Best M4 Lock Washers in 2026

✓ 1600W POWERFUL MOTOR - 1600W-Watt motor for maximum MAX PSI cleaning power. A 20-foot high-pressure hose and a 35-foot power cord allow for flexible use in large areas. Pressure Washer for cleaning cars,bicycles,fences,patios,sidewalks,sidings,garden,yard,outdoor furniture and more. Powered using an air cooled industrial motor and the power washer surface cleaner will blast through grime and dirt to restore your surfaces. Save your time and money

✓ LEAKPROOF CONNECTIONS - Professional metal garden hose connector and 22mm metal water outlet. Comes with a 20ft high-pressure hose (metal connection) to avoid annoying water leakage.Water inlet temperature(max) is 104 degrees Fahrenheit to optimize the problem of leaking water and bring the best experience to you

✓ TSS (Total Stop System) - Power Washer Electric Features Safety Automatic Total Stop System, Which Can Automatically Turn Off The Machine When Trigger is Not Engaged to Save Energy And Prolong Working Life. The spray gun has a safety lock which is safer and more reliable. The unique plug-in spray gun makes it more convenient.This pressure washer is IPX5 waterproof and features a GFCI plug to prevent electric leakage, allowing you to safely operate this machine without any safety concerns

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Products including all types of screws, rivets, socket head cap screws, flange bolts and nuts, concrete anchors, split pins, stainless steel fasteners, brackets, U-bolts; in fact virtually anything!

GALVANIZED STAINLESS STEEL: These lock and flat washers provide excellent protection and security for nuts and bolts. They are made with galvanized stainless steel for long-term use and outstanding durability.

VERSATILE & COMPATIBLE: These assorted washers come in multiple sizes to fit all your screws, nuts, and bolts. Each washer features a solid bearing surface to prevent the nut or bolt head from tearing through the material.

OPTIMAL SURFACE AREA: Each stainless-steel flat or lock washer easily deflects the screw or bolt load, spreading the weight evenly for a secure and sure fit. These washers for screws and bolts are ideal for use at home or in the workshop.

【800 Pcs Washers for Screws】800 Pcs stainless steel flat washers for screws bolts, 9 different sizes M2（210 Pcs) M2.5（200 Pcs） M3（100 Pcs） M4（100 Pcs） M5（70 Pcs）M6（40 Pcs ） M8（50 Pcs ） M10（20 Pcs ） M12（10 Pcs ），Total：800 pcs / 9 different sizes fender washers assortment set kit can meet your different needs.

【Top 304 Stainless Steel】Our assorted hardware Lock metal washers, is made of top 304 stainless steel which has the advantages of high hardness, well wear-resistance, corrosion resistance and rust resistance. Which can ensure long time using even in bad environment like high temperature, cold weather, and high humidity areas.

【Widely Application】Fender washers assortment set kit, perfect for interior decoration, outdoor construction, electrical maintenance and furniture repair, The flat washers could be used for fixing bolts with smaller diameter than the hole of washers.

Commonly used in applications using a bolt or a screw where two pieces are being joined together

Split ends grip the material surface to prevent loosening during vibration

18-8 Stainless Steel finish for good corrosion resistance

Quality and strong standard type 400 series stainless steel

Each pack is professionally heat sealed and labeled by Marine Bolt Supply

Offered in convenient small or large quantity packs

2050 Max PSI (at initial discharge per CSA internal pressure testing) of Deep-Cleaning Water Pressure and Up To 1.76 GPM (without nozzle at minimum pressure) Water Flow

Pro-Style Steel Extendable 17.5 inch Wand with Quick-Connect Nozzles (0 Degree, 15 Degree, 25 Degree, Turbo, and Soap Applicator)

Super Compact and Lightweight at 16.5” Tall and 19 lb. for Convenient Storage and Portability - Four Quick-Lock Wheels with 360 Degree Steering Design and Low Center of Gravity Engineered for Anti-Tipping Design

【✔】High Quality Stainless Steel External Tooth Star Lock Washers Assortment Set

【✔】Set Includes 8 Most Used Sizes: M2.5 M3 M4 M5 M6 M8 M10 M12 【Metric, please See Picture 2 for Specific Dimensional Size】

【✔】Made of 304 Stainless Steel Material, Very Good Corrosion Resistance, It Can Be Used in a Humid Environment

√【Kindroufly Combination】: M2 (200 pieces), M2.5 (200 pieces), M3 (100 pieces), M4 (100 pieces), M5 (72 pieces), M6 (50 pieces), M8 (50 pieces), M10 (20 pieces), M12 (8 pieces), total 9 sizes 800pieces, different sizes and enough quantities can meet your different daily needs.

