Best Nut Inserts 2025

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Last Updated - 26.07.2025

Best Choice

01

Habwea

Habwea 308 Pieces Threaded Insert 3D Printing M2 M2.5 M3 M4 M5 M6 Threaded Inserts Melting Thread Brass Screw-In Nut with Soldering Iron Melting Aid Melting Thread for Plastic Parts

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9.9

Exceptional

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Main highlights

With heat set insert tips: Includes M2 M2.5 M3 M4 M5 M6 M8 soldering iron and M4 x 32 mm soldering iron adapters are tips for the thread inserts. Heat set insert tips inserting soldering tools – it is very easy to change the tip heads, no need to remove the whole tip, simply unscrew the tip head and Set a new set of
Wide application: this heating element is widely used and is suitable for 3D printer accessories, automotive parts, electrical appliance injection moulding, laptop injection moulded plastic shells and other areas. Whether at home, in the office or in industry, this set of nut inserts can meet your various needs, provide stable performance and long service life.
Perfect fit for your 3D printing: ideal basic equipment for 3D crafters, what makes this set special is the fact that it contains a set of matching melting tools. This set of melting tools consists of an adapter, fits very well on small soldering irons, for most 3D printing fans, the workmanship, especially the internal thread, is clean and precise.
High-quality material brass thread insert: the threaded inserts are made of corrosion-resistant brass for durability, and the non-slip external thread can increase friction when screwing in, making installation safer
Available in a range of different sizes: the assortment box includes embedding nuts M2.5, M3, M4, M5, M6 inch size and 8-piece soldering iron for ultrasound/thermal embedding. Sorted by quantity in clear storage boxes for easy access and protection.

15,99 €
02

BUCOMTU

308 Pieces Threaded Inserts for 3D Printing, Brass Insert Nuts M2 M2.5 M3 M4 M5 M6, Melt Thread Set with Melting Aid and Sorting Box, with Plastic Box

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9.8

Exceptional

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Main highlights

Wide application scenarios: suitable for thermoplastic, 3D printed parts, automotive accessories, electronic devices, household appliances, plastic trays for laptops and other fields
Suitable for 3D printing: this kit is an ideal choice for 3D printing and DIY plastic parts processing. It is equipped with special welding tools, making installation convenient and fast, and easily achieve the embedding of nut heat presses to increase the strength of the printed parts
Multi-spec classification memory: a total of 308 threaded inserts that cover several common specifications of M2-M6, transparent classified box packaging, easy to store and use, prevent chaos and loss and make work more efficient and tidy
High-quality brass material: you will receive: 70pcs M2x4x3.2, 70pcs M2.5x6x3.5, 70pcs M3x5.7x4.6, 50pcs M4x8.1x6.3, 20pcs M5x9.5x7, 20pcs M6x10x8, 8pcs cables with high and with high Purses and women, with high fitness, with high cables and are not easy to deform for a long time, which ensures a stable and firm connection effect
Equipped with welding tool kit: includes 8 pieces of welded irons with special welding connections (compatible with M2, M2.5, M3, M4, M5, M6, thread specifications) and are equipped with adapters for quick replacement and efficient adjustment to hot melt

15,69 €
03

LCXCXY

Threaded Insert Set of 300 Insertion Nuts PP Box with Tag M2 M2.5 M3 M4 M5 M6 Brass Threaded Inserts Knurled Melting Thread Suitable for Plastic Parts in Threaded Insert 3D Printing

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9.7

Exceptional

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Wide application: brass thread insert M3 M4 are often used in the electronics industry, in the construction industry and 3D printing thread inserts. By hot melting, hot pressing, ultrasonic welding and injection moulding, knurled threads and plastic parts are firmly together.
Packaging details: thread inserts include M2 x 2.5 x 3.2, M2 x 3 x 3.2, M2 x 4 x 3.2, M2.5 x 4 x 3.5, M2.5 x 5 x 3.5, M3 x 4 x 5, M3 x 5 x 5, M3 x 6 5, 5, 5, 30pcs M4 x 4 x 6, M4 x 6 x 6, M4 x 8 x 6, M5 x 6 x 7, M5 x 10 x 7, each 10 pieces. M6 x 8 x 8, each 10 pieces 1/4-20 x 12.7 x 8, total 300 pieces.
High-quality material: the threaded insert is made of high-quality brass with clear and deep thread, high hardness, corrosion and oxidation resistance as well as good thermal and electrical conductivity, which makes it durable.
Exquisite label: the melting thread kit is equipped with a special label. The label corresponds to the 15 square grid design of the PP plastic box. It features the different models and quantities of threaded inserts, so there are no confusion and it is practical to find and use.
Easy to carry: Our press-in nuts are equipped with a PP plastic box. 7 models and 15 sizes of threaded sleeve are arranged in a neat 15 square grid. The top of the PP plastic box features a hook opening for easy transport and storage.

