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Lock washers are essential components for preventing fasteners from loosening due to vibration or thermal expansion. Choosing the correct type and size ensures the integrity and safety of your assemblies. Understanding the nuances of different lock washer designs will help you make an informed decision for your specific application, guaranteeing a secure and reliable connection.
Spring Lock Washers: The sae spring lock washers assortment kit contains 9 sizes 910 pcs, which are #4(200 pcs) #6(200 pcs) #8(200 pcs) #10(130pcs) #12(80 pcs) 1/4"(44 pcs) 5/16"(36 pcs) 3/8"(14 pcs) 1/2"(6 pcs), 9 different sizes of lock washers from...
304 Stainless Steel: 304 Stainless steel split lock washer are made of high-strength materials with good corrosion resistance and long service life. Compared to galvanised materials, the oxidation resistance, corrosion resistance and rust resistance are...
Split Lock Washer Function: Split washer are mainly used for nuts, bolts and screws from rotating and loosening due to vibration and friction, and play a role in preventing loosening and fixing objects to ensure the stability of machines
Convenient Storage: Each of the 9 different sizes of spring lock washers are individually stowed by type in an easy to carry clear case. Easy to store and use,so that the rivnut will not be lost or mixed up during use
Wide Application: Spring washers are highly compatible with screws, nuts and bolts of the same size and can be used to connect moving parts or to prevent loose connections, such as in furniture repair, outdoor construction, and electrical maintenance
Spring Lock Washers: The metric spring lock washers assortment kit contains 9 sizes 1000 pcs, which are m2(200 pcs),m2.5(200 pcs),m3(200 pcs),m4(180 pcs),m5(80 pcs),m6(60 pcs),m8(50 pcs),m10(20 pcs),m12(10 pcs) ,9 different sizes of lock washers From...
304 Stainless Steel: 304 Stainless steel split lock washer are made of high-strength materials with good corrosion resistance and long service life. Compared to galvanised materials, the oxidation resistance, corrosion resistance and rust resistance are...
Split Lock Washer Function: Split washer are mainly used for nuts, bolts and screws from rotating and loosening due to vibration and friction, and play a role in preventing loosening and fixing objects to ensure the stability of machines
Convenient Storage: Each of the 9 different sizes of spring lock washers are individually stowed by type in an easy to carry clear case.Easy to store and use,so that the spring lock washers will not be lost or mixed up during use
Wide Application: Spring washers are highly compatible with screws, nuts and bolts of the same size and can be used to connect moving parts or to prevent loose connections, such as in furniture repair, outdoor construction, and electrical maintenance
Spring Lock Washer Assortment Kit: SAE spring lock washer set includes 1000 pieces in 9 different sizes (#4, #6, #8, #10, #12, 1/4", 5/16", 3/8", 1/2"), covering a wide range of fastening needs for both daily and professional use
304 Stainless Steel Material: These split lock washers are made of high-quality 304 stainless steel, which has excellent strength, rust resistance, and long-term durability. Ideal for indoor and outdoor use, they can maintain reliable performance even in...
Split Lock Washer Function: Split lock washers use spring tension to prevent nuts and bolts from loosening due to vibration or impact, ensuring a firm hold and stable operation of your equipment
Wide Application: Spring washers are designed to be highly compatible with standard-sized screws, nuts, and bolts, providing reliable fastening in harsh environments. Ideal for mechanical assembly, furniture repair, outdoor construction, electrical...
Convenient Storage: Spring lock washers come sorted in a clear, labeled storage box for quick access and easy organization, helping you avoid loss or mix-ups during use
Speed Locking Washers Size: Speed locking washers assortment kit contains 8 size types of washers, which are m2.5-8(100pcs),m3-9(100pcs),m4-12(70pcs),m5-14(60pcs),m6-16(60pcs),m8-18(50pcs),m10-20(30pcs),m12-25(30pcs),8 different sizes to meet different...
Steel Star Locking Washer: The push nuts assortment are made of high quality carbon steel material, which has high strength and can withstand certain loads and impacts, and can ensure the stability and working life of the star locking washer
Star Locking Washer Function: The starlock washers are one of the indispensable elements in most mechanical equipment, it has a variety of roles in fixing, supporting and damping. It uses spring pressure to regulate reinforced shaped objects and is used...
Wide Application: internal tooth lock washer is widely used in various fields, especially in machinery manufacturing, automobile manufacturing, shipbuilding, aerospace, rail transport and so on
Convenient Storage: Each of the 8 different sizes of push on locking washer are individually stowed by type in an easy to carry clear case. Easy to store and use, so that the star locking washer will not be lost or mixed up during use
Spring Lock Washers: The metric sae spring lock washers assortment kit contains 18 sizes 1780 pcs, which are M2(200 pcs),M2.5(200 pcs),M3(200 pcs),M4(180 pcs),M5(100 pcs),M6(100 pcs),M8(80 pcs),M10(40 pcs),M12(20 pcs) #4(100pcs) #6(100 pcs) #8(100 pcs...
304 Stainless Steel: 304 Stainless steel split lock washer are made of high-strength materials with good corrosion resistance and long service life. Compared to galvanised materials, the oxidation resistance, corrosion resistance and rust resistance are...
