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Updated: 06 Apr 2026

10 Best Nut Inserts

#1 Best Pick
130 Pieces 9 Size M4/M5/M6/M8/M10 Metric Threaded Inserts Nuts Assortment Tool Kit for Wood Furniture Zinc Alloy Furniture Bolt Fastener Connector Hex Socket Screw Inserts

130 Pieces 9 Size M4/M5/M6/M8/M10 Metric Threaded Inserts Nuts Assortment Tool Kit for Wood Furniture Zinc Alloy Furniture Bolt Fastener Connector Hex Socket Screw Inserts

Brand: THJOPOKEEL
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  • 【Valued Metric Threaded Inserts Nuts Assortment】 The wood insert assortment tool kit contains 30pcs M4*10 nutserts, 30pcs M5*10 nutserts, 20pcs M6*10 nutserts, 20pcs M6*15 nutserts,10pcs M8*20nutserts, 10pcs M10*25nutserts for installation(M4 M5 M6 M8 M10), totally 130pcs. A set contains 9 different size of wood threaded nut will meet your various demands.
  • 【Good Quality Material】Our screw-in nuts are made of high quality carbon steel with yellow zinc plated for excellent wear, rust and corrosion resistance, which is hard to oxidize, ensuring the long service time.
  • 【First Class Workmanship】The standard hex socket head is smooth and burr-free with tapered external threads that makes it hard to slip, won’t easily pull out caused by vibration. More stable and non-slip, beat choice for you.
  • 【Simple to Installation】These thread inserts are very easy to be installed, pre-drill a suitable hole, then screw it into the hole with the attached internal hex wrench! Notice: the hole diameter should be expanded appropriately while the furniture wood is very hard.
  • 【Wide Application】These inserts are very suitable for furniture hardwood/ solid wood, you can use them on head board and foot board of crib/bed, and they are also could be used for repairing file cabinets and chair leg glide additions.
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#2 Best Value
SNOKAY 230Pcs 11 Size M4/M5/M6/M8/M10 Metric Threaded Inserts Nuts Assortment Tool Kit Zinc Alloy Furniture Bolt Fastener Connector Hex Socket Screw Inserts for Wood Furniture Assortment

SNOKAY 230Pcs 11 Size M4/M5/M6/M8/M10 Metric Threaded Inserts Nuts Assortment Tool Kit Zinc Alloy Furniture Bolt Fastener Connector Hex Socket Screw Inserts for Wood Furniture Assortment

Brand: Snokay
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  • Package Includes: You will get 230 pcs furniture hex drive nuts in total, including m6*15 mm - 12 pcs, m8*15 mm - 10 pcs, m8*20 mm - 5 pcs, m10*15 mm - 3 pcs, m10*25 mm - 2 pcs, m4*8 mm - 30 pcs, m4*10 mm - 60 pcs, m5*10 mm - 45 pcs, m6*8 mm - 18 pcs, m6*10 mm - 32 pcs, m6*13 mm - 13 pcs.
  • Good quality materials: Metric thread,made of high quality zinc alloy, hardness of high resistance to rust, wear and corrosion-resistant environmental protection and aesthetic characteristics.
  • Wide Application: Suitable for soft woods of pine, plywood, fiberboard, etc, work ferfectly on the furniture combination. Pieces Pack of Furniture Screws Threaded Inserts for Wood Furniture.
  • Features of insert nut: These threaded inserts are inserted into a pre-drilled hole by screwing in, in that case the external protrusions bite into the wood, preventing the nut from either turning or pulling out.
  • Easy Installation: With even spiral thread and smooth surface, no burrs, just drill the appropriate size hole for the screw-in sleeves to be quickly screwed in with an Allen key.
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#3 Budget Pick
Swpeet 100Pcs 304 Stainless Steel Metric Lock Nut Assortment Kit Perfect for lock Washers, Nylon Insert Locknut M3 M4 M5 M6 M8 M10 M12

Swpeet 100Pcs 304 Stainless Steel Metric Lock Nut Assortment Kit Perfect for lock Washers, Nylon Insert Locknut M3 M4 M5 M6 M8 M10 M12

