Best Steel Locknuts in 2026
Daisy
Last Updated: Feb 10, 2026
Daisy
Last Updated: Feb 10, 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 |
|---|---|---|---|---|
| MewuDecor Online | 9.86 | ✅ | ✅ | ✅ |
Made of high quality Stainless Steel 304 which offers a high level of chemical and corrosion resistance.
Nut Type: Metric Nylon Insert Flange Lock Nut.
Thread Diameter: M8; Thread Pitch: 1.25mm; Flange Diameter: 16.4mm.
Package Included: 10 x Nylon Insert Flange Lock Nuts.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| EVEAGE DIRECT | 9.87 | ✅ | ✅ | ✅ |
🍀· 12 Most Popular SAE and Metric Sizes: this 320pcs hex nuts kit includes 1/4-20 (45 pcs), 8-32 (30 pcs), 10-24(30 pcs), 5/16-18 (20 pcs), 3/8-16 (5 pcs), M3(65 pcs), M4(37 pcs), M5(30 pcs), M6(25 pcs), M8(17 pcs), M10(10 pcs), M12(6 pcs) which allocates commonly applied lock nuts. Great fasteners for professional users and DIY projects
🍀· Sturdy and Durable: These Lock Nuts are quality 304 stainless steel, with good processing,rust resistant performance, high toughness, widely used in industry and furniture decoration industry and food medical industry.
🍀· Lock Effectively Even Multiple Time Uses: With nylon insert collar that is non-corrosive, these hex nuts greatly reduce loosening under vibrations and torque, providing better security and firm hold and a large number of use shows that the lock nut after repeated tightening and disassembly, the locking force does not decrease and can maintain the original effect.
🍀· Superior Vibration Resistance: when the thread is tightened, the thread line of the top of the bolt is tightened into the 30° wedge bevel of the nut, the force generated by the lock nut is much greater than the ordinary nut, which has great anti-loosening and anti-vibration ability.
🍀· WORRY-FREE: VIGRUE provide service for our product quality problem, if you're unhappy with our product for any reason, please feel free to contact us, we will solve the problem. NO HASSLE LIFETIME SERVICE If you need a single size or different quantity, welcome to contact
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Swpeet | 9.86 | ✅ | ✅ | ✅ |
☛ 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.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| PGMJ | 9.90 | ✅ | ✅ | ✅ |
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
Package include: 7 sizes include M4*10, M5*10, M6*10, M6*15, M8*15 M8*20, M10*25, total 130 pieces in a transparent box with can meet your different needs
Usage and install: pre-drill a proper hole, screw in with internal hex tool; Unique self-tapping designed external thread, contribute to tapping, with good tensile resistance, install with hex key, tapered external threads makes it not easy to pull out caused by vibration
Wide application: suit for soft woods such as pine, plywood, fiberboard, etc., such as ready-to-assemble furniture, drawer pulls, display case, and shipping crates，have a good effect in the furniture combination
The compartments in the box are movable, and they are are also installed underneath the box, after the tool is used up ,you can pack other things in a box, and you can freely use the compartments and recycle them
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Connectors & Wire & Tools | 9.90 | ✅ | ✅ | ✅ |
1. Product Type: High quality nylon insert lock nuts
2. Material: Made of superior 304 stainless steel, strong and durable
3. Package: This kit include 7 sizes of M3 M4 M5 M6 M8 M10 M12 total 175pcs in a clear box
4. Feature: With nylon washer that creates friction with the mating threads to prevent loosening, makes it better locking ability
5. Application: Can be widely used in automobile, construction machinery, shipbuilding and etc
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| BaBaoRui | 6.87 | ✅ | ✅ | ✅ |
Premium Material: These lock nuts and washers are made of excellent 304 stainless steel and nylon material, which is corrosion and rust resistant, not easy to damage and crack, sturdy and durable for long term use.
Lock Nuts: Stainless steel nylon locknut can prevent loosening, available in 7 sizes: m3 x 30pcs, m4 x 25pcs, m5 x 25pcs, m6 x 25pcs, m8 x 12pcs, m10 x 9pcs. , m12 x 6 pieces.
Flat Washers: Flat washers are mainly used for decompression and friction reduction, leakage prevention, isolation, etc. There are 9 types: M2 x 168pcs, M2.5 x 168pcs, M3 x 150pcs, M4 x 140pcs, M5 x 82pcs, M6 x 60pcs, M8 x 50pcs, M10 x 20 pcs M12 x 10 pcs
Wide Applications: The lock nut and washer set is the perfect component for electrical connection of folding beds, cabinets, electric hair clippers, motors, textile machines, household appliances, commercial appliances, automobiles and boats, etc.
Package Includes: In the sizes of: M2/M2.5/M3/M4/M5/M6/M8/M10/M12 a total of 980 pieces. The locking nuts are all in the storage box, so you can easily find the size you want without losing them. This kit provides ample space to replace lock washers and prevent bolts from falling out and loosening.
Here is the list of top-rated brands that were evaluated by PM.
| Brand | Count |
|---|---|
| Bayidun | 1 |
| Glarks | 1 |
| Mewudecor | 1 |
| Pgmj | 1 |
| Swpeet | 1 |
| Vigrue | 1 |
We've carried out a comprehensive analysis of 958 reviews on locknuts, using our selection criteria to identify the best options in the fasteners. Our findings reveal that most customers typically select locknuts priced around $13.64, with top brands including e-z lok, aspen hardware-locknuts, glvaner, hard-to-find fastener, bayidun, binifimux, eastlo and mewudecor and swpeet
Our team of expert editors reviewed these high-quality items and handpicked the top 6 locknuts for your consideration. We've also done extensive research on numerous sellers, identifying the best ones in the fasteners category. These include aspen fasteners llc, gvn online, amazon.com, babaorui, windfly, eastlo and mewudecor online and swpeet .
We are dedicated to assisting our users in finding the right locknuts Products based on their needs, saving them considerable time when choosing which locknuts to buy. We take pride in the number of satisfied users we've helped through our thorough and insightful reviews.
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