, etc, work perfectly on the furniture combination, you just need to drill a hole that the size of the body into the wood for the threaded inserts.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| KURUI-Direct | 9.74 | ✅ | ✅ | ✅ |
Rich Size Options - This Threaded Inserts Assortment Kit is available in a wide range of sizes, including 1/4-20*10mm, 1/4-20*15mm, 1/4-20*20mm, and 1/4-20*25mm. All sizes are neatly organized in a clear organizer box, allowing you to quickly locate the one you need.
Superior Quality for Outstanding performance - This Nut Inserts Assortment Set is constructed entirely of new, high-grade carbon steel with exceptional hardness and many layers of zinc coating for enhanced rust resistance, providing a longer service life and a more dependable installation.
Clearly assorted for easy access - The Threaded Inserts Assortment set comes in a well-built transparent storage box, which allows you to place all sizes of Threaded Inserts in a well organized war and so that you can get what you need at a glance, saving you a lot of time rummaging through drawers finding a match for your project.
Wide range of applications - You'll be able to get your hands on furniture, cribs, tables, chairs, wood dry, and other tasks with the assistance of the Threaded Inserts Assortment kit, which comes in several sizes. Because of its dependable quality and long-lasting nature, you can use it without worrying about breaking it.
What you get - You will receive 10 pieces of 1/4-20*10mm, 30 pieces of 1/4-20*15mm, 30 pieces of 1/4-20*20mm, 5 pieces of 1/4-20*25mm threaded inserts, an allen wrench, and a lovely clear sorting storage box. If you have any questions about this collection of threaded inserts, please feel free to contact us. We are happy to help.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
THREADED INSERTS FOR METAL – E-Z LOK Thread Inserts for metal. Solid threaded inserts that are strong, easy to install, and self-locking. For optimal holding power in metal.
INSTALL WITH STANDARD TOOLS – 12L14 Carbon steel threaded inserts. Install with standard tools. No special drills, taps, or special installation tools are needed.
QUICKLY REPAIR DAMAGED THREADS – Quickly repair damaged threads or reinforce tapped holes in soft metals with these steel thread inserts.
FOR USE WITH APPLICATIONS – The threaded inserts are designed for use with soft metals: aluminum, cast iron, magnesium, etc.
STRONG THREADS MADE EASY – Simply drill the hole with a standard drill. Tap the hole with a standard tap. Turn in the insert with a screwdriver, bolt/jam nut, or an E-Z LOK drive tool.
IMPORTANT NOTE: Installation requires the use of a Letter X drill.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| IndustrialSupplies | 9.47 | ❌ | ❌ | ❌ |
THREADED INSERTS FOR METAL – E-Z LOK Thread Inserts for metal. Solid threaded inserts that are strong, easy to install, and self-locking. For optimal holding power in metal.
INSTALL WITH STANDARD TOOLS – 12L14 Carbon steel threaded inserts. Install with standard tools. No special drills, taps, or special installation tools are needed.
QUICKLY REPAIR DAMAGED THREADS – Quickly repair damaged threads or reinforce tapped holes in soft metals with these steel thread inserts.
FOR USE WITH APPLICATIONS – The threaded inserts are designed for use with soft metals: aluminum, cast iron, magnesium, etc.
STRONG THREADS MADE EASY – Simply drill the hole with a standard drill. Tap the hole with a standard tap. Turn in the insert with a screwdriver, bolt/jam nut, or an E-Z LOK drive tool.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
THREADED INSERTS FOR METAL – E-Z LOK Thread Inserts for metal. Solid threaded inserts that are strong, easy to install, and self-locking. For optimal holding power in metal.
INSTALL WITH STANDARD TOOLS – 12L14 Carbon steel threaded inserts. Install with standard tools. No special drills, taps, or special installation tools are needed.
QUICKLY REPAIR DAMAGED THREADS – Quickly repair damaged threads or reinforce tapped holes in soft metals with these steel thread inserts.
FOR USE WITH APPLICATIONS – The threaded inserts are designed for use with soft metals: aluminum, cast iron, magnesium, etc.
STRONG THREADS MADE EASY – Simply drill the hole with a standard drill. Tap the hole with a standard tap. Turn in the insert with a screwdriver, bolt/jam nut, or an E-Z LOK drive tool.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Small Town Premium Supplements | 9.82 | ✅ | ✅ | ✅ |
THREADED INSERTS FOR METAL – E-Z LOK Thread Inserts for metal. Solid threaded inserts that are strong, easy to install, and self-locking. For optimal holding power in metal.