Brand: Swpeet
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  • ☛ MULTIFUNCTIONAL ASSEMNLY KIT ------ Advanced 304 stainless steel nylon locking nut, 7 common sizes, general, convenient, easy to use, very suitable for professionals and DIY users. This suite is one of the few products on the market. It has high quality and better quantity. It is an economical and efficient choice.
  • ☛ NYLON COLLAR ------ These lock nut manufactured with industrial strength, which can replace locking washers, prevent bolts from being exposed and provide better safety and firm fixation. Compared with locking washer, it has better performance because it is made of non-corrosive material.
  • ☛ HIGH QUALITY ------ Have strong anti-rotation ability, which can prevent the locking nut from weakening and loosening under vibration and torque, thus reducing the clamping strength. Guaranteed intact, unswerving, almost indestructible.
  • ☛ EASY TO STOREAGE ------ The rugged plastic box serves as a suitcase, allowing users to organize locking nuts in a neat manner according to size. It can also be stored in a garage, workbench or worksite as a convenient storage space. The transparency of the box allows users to check the quantity and inventory without opening the box.
  • ☛ WHAT YOU GET ------ In this kit, You will get 100Pcs 304 Stainless Steel Metric Lock Nut Assortment Kit. It consists of M3 ( 25Pcs ), M4 ( 25Pcs ), M5 (15Pcs), M6 ( 15Pcs ), M8 (10Pcs), M10 ( 5Pcs ) and M12 ( 5Pcs ). Allocate more of the commonly used locking nuts.
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#4 Top Choice
500Pcs Metric Knurled Nuts Assortment Kit Threaded Inserts M2 M2.5 M3 M4 M5 M6 Female Thread Knurled Nuts Portable Brass Heat Set with Storage Box for 3D Printers Electric Molding Machines

500Pcs Metric Knurled Nuts Assortment Kit Threaded Inserts M2 M2.5 M3 M4 M5 M6 Female Thread Knurled Nuts Portable Brass Heat Set with Storage Box for 3D Printers Electric Molding Machines

Brand: ZJMCAJY
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  • Enduring Brass: Made of brass for enduring and high resistance to breakage or deformation, they have a high temperature resistance of over 300°C/572°F and can effortlessly withstand the harsh heat generated by the plastic heat-setting process
  • Easy Installation: Enjoy an easy installation process with our knurled brass threaded inserts, which can be easily heated and integrated into the tapered holes of the plastic part
  • Sufficient Quantity and Multiple Sizes: 500pcs M2; M2.5; M3; M4; M5; and M6 female metric knurled nuts assortment kits in different lengths, 18 sizes in total, which can meet our basic needs at work and last long time
  • Wide Application: Suitable for mounting on 3D printers; electric molding machines; electric injection molding machines; automotive plastic housings; laptop molds; providing a reliable and long lasting solution
  • Portable: Equipped with plastic storage box, different sizes of threaded inserts are stored separately, easy to store, use and carry
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#5 Popular Choice
30 Pack M6-1.0mm Nylon Insert Lock Nuts,304 (A2-70) Stainless Steel Locknuts,Standard Metric Thread Nylock Nuts (M6, 30 Pack)

30 Pack M6-1.0mm Nylon Insert Lock Nuts,304 (A2-70) Stainless Steel Locknuts,Standard Metric Thread Nylock Nuts (M6, 30 Pack)

Brand: Eisbiek
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  • Package Content: 30 piece of M6 304 (18-8) stainless nylon insert lock nuts
  • 304 Stainless Steel Lock Nut: Nylon insert lock nut is made of high-quality 304(A2-70)stainless steel, rust-proof, corrosion resistance, sturdy, will not twist or deform, and has a long service life.With the spiral pattern is clear,the polishing process, the surface is smooth, no worry about scratching your hands
  • Nylon Insert Locknut: M6-1.0mm is standard metric threaded nylock nuts have reliable anti-loosening performance, so that it and the bolt threads to form a close fit, and in the role of the elasticity of the nylon friction resistance, in order to achieve the purpose of anti-loosening. Assembly torque is more stable, anti-loosening is very reliable, can be used in shock vibration occasions
  • Wide Application: Common uses for metric hardware nuts include securing instrument and equipment components, linking pipes and structural elements.Suitable for use or maintenance in a wide range of applications such as furniture decoration, automotive repair, the mechanical industry and small repairsaround shops, construction, etc
  • Convenient storage: Metric locknuts are individually stowed by type in an easy to carry clear case.Easy to store and use,so that the lock nuts will not be lost or mixed up during use
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#6 Top Pick
FullFun 388pcs Brass Threaded Inserts Heat Set Insert M2 M2.5 M3 M4 M5 M6 1/4-20 M8 Metric Female Knurled Embedment Nuts for Plastic and 3D Printing Injection Molding Assortment Kit

