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Best Nut Inserts - Holiday Sale

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Last Updated - 16.12.2025

Best Choice

01

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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9.9

Exceptional

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 other 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, 5 pieces 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 €
02

Bolatus

360 x Threaded Insert M2 M2.5 M3 M4 M5 M6, Bolatus Melting Nuts Brass with Soldering Iron Melting Aid, Knurled Melting Thread for Plastic Parts, Thread Inserts for 3D Printer Parts

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9.8

Exceptional

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: the brass thread inserts are suitable for 3D printers, digital cameras, computers, plastic car parts, circuit board assembly, electronic products and most plastic firmware
Welding tool kit: welding rods with welding connectors (compatible with M2, M2.5, M3, M4, M5, M6, thread specifications) and adapters for quick replacement and effective adjustment to the melt
Strong and stable: Diagonal external thread design increases friction, ensures good stability and increases torque strength
Quality material: melting nuts and welding columns melting aid kit made of brass, with good thermal conductivity, not easy to deform. The surface is smooth and the thread is clear
Easy to use: Install the thermal head with threaded insert on the welding rod and then insert it into the threaded hole of the threaded plug to heat it. After heating, press the melting thread into the plastic part

12,74 €
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

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: 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.

9,23 €
Value for Money

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

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

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 €
05

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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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

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 €
06

ruthex

ruthex M3 Threaded Insert, Pack of 100 RX-M3x5.7 Lead-Free Threaded Bushings Made of Brass, Sturdy Insert Nut for Plastic Parts, Heat Insertion in 3D Printed Plastic Parts

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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

Suitable for various plastics: The inserts are designed for all thermoplastic plastics. The knurled nuts hold, for example, in PLA, PETG, ABS, PPS, PP and many more. As soon as the plastic of the part around the brass sleeve cools and hardens, the internal threaded sleeve is firmly anchored.
Sturdy and durable screw-in thread: The internal thread inserts are made of premium-quality brass, which ensures optimal corrosion resistance and thermal conductivity. Thus, each insert nut can be used for a long term and is easy to insert. The screw-in thread can also be reused by carefully removing it from the printed part if it is no longer needed.
Practical thread insert set: The ruthex RX-M3x5.7 thread insert set consists of 100 insert nuts with M3 internal thread and a length of 5.7 mm. The threaded sleeves can be inserted through ultrasonic insertion and heat embedding.
M3 thread inserts for your 3D printed parts: The ruthex threaded nuts can be subsequently inserted in parts from 3D printers by, for example, Anycubic, Prusa. Using a soldering iron or ultrasonic, the insertion nuts are simply embedded in a blind hole or through hole.
Firm hold and easy application: Thanks to the geometry of the threaded sleeve, it holds firmly in the printed part. The opposite spiral-shaped knurled nuts ensure a balanced high tightening and loosening torque as well as a high tightening force. The guide makes insertion much easier.

8,99 €
07

Hapric

Pack of 200 Threaded Insert, M4 Screw-In Nut Melting Thread Repair Set with Storage Box Tweezers for 3D Printing Parts Plastic Parts

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9.3

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

Thread repair set: the pack contains 200 threaded inserts with the dimensions M4 x 6 x 6 mm as well as a storage box and tweezers. Please confirm the required screw-in nut size before purchasing.
Note: The threaded insert is made by hot pressing process, and workers should wear insulating gloves during operation to avoid possible safety risks during operation.
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.
Durable and stable: the threaded insert is made of brass, which has good thermal conductivity and is not easily deformed. The surface is smooth and the threads are clear. Diagonal threads ensure a snug fit and increase torque strength.
Application: thread insert is specially designed for thermoplastics. It attaches seamlessly to plastic parts. It is also suitable for 3D printers, digital cameras, computers, plastic car parts, circuit board assembly, electronic products, etc.

10,99 €
08

HAOYULUO

Pack of 300 Threaded Inserts, Press-in Nuts with Label, M2, M2.5, M3, M4, M5, M6 Melting Thread, with Sorting Box, Threaded Inserts, for 3D Printing Accessories and Plastic Parts by Heat or Ultrasonic

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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

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 €
09

Dottall

Pack of 300 Threaded Insert M2 M2.5 M3 M4 M5 M6 Press-in Nuts Brass Threaded Bushings Female Thread Knurled Nuts with Sorting Box for Plastic Parts by Heating or Ultrasonic in 3D Printers

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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

The package contains: 300 pieces M2 M2.5 M3 M4 M5 M6 threaded insert push nuts and a transparent storage box, if you have any questions, please do not hesitate to write to us.
Precision Knurled Nuts: insert nuts with brass inserts have high precision threads, compatible with the corresponding screws, smooth and burr-free surfaces, standard round shape, firm and flat, easy to assemble.
Plastic Applications The threaded nuts are designed for thermoplastic applications. Plastics PLA, PETG, ABS, PPS, PP etc., which are widely used in notebooks, electrical appliances, toys, motorcycles and various plastic housings.
Easy to use: powerful press-on nut, easy insertion of the press-on nut into a blind or through hole by means of ultrasonic or heat (soldering iron).
Durable material: the Dottall press nuts are made of high-quality brass, acid and alkali resistant, oxidation resistant and excellent workmanship to ensure a long service life and easy pressing.

8,99 €
10

Caianwin

Caianwin Pack of 50 Threaded Insert M3 Press-in Nuts Knurled Melting Thread Made of Brass Insert Nut for Plastic Parts - By Melting into 3D Printing Parts

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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

Wide application: these threaded sleeves are designed for use with all thermoplastic plastics, including materials such as PLA, PETG, ABS, PPS, PP and others. Whether in 3D printed objects, injection moulded parts, automotive plastic housings or laptop shells, these inserts offer reliable and durable solutions.
Package includes: 50 pieces thread inserts, size: M3 x 5.7 x 4.6 mm. Please make sure the size of the nut effectively fits your plastic parts.
High-quality material: our brass thread inserts are made of high-quality brass and are precisely processed, which ensures excellent heat conduction and corrosion resistance.
Fit for your 3D printed parts: With the help of the heat of a soldering iron or ultrasound, the insert nuts are simply embedded in a blind or through hole, providing a reliable and safe method for attaching components in 3D printing projects.
Firm hold: High-precision thread ensures stability and reliability and prevents the thread from slipping during rotation. The 45 degree angled knurling greatly increases torque resistance and tensile strength and ensures stronger attachment.

5,99 €