Best Locking Nuts 2025

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Last Updated - 27.07.2025

Best Choice

01

HOLMOL

Pack of 250 Hexagonal Nuts, HOLMOL DIN 985 Self-Locking Nuts Stainless Steel with Box, Locking Nuts for Screws, Self-Locking Nuts Set, A2 V2A Stainless Steel Nut with Metric Standard Thread

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9.9

Exceptional

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Main highlights

Stainless steel nuts: the nuts for screws are widely used in mechanical engineering, furniture industry, automotive construction, aerospace and other areas. Please choose the appropriate size of the stainless steel nuts for screws according to the specific application scenario and requirements.
PREVENTS LOCKING: Our hex nut is equipped with a nylon insert that helps the nuts stainless steel and prevents loosening. Insert nuts for bolts to keep joints stable and secure by increasing friction or providing additional support.
Hexagonal nut set: includes 250 pieces hex nut nuts, 60 pieces M2, 50 pieces M3, 40 pieces M4, 40 pieces M5, 30 pieces M6, 15 pieces M8, 10 pieces M10, 5 pieces M12.
EASY TO ASSEMBLE First, insert the hex nut into the mechanical screw hole where it should be fixed, then screw the hex nut onto the bolt and tighten it.
DIN 985 SECURITY NUTS Our self-locking stainless steel nut for screws are made of 304 stainless steel with smooth surface, which are durable, fixing and rustproof.

12,99 €
02

Zhujiehigh

325 Piece Hex Nut Set, Locking Nuts, Self-Locking Nuts, Screw Nuts, Stop Nuts, Lock Nuts Set, Hexagonal Nut Assortment Set for Thread Inserts, M3 M4 M5 M6 M8 M10 M12

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9.8

Exceptional

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Main highlights

The package includes: total 325 pieces, quantity and size include: 100 pieces m3, 60 pieces m4, 60 pieces m5, 50 pieces m6, 30 pieces m8, 20 pieces m10, 5 pieces m12, sufficient quantity and rich sizes to meet multiple scenes and field use requirements.
Nylon Insert Design The design of the nylon insert can increase the friction between nylon and thread to prevent loosening caused by vibration, fix it more firmly and prevent the nut from loosening under the action of vibration and torque.
Multi-scene application: suitable for various precision machines, security instruments, electronic products, household appliances, communication products, faucets, locks, lamps and other fields. Suitable for professionals, DIY enthusiasts, hobbyists, carpenters, landlords, maintenance workers, etc.
Hexagonal locking nut: self-locking nuts can replace the lock washer to prevent the bolt from being exposed and to prevent the accidentally moved bolt from falling off. It has a strong anti-twist lock and ensures a firm fixation as well as better safety and stability.
Durable & Sturdy Material The hex nut set is made of high quality stainless steel, with exquisite craftsmanship, not easily deformed, not easily broken, corrosion resistant, rust resistant, high strength, high hardness and long lasting durability and stability.

11,99 €
Value for Money

03

TVNYOUJIA

Pack of 200 Locking Nuts Assortment, Stainless Steel Self-Locking Nuts, M3 M4 M5 M6 M8 M10 M12 Threaded Inserts Hex Nut Set, Various Nylon Locking Nuts

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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 threaded sleeve nuts can be used to screw on bolts as well as threaded rods and cylinder screws. Ideal for folding beds, wardrobes, miners, engines, textile machinery, workshops, engines, etc.
What you get: you will receive 200 pieces/7 sizes of the most commonly used locking nuts, including 5 pieces M2 nuts, 50 pieces M3 nuts, 45 pieces M4 nuts, 40 pieces M5 nuts, 30 pieces M6 nuts, 15 pieces M8 nuts, 10 pieces M10 nuts and 5 pieces M6 nuts. 12 Nuts.
Nylon Insert: Threaded hex nut to prevent loosening, nylon insert prevents loosening and holds the nut firmly in case of vibration. These threaded inserts are waterproof, rust-proof and durable.
Excellent material: our nut assortment is made of high-quality stainless steel and nylon, which is corrosion resistant and can prevent loosening and twisting. Durable for long-term use.
Easy to store: Individual organiser compartments are designed for easy storage. Thanks to the all-round transparent box, you can easily see self-locking nuts assortment inside even when stacked. Very strong and will not open during delivery.