FullFun 388pcs Brass Threaded Inserts Heat Set Insert M2 M2.5 M3 M4 M5 M6 1/4-20 M8 Metric Female Knurled Embedment Nuts for Plastic and 3D Printing Injection Molding Assortment Kit

Brand: FullFun
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  • PACKAGE CONTENT: You will get 388pcs M2 M2.5 M3 M4 M5 M6 1/4-20 M8 3D printing threaded inserts 8 sizes with 8xSoldering Tips for Heat-Set Insert, super large quantity can meet your needs of connecting numerous 3D printing accessories. Please ensure that the size of the brass threaded inserts can well match your 3D printer
  • BRASS THREADED INSERTS: The heat-set threaded inserts for 3D printing are made of quality brass, extremely sturdy, not easy to break or deform, also can withstand high temperatures above 300°C / 572°F. Excellent thermal conductivity also makes your 3D printer work more effectively
  • EASY TO USE: The knurled threaded inserts can be easily installed into the tapered holes of 3D printers by heating and also can be molded by injection molding. The 3D printing brass nuts with full knurled patterns can perfectly match your 3D printers. Practical nuts make your 3D printer work well
  • TWILL THREAD KNURLED NUT: With a clean surface and twill thread knurled patterns, the threaded inserts can be installed onto 3D printers and fit perfectly, and won't scratch your precious 3D printing parts. The smaller diameter of the front end of the threaded inserts nuts allows you to insert them into a 3D printing hole precisely. Inclined thread knurls increase the torque resistance, so they can be fixed on the 3D printers tightly
  • WIDE APPLICATIONS: These heat-set threaded inserts can be inserted into various plastics, such as PC, PA, PLA, ABS, PETG, etc. Suitable for installing on 3D printers, electrical molding machines, electrical injection molding, automotive or laptop molding plastic shells, etc
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#7 Top Pick
AcbbMNS 20Pcs M8 x 20mm Threaded Inserts Nuts Furniture Screw in Nut Wood Inserts Bolt Fastener Connector Hex Socket Drive for Wood Furniture Assortment (M8x20mm,20pcs)

AcbbMNS 20Pcs M8 x 20mm Threaded Inserts Nuts Furniture Screw in Nut Wood Inserts Bolt Fastener Connector Hex Socket Drive for Wood Furniture Assortment (M8x20mm,20pcs)

Brand: AcbbMNS
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  • 【Material】This threaded inserts for wood are made of high quality galvanized iron, hardness of high resistance to rust, wear and corrosion-resistant.
  • 【Design】Standard hex socket head is smooth and flat, with flanged thread texture, more stable and non-slip.
  • 【Usage Steps】Threaded inserts are easy to install, pre-drill a proper hole, screw-in with Screws Threaded Inserts.
  • 【Wide Application】Have a good effect in the furniture combination, Suitable for soft woods of pine, plywood, fiberboard, etc,
  • 【Package Include】20pcs M8 x 20mm Furniture Screws Threaded Inserts for Wood Furniture.
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#8 Top Pick
FullFun M2 M3 M4 M5 M6 (300pcs) Brass Threaded Inserts, Heat Set Insert, Metric Female Knurled Embedment Nuts for Plastic and 3D Printing Injection Molding Assortment Kit

FullFun M2 M3 M4 M5 M6 (300pcs) Brass Threaded Inserts, Heat Set Insert, Metric Female Knurled Embedment Nuts for Plastic and 3D Printing Injection Molding Assortment Kit