10,99 €
04

TW1TGOFT

Pack of 300 Threaded Inserts, M2 M2.5 M3 M4 M5 M6 Insert Nut Brass Threaded Bushings Female Thread Knurled Nuts with Plastic Box for Plastic Parts by Heat or Ultrasonic in 3D Printer Parts

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9.6

Exceptional

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Main highlights

Sturdy & Durable: Forged from pure copper, good thermal conductivity, fully automatic manufacturing process, deep thread, even slope, smooth and burr-free surface, acid and alkali resistant, strong oxidation resistance, durable.
EASY ASSEMBLY Insert the threaded nut into the hole and heat the nut with a soldering iron. After heating, the threaded insert is pressed into the part. The screws are then mounted with the cooled nut. The nut can be easily inserted into the plastic part with either the ultrasonic or soldering iron.
Attention: hot pressing process for nut inserts, please preheat the nut before the bottom pressing process. Workers should wear insulated gloves when operating to avoid safety risks during operation.
Application: TW1TGOFT knurled nuts are designed for thermoplastics. The threaded insert nuts are threaded connections for injection moulding, circuit board assembly, electronic products and most plastic fasteners, e.g. PLA, PP, ABS, PPS, PETG.
7 models and 15 sizes: (dimensions in mm) M2 x 2.5 x 3.2, M2 x 3 x 3.2, M2 x 4 x 3.2, M2.5 x 4 x 3.5, M2.5 x 5 x 3.5, M3 x 4 x 5, M3 x 5. 5 , M3 x 6 x 5, M4 x 4 x 6, M4 x 6 x 6, M4 x 8 x 6, M5 x 6 x 7, M5 x 10 x 7, M6 x 8 x 8, 1/4-20 x 12.7 x 8, total 300 pieces. It is in different compartments it is in a plastic box and is labelled to avoid confusion.

10,99 €
Value for Money

05

Hapric

Pack of 200 Threaded Inserts, M3 Thread Insert, 3D Print, Melting Thread, Insertion Nuts, Threaded Inserts for 3D Printing Parts, Automotive, Plastic Shell

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9.5

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Sufficient quantity: you will receive 200 pieces threaded inserts with specifications M3 x 4 x 5 mm, sufficient quantity to meet your daily use and replacement needs. Please confirm the required nut size before purchasing.
Strong and stable: the threaded insert is made of brass, which has good thermal conductivity and is not easy to deform. The surface is smooth and burr-free and the threads are clear. Diagonal threads ensure a snug fit and increase torque strength.
Multiple use: the press-in nuts are widely used in life and are suitable for 3D printers, digital cameras, computers, plastic car parts, circuit board assembly, electronic products and most plastic fasteners, etc.
Easy to use: simply heat the threaded insert 3D pressure and press into the plastic. It can also be installed with a soldering iron or an ultrasonic device.
Easy to carry: comes with a transparent plastic box. You can put the melting threads into the plastic box, which takes up little space, easy to store and easy to carry.

8,49 €
06

HOLMOL

Threaded Insert 360 Piece Set, HOLMOL Brass Melting Thread M2 M2.5 M3 M4 M5 M6 for Plastic, Knurled Insert Nuts for 3D Printing Accessories and DIY Projects, Thread Inserts with Box

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9.4

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Versatile: threaded inserts are ideal for electronics, 3D printing, laptop shapes and many more DIY applications.
Variety of sizes: including 50 pieces M2x2.5x3.2, 40 pieces M2x3x3.2, 40 pieces M2x4x3.2, 40 pieces M2.5x4x3.5, 40 pieces M2.5x5x3. 5, 30 pieces M3x4x5, 30 pieces M3x5x5, 30 pieces M3x6x5, 10 pieces M4x4x6, 10 pieces M4x6x6, 10 pieces M4x8x6, 10 pieces M5x6x7, 10 pieces M5x10x7, 5 pieces M6x8x8x 8, 5pcs 1/4-20x12.7x8 knurled melting threads for 3D printing.
Precise knurled thread: the knurled thread ensures a strong hold and prevents pulling out, especially when used in 3D printed parts.
HIGHEST QUALITY: Threaded insert is made of brass, which is known for its high corrosion resistance and thermal conductivity.
Easy to use: press-in nuts can be easily inserted into plastic or 3D printed materials by heating.