Split Lock Washer Function: Split washer are mainly used for nuts, bolts and screws from rotating and loosening due to vibration and friction, and play a role in preventing loosening and fixing objects to ensure the stability of machines
Convenient Storage: Each of the 18 different sizes of spring lock washers are individually stowed by type in an easy to carry clear case. Easy to store and use, so that the rivnut will not be lost or mixed up during use
Wide Application: Spring washers are highly compatible with screws, nuts and bolts of the same size and can be used to connect moving parts or to prevent loose connections, such as in furniture repair, outdoor construction, and electrical maintenance
External Tooth Lock Washers Material: Made of 304 stainless steel, with good corrosion resistance and long service life. Compared with galvanized materials, it has stronger oxidation resistance, corrosion resistance and rust resistance, and the service...
Widely used: the internal star washers is matched with the same type of screws, nuts and bolts, which can be used to connect moving parts or prevent loose connection, such as shock absorption and insulation in furniture maintenance, outdoor construction...
550pcs internal lock washers is packed in a transparent box, with clear model classification, easy carrying and convenient storage, and the box can be reused.
550pcs internal lock washers is packed in a transparent box, with clear model classification, easy carrying and convenient storage, and the box can be reused.
Spring Lock Washers Assortment Kit Includes Nine Sizes With 1000 Pieces Total Covering M2 To M12 Offering Versatile Solutions For Various Repair And Construction Needs
304 Stainless Steel Material Ensures High Strength Corrosion Resistance And Long Service Life Compared To Standard Galvanized Washers Ensuring Durable Performance
Metric Split Lock Washer Set Prevents Nuts Bolts And Screws From Loosening Due To Vibration Or Movement Maintaining Secure Fixtures In Machinery And Furniture
Clear Portable Case Organizes All Sizes Separately For Easy Storage And Quick Access Preventing Loss Or Mixing Of Spring Lock Washers During Projects
Wide Compatibility Of Spring Lock Washers Assortment Kit Works With Screws Bolts And Nuts Of Matching Sizes Ideal For DIY Furniture Repair Electrical Maintenance And Outdoor Construction
SPLIT LOCK WASHERS FOR SECURE FASTENER CONNECTIONS: 1/4 in. zinc-plated split lock washers maintain tight bolt, nut, and screw connections, helping prevent fasteners from loosening in mechanical, construction, and repair applications.
SPLIT RING DESIGN PREVENTS VIBRATION LOOSENING: Split design compresses when tightened, creating spring tension between the fastener and material surface to reduce loosening from vibration, movement, or repeated mechanical stress.
PART OF A COMPLETE FASTENING SYSTEM: Use with bolts and nuts of the same size to strengthen assemblies and maintain consistent clamping pressure, preventing fasteners from backing out over time in equipment and structural installations.
ZINC-PLATED STEEL FOR CORROSION RESISTANCE: Durable steel with zinc-plated coating provides moderate rust protection for general-purpose indoor use and light outdoor environments. 100-piece pack for project supply needs.
TRUSTED HILLMAN FASTENING SOLUTIONS: Hillman hardware products are engineered for consistent quality, dependable performance, and reliable fastening across construction, repair, and home improvement project applications.
Last update on 2026-08-31 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Lock Washers
Types of Lock Washers
Split Lock Washers: These are the most common type, featuring a split in their circular shape. When compressed, the split ends dig into the bearing surfaces of both the fastener and the work surface, creating friction to resist loosening. They are versatile and suitable for a wide range of applications.
Tooth Lock Washers: Available in internal, external, and countersunk tooth designs, these washers have teeth that extend inward or outward to bite into the fastener head or the mating surface. They provide a strong locking action, especially in applications with significant vibration. External tooth washers are good for wider bearing surfaces, while internal tooth washers fit snugly around bolt heads.
Nord-Lock Washers: A more advanced locking system, Nord-Lock washers consist of two matched washers with cams on one side and radial ribs on the other. When tightened, the cams move against each other, creating a tension that prevents loosening. They are highly effective in preventing vibration-induced loosening and are often used in critical infrastructure and heavy machinery.
Material Considerations
Lock washers are available in various materials, each offering different strengths and corrosion resistance. Common materials include zinc-plated steel for general use, stainless steel for corrosion resistance in outdoor or wet environments, and brass for non-sparking applications. Consider the environmental conditions and the load requirements of your project when selecting a material.
Size and Fit
The size of a lock washer is determined by the fastener it will be used with. It's crucial to select a washer that matches the nominal diameter of the bolt or screw. For split and tooth lock washers, ensure the inner diameter is slightly smaller than the bolt diameter to allow for a snug fit.
Frequently Asked Questions
What is the primary function of a lock washer?
The primary function of a lock washer is to prevent fasteners, such as bolts and nuts, from loosening. They achieve this by creating friction between the fastener and the bearing surface, resisting rotational movement caused by vibration or thermal changes.
Are split lock washers effective in all situations?
Split lock washers are effective in many common applications, especially those with moderate vibration. However, for extremely high vibration or critical load applications, more robust solutions like Nord-Lock washers might be necessary.
How do I determine the correct size lock washer?
The size of a lock washer is designated by the size of the bolt or screw it is intended to be used with. Always match the washer's nominal size to the fastener's diameter to ensure a proper fit and effective locking action.
Can I reuse lock washers?
While some lock washers can be reused, their effectiveness may diminish with each use, particularly split lock washers which can deform. For critical applications where reliability is paramount, it's often recommended to use new washers.
What is the difference between internal and external tooth lock washers?
External tooth lock washers have teeth that extend outward to grip the surface of the material being fastened, while internal tooth lock washers have teeth that grip the underside of the bolt or nut head. External teeth are better for wider bearing surfaces, while internal teeth provide a tighter fit around the fastener.
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