10,99 €
04

YOUYIDUN

510 Pieces M2 M3 M4 M5 M6 Hex Nuts and Flat Washers Set: 255 Self-Locking Nuts + 255 Washers, Stop Nuts Locking Nuts Hex Nut Lock Washers Assortment

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9.4

Excellent

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Wide Applications Widely used in electrical connections, mechanical parts, industry, automobiles, ships, generators, factories, maintenance, installation and other fields
Package includes: a total of 510 pieces, including 255 self-locking nuts and 225 metal washers, sizes include M2, M3, M4, M5, M6, sufficient and abundant quantity to meet daily needs
Metal washers for screws: washers for screws can distribute pressure on the contact surface of bolts and other fasteners, reduce friction, prevent leakage and looseness
Hex Nuts Assortment: lock nuts can prevent the screws from being exposed and accidentally moving and falling off. It has strong anti-twist protection, which ensures firm fixation and better safety and stability
Durable material: hex nuts and washers for screws are made of high quality carbon steel, with exquisite workmanship, not easy to deform, not easy to break, are corrosion resistant, rust-proof, high strength, high hardening and durable

7,99 €
05

Connex

Connex DP8500111 Locking Nut Assortment 120 Pieces – Various Sizes in Set (M3, M4, M5, M6, M8, M10) – Galvanised – Pre-sorted in Practical Plastic Box / Locking Nuts / Assortment Box

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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

Tidy and clear storage
Suitable for securing screw connections
Quick sorting after use
Optimal equipment for home and workshop
Housed in a practical and reusable transparent box
Compact size is easy to store

3,49 €
06

But the cow

Pack of 200 Hex Nuts M3 M4 M5 M6 M8 Hex Nuts Assortment, Locking Nuts Carbon Steel, Stop Nuts Set, Self-Locking Nuts for Screws Washers Threaded Rods

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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: applicable to various precision machines, household appliances, sorting instruments, communication products, electronic products, car repair and other fields. Ideal for professionals, enthusiasts, carpenters, landlords, maintenance workers or other DIY projects.
PACKAGE INCLUDES 200 pieces in total, sizes and quantities include: 70 pieces M3, 60 pieces M4, 40 pieces M5, 20 pieces M6, 10 pieces M8, sufficient quantity and rich sizes to meet the usage needs of multiple scenes and areas, it is an indispensable hardware for home or work.
Hex Nuts Set: Our hex nuts are usually used in conjunction with bolts or screws to prevent the bolts from being exposed and falling off, help grip the threads to prevent loosening, ensure a firm attachment and better strength.
Fine material: nuts set are made of high-quality carbon steel, high strength, high-hardening, corrosion-resistant, not easy to rust, break or deform, can perform well in harsh environments and are durable and stable.
Easy to store: all self-locking nuts are stored in a transparent and durable storage box with compartments, and the different sets are stored separately, well organised, easy to carry and find, so there is no confusion during transport and the use is convenient.

5,99 €
07

SZSLMY

Hex Nuts Set, 310 Pieces Self-Locking Nuts Assortment Set, Locking Nuts, Screw Nuts, Carbon Steel Hex Nuts, Threaded Inserts - M3 M4 M5 M6 M8 M10 M12

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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 range of applications: suitable for all kinds of precision machines, household appliances, classification instruments, communication products, electronic products, automotive maintenance and other fields. Ideal for professionals, hobbyists, carpenters, landlords, repair workers or other DIY projects.
Use with bolts and screws: self-locking nuts are generally used with bolts or screws of the same thread size, prevents bolts from being visible and falling out, helps to hold threads to prevent loosening, ensures a strong attachment and ensures better stability.
The package includes: you will receive a total of 310 pieces, including 100 pieces M3, 55 pieces M4, 60 pieces M5, 40 pieces M6, 30 pieces M8, 20 pieces M10, 5 pieces M12, the quantity is sufficient and the size is enough to meet different occasions and field requirements.
Easy storage: all locking nuts assortment are stored in a transparent and sturdy storage box with compartments marked with the size and the corresponding quantity, so you can quickly find the size you need, do not cause mess during transport and are easy to use.
Carbon steel material: these nuts set are made of high-quality carbon steel material, have high strength, high hardness, corrosion and rust resistance, are not easy to break or deform, can maintain good performance in harsh environments and are durable.