INSTALL WITH STANDARD TOOLS – 12L14 Carbon steel threaded inserts. Install with standard tools. No special drills, taps, or special installation tools are needed.
QUICKLY REPAIR DAMAGED THREADS – Quickly repair damaged threads or reinforce tapped holes in soft metals with these steel thread inserts.
FOR USE WITH APPLICATIONS – The threaded inserts are designed for use with soft metals: aluminum, cast iron, magnesium, etc.
STRONG THREADS MADE EASY – Simply drill the hole with a standard drill. Tap the hole with a standard tap. Turn in the insert with a screwdriver, bolt/jam nut, or an E-Z LOK drive tool.
IMPORTANT NOTE: Installation requires the use of a 37/64 drill.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| IndustrialSupplies | 9.47 | ❌ | ❌ | ❌ |
THREADED INSERTS FOR METAL – E-Z LOK Thread Inserts for metal. Solid threaded inserts that are strong, easy to install, and self-locking. For optimal holding power in metal.
INSTALL WITH STANDARD TOOLS – C12L14 Carbon steel threaded inserts. Install with standard tools. No special drills, taps, or special installation tools are needed.
QUICKLY REPAIR DAMAGED THREADS – Quickly repair damaged threads or reinforce tapped holes in soft metals with these steel thread inserts.
FOR USE WITH APPLICATIONS – The threaded inserts are designed for use with soft metals: aluminum, cast iron, magnesium, etc.
STRONG THREADS MADE EASY – Simply drill the hole with a standard drill. Tap the hole with a standard tap. Turn in the insert with a screwdriver, bolt/jam nut, or an E-Z LOK drive tool.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
THREADED INSERTS FOR METAL – E-Z LOK Thread Inserts for metal. Solid threaded inserts that are strong, easy to install, and self-locking. For optimal holding power in metal.
INSTALL WITH STANDARD TOOLS – 12L14 Carbon steel threaded inserts. Install with standard tools. No special drills, taps, or special installation tools are needed.
QUICKLY REPAIR DAMAGED THREADS – Quickly repair damaged threads or reinforce tapped holes in soft metals with these steel thread inserts.
FOR USE WITH APPLICATIONS – The threaded inserts are designed for use with soft metals: aluminum, cast iron, magnesium, etc.
STRONG THREADS MADE EASY – Simply drill the hole with a standard drill. Tap the hole with a standard tap. Turn in the insert with a screwdriver, bolt/jam nut, or an E-Z LOK drive tool.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
THREADED INSERTS FOR METAL – E-Z LOK Thread Inserts for metal. Solid threaded inserts that are strong, easy to install, and self-locking. For optimal holding power in metal.
INSTALL WITH STANDARD TOOLS – 12L14 Carbon steel threaded inserts. Install with standard tools. No special drills, taps, or special installation tools are needed.
QUICKLY REPAIR DAMAGED THREADS – Quickly repair damaged threads or reinforce tapped holes in soft metals with these steel thread inserts.
FOR USE WITH APPLICATIONS – The threaded inserts are designed for use with soft metals: aluminum, cast iron, magnesium, etc.
STRONG THREADS MADE EASY – Simply drill the hole with a standard drill. Tap the hole with a standard tap. Turn in the insert with a screwdriver, bolt/jam nut, or an E-Z LOK drive tool.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Moofin | 9.87 | ✅ | ✅ | ✅ |
Easy to Use Solution For Repairing Damaged Threads in Metal
Install With Standard Drill & Tap; NO Special Tools Needed
Self Locking; Preapplied Adhesive Activates Upon Installation and is Fastener-Ready in 3-5 Minutes
Ideal For Soft Metals Like Aluminum, Cast Iron, or Magnesium
Made in America - Strong, Solid Construction Design
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
THREADED INSERTS FOR METAL – E-Z LOK Thread Inserts for metal. Solid threaded inserts that are strong, easy to install, and self-locking. For optimal holding power in metal.
INSTALL WITH STANDARD TOOLS – 12L14 Carbon steel threaded inserts. Install with standard tools. No special drills, taps, or special installation tools are needed.
QUICKLY REPAIR DAMAGED THREADS – Quickly repair damaged threads or reinforce tapped holes in soft metals with these steel thread inserts.
FOR USE WITH APPLICATIONS – The threaded inserts are designed for use with soft metals: aluminum, cast iron, magnesium, etc.