13,99 €
07

KILDOWS

KILDOWS Pack of 200 Threaded Inserts, M3 Thread Insert, 3D Print Press-in Nuts, Brass Threaded Sockets, M3 x 5 x 4 mm Threaded Inserts, Melting Thread, Knurled Nuts for 3D Printing Parts, Plastic

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9.2

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Wide application: these knurled nuts come in a clear plastic case for easy storage. It is suitable for all thermoplastics and is ideal for use in 3D printers, electronics, laptop molds, plastic car parts, circuit board assembly, electronics and most plastic fasteners.
Value package: you will receive 200 pieces M3 thread inserts, ID 3 mm, diameter 5 mm, height 4 mm, with tweezers for easy access. Sufficient quantity for your daily use and replacement needs. Please check the required nut size before purchasing.
Solid installation: Threaded inserts for 3D printing have a bevelled thread surface that provides a balanced high tightening torque and ensures a stable connection without twisting or peeling. They can also be removed and reused when no longer needed.
High-quality material: our insert nuts are made of high-quality brass with good thermal conductivity, high hardness, not easy to deform, rust and corrosion resistant, oxidation resistant, smooth surface without burrs, clear thread, sturdy and durable for long-term use.
Easy to use: simply heat the threaded insert and press it into the thermoplastic, wait for the plastic part to cool and cure around the brass threaded bushings, and the threaded sleeve is securely attached. Note: when working, insulated gloves should be worn.

8,99 €
08

Qeapug

Qeapug Pack of 230 screw-in nuts, M4/M5/M6/M8/M10 zinc alloy screw-in sleeves, hexagonal nut, drive-in nuts for wooden furniture, threaded inserts

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10% Off
9.1

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Wide applications: the screw-in nut can be installed in many different materials, including steel, plastic, fibreglass, sofas, etc. Mainly used for connecting furniture, wardrobes, sofas, beds, cabinets, wooden doors, chairs and other household items.
What you get: you will receive 230 screw-in nuts of 11 sizes, including M4 x 8 - 30 pieces, M4 x 10 - 60 pieces, M5 x 10 - 45 pieces, M6 x 8 - 18 pieces, M6 x 10 - 32 pieces, m6 x 13 - 13 pieces. 15 - 1 - 2 pieces, m8 x 15 - 10 pieces, m8 x 20 - 5 pieces, m10 x 15 - 3 pieces, m10 x 25 - 2 pieces, enough for your daily use.
Premium material: The impact nuts are made of excellent galvanised carbon steel material with smooth edges and high hardness, which is not easy to deform, corrosion resistance, good fastening effect and can be easily screwed in.
Easy to use: Use insert nuts, pre-drill a correct hole, screw it in with an Allen tool; unique self-tapping external thread that contributes to thread cutting and provides a strong, durable thread for wood and wood materials.
Easy to store: The 230 screw-in sleeves are stored by type in a transparent storage case for quick access and protection. The tapered male thread makes it difficult to pull out due to vibrations.

9,88 € 10,99 €(10% Off off)
09

Walfront

Screw-in Nut Assortment Kit, 20-Piece Threaded Insert Wood Hex Drive Nut Insert Nuts Full Thread Galvanised Carbon Steel M6 / M8 / M10 Wood Insert Nuts (M8 x 25 mm)

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9.0

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

These wooden insert nuts are available in different sizes and different screw sizes that you can choose for your project
These screw-in nuts have an external thread and a hexagon socket and are screwed in with an Allen key
These insert nuts are made of galvanized carbon steel to ensure durability and rust protection
The pre-drilled hole must be as deep as the length of the insert nut plus part of the screw that may be screwed over the end of the nut in the workpiece
Insert nuts are advantageous over cylinder nuts and T-nuts, they can be installed from one side of the workpiece

7,31 €
10

HAOYULUO

Pack of 300 thread inserts, M2, M2.5, M3, M4, M5, M6, 1/4 melting thread, with sorting box, press-in nuts, threaded inserts, for 3D printing accessories and plastic parts by heat or ultrasonic

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8.9

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Warm tips: This threaded insert set with knurled nut has heat press properties. During the pressing process, please preheat the fuse and the operator must wear insulating gloves to avoid safety accidents during the process.
WIDE RANGE OF APPLICATIONS Our female thread kit is designed for use with all thermoplastics. The knurled shape is designed to adhere to materials such as PLA, PETG, ABS, PPS, PP and much more. Threaded inserts can be used in injection molding, circuit board assembly and most plastic fasteners, fully automated manufacturing process
Package includes: you will get a box of 7 models and 15 sizes threaded insert, knurled nut: M2, M2.5, M3, M4, M5, M6, 1/4, total 300 pieces threaded insert, with convenient plastic sorting boxes with matching stickers and labels to avoid confusion, and the quantity is enough to meet your daily needs
High Quality Material Our threaded insert with knurled nut is forged from high quality pure copper, guaranteeing optimal corrosion resistance, acid and alkali resistance, as well as thermal conductivity, strong oxidation resistance and deep to uniform threads, which can be carefully removed. of the printed part when using and reusing next time, durable and long lasting
EASY TO ASSEMBLE AND USE This threaded insert set with knurled nut is simple and easy to use. Simply insert the threaded insert into the bag or through hole, and then attach it firmly to the printed part by the heat of a soldering iron or ultrasonic wave, so that the nut and installation object form a certain friction and bite force, which is firm and adjustable, prevents falling, easy and convenient to use

10,98 €