8,99 €
08

YIYICO

YIYICO Self-Locking Nuts Assortment Hex Nuts Locking Nuts 200 Pieces M3 M4 M5 M6 M8 M10 M12 Lock Nuts Stainless Steel Nut Set

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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

Widely used: the screw nut can be used for screwing on screws as well as threaded rods and head screws. Suitable for daily installation or repair of furniture, engines, automobiles, motorcycles, folding beds, cabinets, miners, engines, textile machinery, workshops, engines, etc.
Premium material: made of high-quality 304 stainless steel and nylon material, is of high hardness, not easy to deform, wear-resistant, and rustproof. One of the highest forms of corrosion resistant metals, making it last longer than other nuts on the market today. The nylon insert helps the nut lock more firmly and does not loosen.
Perfect design: the nylon insert is equipped with a thread to hold the lock nut and prevent loosening. Nylon insert is mainly used for pressure reduction and friction reduction, to avoid leaks and for pressure relief. The combination of nylon insert and hex nuts perfectly solves most problems in life.
Package includes: a total of 200 stainless steel nuts, M3 x 55, M4 x 45, M5 x 40, M6 x 30, M8 x 15, M10 x 10, M12 x 5, a storage box. The heavy duty polymer insert nuts are highly resistant to turning, so the locking nuts will not weaken and looser under the vibration and torque, which reduces the resistance of the shimmer.
Easy to use: the hex nut nuts with individual organiser compartments are designed for easy storage. The all-round transparent box makes it easy to see items inside, even when stacked, you can easily find the necessary parts in the storage box and do not lose them. and is convenient for daily classification and use.

10,99 €
09

JORREP

Pack of 180 Hexagonal Nuts Locking Nuts Stainless Steel Nuts 7 Sizes Self-Locking Stop Nuts Hex Screw Nuts M3 M4 M5 M6 M8 M10 M12

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8.8

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 range of applications: JORREP 7 sizes stainless steel locking nut assortment kit are often used for all types of precision machines, classified instruments, instruments, electronic products, household appliances, communication products, locks, lamps, lights, etc.
Top 304 stainless steel: Metric lock nuts are made of 304 stainless steel with good corrosion resistance and superior rust resistance in bad environments such as high temperatures, cold weather or areas with high humidity, which can ensure long-term use.
Perfect and unique storage box: Unlike the bagging mode of other brands' products, JORREPS Box uses thickened and reinforced dividers inside to neatly arrange lock nuts of different sizes while creating clear double-sided labels on the box.
Nylon insert contact nuts: Lock nuts are embedded with nylon inserts, so that they and the screw threads form a tight fit, and in the role of elasticity of the nylon, friction resistance is achieved to achieve the purpose of loosening. Superior vibration resistance, abrasion and shear resistance as well as good performance with repeated use.
Combination set with multiple sizes: Unlike the single size of most products on the market, JORREP has adjusted 7 sizes based on customer feedback and market research to form a 180-piece lock nut set, the M3-80 pieces, M4-40 pieces, M5-20 pieces, M6-16 pieces, M8-16 pieces. M10, M10- 4 pieces, M12-4 pieces.

10,88 €
10

Alnicov

Alnicov Strings Locked Nut 42 mm for Floyd Rose Tremolo Bridge (Black)

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8.7

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

This is a design for the top mount where the mounting screws go through the top of the device
Tailpiece length: 42 mm, locking nut, which can be used with your double locking system
String spacing: 7.2 mm (0.27 inches)
Material: zinc alloy / copper
Lock nut for Floyd Rose tremolo units

4,99 €