√【High Quality Stainless】: Kindroufly fender washers are made of 304 stainless steel, which have smooth surface, high strength, not easy to deform, corrosion resistance and rust resistance, can ensure a long time using in bad environment like high temperature, cold weather, and high humidity areas.

√【Fender Washers Function】: Flat washers are commonly used to prevent nuts from loosening. Our flat washers are well made, with smooth and shiny surface, highly compatible with screws, nuts and bolts of same sizes and feature solid bearing surface to prevent nut/bolt head from tearing through material.

【Sizes】M2 M2.5 M3 M4 M5 M6 M8 M10 M12, total 900 pieces/9 sizes of the most commonly used black zinc washers, flat washers, metal washers in a plastic case, different size can satisfy your different needs.

【Design】Flat washers, metric washers, metal washers are designed for electrical connections on household and commercial appliances, automotive and marine uses in which the power source has a threaded/bolt-type connection.

【Material】Black zinc plated steel, which have good corrosion resistance in bad environment like high temperature, cold weather, and high humidity areas. They have superior rust resistance and excellent oxidation resistance, which can ensure long time using.

Internal Tooth Star Lock Washers: High Quality Stainless Steel External Tooth Star Lock Washers Set of 320 pcs, includes the most commonly used 8 sizes: M2.5: 50 pcs / M3: 50 pcs / M4: 50 pcs / M5: 50 pcs / M6: 50 pcs / M8: 30 pcs / M10: 20 pcs / M12: 20 pcs.

Features: Internal Tooth Lock Washer Star exerts a spring force between the fasteners head and the substrate, which maintains the washer hard against the substrate and the bolt thread hard against the nut or substrate thread, creating more friction and resistance to rotation.

Material: Made of high-quality 304 stainless steel environmentally friendly materials, high strength (not easy to deform), wear-resistant, corrosion-resistant, rust-resistant and oxidation-resistant. All gaskets will be packaged in a sturdy clear plastic box that can be used in a storage box.

【✔】High Quality 304 Stainless Steel Internal Tooth Starlock Washers Kit

【✔】Made of 304 Stainless Steel Material, Very Good Corrosion Resistance, It Can Be Used in a Humid Environment

【✔】Set Includes 7 Most Used Sizes: M3 M4 M5 M6 M8 M10 M12【 Please See Picture 2 for Specific Dimensional Size】

♛ High Quality Stainless Steel Flat Washers and Spring Lock Washers Kit

♛ Set Includes 8 Most Used Sizes: M2 M2.5 M3 M4 M5 M6 M8 M10

♛ Made of 304 Stainless Steel Material, Very Good Corrosion Resistance, It Can Be Used in a Humid Environment.

【✔】High Quality Internal Tooth Starlock Washers Kit

【✔】Set Includes 7 Most Used Sizes: M3 M4 M5 M6 M8 M10 M12【 Please See Picture 2 for Specific Dimensional Size】

【✔】Made of 65Mn Metal Steel, Anti-corrosion and Durable

Performance, quality, trust and value

Precision, strength and dependability

Designed and built to withstand daily use in the toughest work environments

1. Product Type: High precision starlock push on locking washers

2. Product Material: High quality 65Mn steel, hard and durable

3. Package Include: 7 size of M3 M4 M5 M6 M8 M10 M12 total 280pcs in a transparent box, applicable to different sizes of fasteners

♛【Package Includes】: It contains 100pcs 8mm x 25mm large fender washers, thickness are 1.2mm. Sufficient quantities can satisfy almost all your needs in daily life and work.