Brand: FullFun
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  • PACKAGE CONTENT: You will get 300pcs M2 M3 M4 M5 M6 3D printing threaded inserts 5 sizes, super large quantity can meet your needs of connecting numerous 3D printing accessories. Please ensure that the size of the brass threaded inserts can well match your 3D printer
  • BRASS THREADED INSERTS: The heat-set threaded inserts for 3D printing are made of quality brass, extremely sturdy, not easy to break or deform, also can withstand high temperatures above 300°C / 572°F. Excellent thermal conductivity also makes your 3D printer work more effectively
  • EASY TO USE: The knurled threaded inserts can be easily installed into the tapered holes of 3D printers by heating and also can be molded by injection molding. The 3D printing brass nuts with full knurled patterns can perfectly match your 3D printers. Practical nuts make your 3D printer work well
  • TWILL THREAD KNURLED NUT: With a clean surface and twill thread knurled patterns, the threaded inserts can be installed onto 3D printers and fit perfectly, and won't scratch your precious 3D printing parts. The smaller diameter of the front end of the threaded inserts nuts allows you to insert them into a 3D printing hole precisely. Inclined thread knurls increase the torque resistance, so they can be fixed on the 3D printers tightly
  • WIDE APPLICATIONS: These heat-set threaded inserts can be inserted into various plastics, such as PC, PA, PLA, ABS, PETG, etc. Suitable for installing on 3D printers, electrical molding machines, electrical injection molding, automotive or laptop molding plastic shells, etc
Check latest price on Amazon
#9 Top Pick
FullFun M2 M3 M4 M5 M6 (200pcs) Brass Threaded Inserts, Heat Set Insert, Metric Female Knurled Embedment Nuts for Plastic and 3D Printing Injection Molding Assortment Kit

FullFun M2 M3 M4 M5 M6 (200pcs) Brass Threaded Inserts, Heat Set Insert, Metric Female Knurled Embedment Nuts for Plastic and 3D Printing Injection Molding Assortment Kit

Brand: FullFun
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  • PACKAGE CONTENT: You will get 200pcs M2 M3 M4 M5 M6 3D printing threaded inserts 5 sizes, super large quantity can meet your needs of connecting numerous 3D printing accessories. Please ensure that the size of the brass threaded inserts can well match your 3D printer
  • BRASS THREADED INSERTS: The heat-set threaded inserts for 3D printing are made of quality brass, extremely sturdy, not easy to break or deform, also can withstand high temperatures above 300°C / 572°F. Excellent thermal conductivity also makes your 3D printer work more effectively
  • EASY TO USE: The knurled threaded inserts can be easily installed into the tapered holes of 3D printers by heating and also can be molded by injection molding. The 3D printing brass nuts with full knurled patterns can perfectly match your 3D printers. Practical nuts make your 3D printer work well
  • TWILL THREAD KNURLED NUT: With a clean surface and twill thread knurled patterns, the threaded inserts can be installed onto 3D printers and fit perfectly, and won't scratch your precious 3D printing parts. The smaller diameter of the front end of the threaded inserts nuts allows you to insert them into a 3D printing hole precisely. Inclined thread knurls increase the torque resistance, so they can be fixed on the 3D printers tightly
  • Wide Applications: These heat-set threaded inserts can be inserted into various plastics, such as PC, PA, PLA, ABS, PETG, etc. Suitable for installing on 3D printers, electrical molding machines, electrical injection molding, automotive or laptop molding plastic shells, etc
Check latest price on Amazon
#10 Top Pick
FullFun 130PCS Metric Threaded Inserts Nuts for Wood, M4/M5/M6/M8/M10 Zinc Alloy Screw-in Nut Wood Inserts, Threaded Inserts Assortment Tool Kit for Furniture, Wooden Products, and Wooden Models

FullFun 130PCS Metric Threaded Inserts Nuts for Wood, M4/M5/M6/M8/M10 Zinc Alloy Screw-in Nut Wood Inserts, Threaded Inserts Assortment Tool Kit for Furniture, Wooden Products, and Wooden Models

Brand: FullFun
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  • THREADED INSERTS ASSORTMENT KIT: M4 M5 M6 M8 M10 Threaded Inserts for Wood, external protrusions bite into the wood, providing superior holding power and preventing the insert nuts from either turning or pulling out in all applications. A total of 7 different sizes can meet your different needs
  • COLOR ZINC PLATED: Metric thread inserts are made of zinc alloy, color zinc plated on the surface has good corrosion resistance in bad environments like high temperature, high hardness, and perfect wear resistance, and can guarantee a longer service life
  • SMOOTHER SURFACE: Our threaded wood inserts are burr free and smoother, with no worry about scratching your hands and furniture
  • EASY INSTALLATION: These threaded inserts are very easy to install, requiring only drilling a suitable-sized hole and installing with a hex key. In softwood, the external threads cut easily into the wood with just a properly sized hole. In hardwood, you need to drill a hole close to the outside thread diameter
  • WIDE APPLICATIONS: These Hex Socket Insert Nuts are perfect for furniture manufacturing and repair, wood product manufacturing, arts and crafts, wooden boat building, and more. Whether you're a professional woodworker or a DIY enthusiast, these inserts provide convenient and durable threaded connections for your projects
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