STRONG THREADS MADE EASY – Simply drill the hole with a standard drill. Tap the hole with a standard tap. Turn in the insert with a screwdriver, bolt/jam nut, or an E-Z LOK drive tool.
IMPORTANT NOTE: Installation requires the use of a Letter I drill.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
THREADED INSERTS FOR METAL – E-Z LOK Thread Inserts for metal. Solid threaded inserts that are strong, easy to install, and self-locking. For optimal holding power in metal.
INSTALL WITH STANDARD TOOLS – 12L14 Carbon steel threaded inserts. Install with standard tools. No special drills, taps, or special installation tools are needed.
QUICKLY REPAIR DAMAGED THREADS – Quickly repair damaged threads or reinforce tapped holes in soft metals with these steel thread inserts.
FOR USE WITH APPLICATIONS – The threaded inserts are designed for use with soft metals: aluminum, cast iron, magnesium, etc.
STRONG THREADS MADE EASY – Simply drill the hole with a standard drill. Tap the hole with a standard tap. Turn in the insert with a screwdriver, bolt/jam nut, or an E-Z LOK drive tool.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| ❌ | ❌ | ❌ |
THREADED INSERTS FOR METAL – E-Z LOK Thread Inserts for metal. Solid threaded inserts that are strong, easy to install, and self-locking. For optimal holding power in metal.
INSTALL WITH STANDARD TOOLS – 12L14 Carbon steel threaded inserts. Install with standard tools. No special drills, taps, or special installation tools are needed.
QUICKLY REPAIR DAMAGED THREADS – Quickly repair damaged threads or reinforce tapped holes in soft metals with these steel thread inserts.
FOR USE WITH APPLICATIONS – The threaded inserts are designed for use with soft metals: aluminum, cast iron, magnesium, etc.
STRONG THREADS MADE EASY – Simply drill the hole with a standard drill. Tap the hole with a standard tap. Turn in the insert with a screwdriver, bolt/jam nut, or an E-Z LOK drive tool.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amadeo City | 9.87 | ✅ | ✅ | ✅ |
Product Name: Threaded Inserts; Finish: Nickel Plated; Color: Silver Tone; Inner Thread Size: M6 x 1((Dia.x Pitch); Outer Thread Size: M10 x 1.5(Dia.x Pitch); Length: 14mm / 0.55"
Min. Drilling Size: 3 x 5.5mm / 0.12"x0.22"(wide*depth); Reference Drilling Diameter: 12.6-12.8mm(Plastic), 13-13.3mm(Aluminum Alloy), 13.2-13.4mm(Cast Iron)
Material: Carbon steel material, suitable for aluminum alloy, copper alloy, plastic and other substrates with low engineering strength. Strong resistance to vibration, can prevent loosening.
Advantages: With self-tapping capability, the base material does not need to be tapped in advance. It has a repairing effect on the female thread of the broken tooth, can continue to use the same screws by using the self-tapping screw sleeve.
Application: Installation easily, and only one assembly tool is required. It is widely used in household appliances, the shipping industry, construction machinery, electronic products, modular furniture and other places.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amadeo City | 9.87 | ✅ | ✅ | ✅ |
Product Name: Threaded Inserts; Finish: Zinc Plating; Color: Gold Tone; Inner Thread Size: M3 x 0.5((Dia.x Pitch); Outer Thread Size: M5 x 0.5(Dia.x Pitch); Length: 6mm / 0.24"
Min. Drilling Size: 1 x 2.5mm / 0.04"x0.1"(wide*depth); Reference Drilling Diameter: 4.5-4.6mm(Plastic), 4.6-4.7mm(Aluminum Alloy), 4.7-4.8mm(Cast Iron)
Material: 45# Carbon steel material, suitable for aluminum alloy, copper alloy, plastic and other substrates with low engineering strength. Strong resistance to vibration, can prevent loosening.
Advantages: With self-tapping capability, the base material does not need to be tapped in advance. It has a repairing effect on the female thread of the broken tooth, can continue to use the same screws by using the self-tapping screw sleeve.
Application: Installation easily, and only one assembly tool is required. It is widely used in household appliances, the shipping industry, construction machinery, electronic products, modular furniture and other places.
Here is the list of top-rated brands that were evaluated by PM.
| Brand | Count |
|---|---|
| E-Z Lok | 12 |
| Uxcell | 2 |
| Anwenk | 1 |
| Helifouner | 1 |
| Kurui | 1 |
| Oiiki | 1 |
| Reegoo | 1 |
We've carried out a comprehensive analysis of 3,656 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 $17.31, 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 19 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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