♛【High Quality Material】: All the flat washers are made of high quality 304 stainless steel, which has good performance of high hardness, corrosion resistance and rust resistance even in bad environment like high temperature, cold weather, and high humidity areas, ensures long service time.

♛【Function and Use】: Flat washers are well made, with smooth and shiny surface, which are mainly used to reduce pressure and friction, prevent leakage, isolate, loosening or disperse pressure. Suitable for indoor and outdoor usage.

➤【Set Include】: 7 size of M3 M4 M5 M6 M8 M10 M12 total 260pcs in a transparent box, applicable to different sizes of fasteners

➤【 Material 】: High Quality 65Mn metal steel, anti-corrosion and durable

➤【Type】: High Quality Internal Tooth Starlock Washers Kit

HIGH QUALITY STAINLESS: These 100 Piece Lock Washers are 100% 18-8 (304) Stainless Steel which is one of the highest forms of corrosion resistant steel, making it last longer than other hardware on the market today.

WASHERS THAT YOU CAN DEPEND ON: Our hardware is very strong and is great for both indoor and outdoor use. The stainless steel is superior to regular steel and provides excellent rust resistance in water applications.

GREAT TO KEEP AROUND: Persberg hardware is great to have around for use in wood and wet environments. Persberg washers are the highest quality available on the market and we stand by our claim 100%. They are strong, corrosion resistant and will support all of your projects.

Product 1: Professional Performance: Easy-to-assemble and easy-to-start with its HONDA GX200 commercial series engine, the Aluminum Series power washer is great for contractors who specialize in deck cleaning, wood restoration, and all other professional services

Product 1: Power and Durability: A powerful, reliable, maintenance-free CAT Industrial triplex plunger pump delivers 3400 PSI at 2.5 GPM and includes thermal relief to prevent overheating

Product 1: Sturdy and Portable: The aircraft grade aluminum platform with brushed extruded aluminum tubing offers durability and corrosion resistance; 10-inch premium pneumatic tires deliver ease of maneuverability across various terrain and uneven ground

【Powerful & Professional】: Get professional-level cleaning power with the Suyncll Electric Pressure Washer. Its 1800-watt motor delivers up to 1600 PSI at 2.5 GPM, making it perfect for cleaning decks, terraces, driveways, siding, sheds, cars, and outdoor power equipment. Just be sure to empty the air from the hose before use to ensure optimal pressure.

【All-in-one Nozzle & 350 ML Foam Cannon】: Adjustable nozzle of Suyncll power washer makes pressure washing easier! Simply twisting the nozzle, you can vary the strength of the water jet from cylindrical (most intensive washing) to fan (most delicate washing) as required. Also, you can use the power washer to fire the foam cannon at your most dirt and stubbornest corners.

【Upgraded Leak-Free Connections】: The Suyncll Electric Pressure Washer features professional-grade metal garden hose connectors and a metal water outlet to prevent leaks. The metal brass adapter is sturdier than plastic and won't break from the bottom. 20ft High-Pressure Hose with metal connection for Leak-Free water delivery.

High Quality Internal Tooth Starlock Washers Kit

Set Includes 7 Most Used Sizes: M3 M4 M5 M6 M8 M10 M12,320pcs in box

Made of 65Mn metal steel, black oxide finish Anti-corrosion and durable

Washer game set includes two 12.3" x 12.3" x 3.2"H felt-lined washer targets latched together, 8 washer (4 red, 4 blue). The exterior is made of painting finish to protect against scuffs and scratches.

For all ages and skill levels(Target distance may be changed based on skill levels of players.Targets lock together for easy transport with convenient carry handle.

Sturdy wood construction with plastic coated steel washers .Quick and easy to Set up!(Comes with game rules)

Internal tooth star lock washers exert a spring force between the fasteners head and the substrate, which maintains the washer hard against the substrate, these push nuts can be used as a kind of automobile fasteners.

Package included: 200pcs 5 sizes of M2, M2.5, M3, M4, M5 locking washers in a transparent plastic case-each size 40 pieces to meet different needs.

High quality: 65Mn metal steel material, anti-corrosion and durable

☞ Material: 65Mn Steel

☞ Package: 235pcs x Starlock Washer in one storage box

☞ Main Color: Black;

→Product: Starlock Washer Assortment Kit;

→Material: 304 Stainless Steel; →Main Color: Silver;

→Package: 220pcs x Starlock Washers

【1950 PSI HIGH-PRESSURE WASHER】Rock&Rocker Electric Pressure Washer features a powerful 1500W motor, delivering up to 1950 PSI of water pressure at a flow rate of Max 1.58 GPM for maximum cleaning performance, and easily remove dirt and stains in seconds.

【SATISFIES YOUR CLEANING NEEDS】Equipped with 4 quick-connect nozzles（0°, 15°, 25°, 40°） and a 250ml soap bottle, making this powerful Electric Power Washer the ideal tool for cleaning vehicles, driveways, garage floors, concrete and tile patios, outdoor stairs and garden furniture and more.

【LEAK-PROOF DESIGN】 20lb Lightweight Small Power Washer comes with built-in O-Ring Rubber Metal Garden Hose Connector and Metal Water Outlet, tighter connection with 16.4 ft high pressure hose to avoid annoying water leaks.

【Cordless Pressure Washer Battery Powered 】 - Generates up to 750PSI for superior cleaning power.This portable power washer has a cordless, lightweight design that can be carried around, with 2x40v batteries for long run times and can clean all outdoor spaces and equipment at once.

【6-in-1 Adjustable and Rotatable Nozzles】. - This pressure washer has an upgraded nozzle with a larger spray area, with an extended lance and rotatable (180° & 360°) nozzles to clean dirt from the roof and inside the wheels. This gives the power washer up to 6 cleaning modes, 0°, 20°, 20° angle, 40°, foam spray and shower mode. Simply turn the nozzle head to adjust the water pressure to your needs, saving water and time.

【Auto and Eco Working Modes Available】 - The battery pressure washer has automatic and economic modes. You can easily switch between these 2 modes by pressing the mode button, automatic mode (high pressure) and economy mode (low pressure, for lighter cleaning tasks). In addition, our battery pressure washer has a safety lock. When the handle is locked, the cordless washer cannot be operated.

HIGH PRESSURE: 1100PSI 1.8GPM water flow, high pressure hose with explosion proof inner layer, can withstand high temperature and high pressure water flow. max. Inlet water temp.104° F (40° C). When not in use, the machine is completely stopped automatically.

QUICK CONNECT & METAL QUICK CONNECTOR: Use the quick connector to connect all accessories, easy to assemble. Double-sided metal quick connector for easy and durable use.

5 NOZZLE & SAFETY LOCK: 5 nozzles are available: 0o, 15o, 25o, 40o and soap. (There is always a nozzle suitable for your upcoming cleaning task). Soap dispenser to deeply wash any surface.The trigger gun features a safety lock. When the handle is locked, the trigger gun cannot be operated.

【CORDLESS POWER WASHER & 2X40V BATTERIES】 Easy Cleaning! upgraded version of the lightweight and compact cordless portable power washer. Cordless design can travel anywhere to do the cleaning job.Our portable power washer comes with TWO 40Volt rechargeable waterproof batteries, enough power for outdoor cleaning. You can get the cordless pressure washer quickly.

【6-IN-1 NOZZLE & ROTATABLE SPRAY NOZZLE 】Make life Easier! Our cordless power washer offers 6 different modes: 0°,20°,20°tilt direction, 40°,foam jet and shower mode for different cleaning tasks. The portable power washer also comes with an extension lance and a rotatable (180°&360°) spray nozzle for cleaning dirt on the roof and inside of the wheels.Your can not oly adjust the pressure washer by adjusting the nozzle, but also rotate the nozzle to adjust the spray angle

【MORE PRESSURE MAX 870 PSI】Our Cordless portable pressure washer can generate up to 870 PSI for superior cleaning power.The machinehas a safety lock to prevent the power washer from being opened accidentally.The machine is battery powered and has much less pressure than a plug-in pressure washer. It is ideal if you want to clean light, small cleaning tasks and use it in places where there is no power-supply. If you need more pressure and a wide range of tasks,this is not the best choice.