Lock Washers

Types of Lock Washers We Offer

Split Lock Washer Regular Plain

Regular plain split lock washers are designed to prevent loosening by biting into the mating surface as the fastener is tightened. Without coating, they are best suited for indoor or covered applications where moisture is minimal. Contractors rely on them for assembly and repair work where vibration resistance is required but corrosion protection is not a priority. Their simple design makes them a cost-effective choice for everyday fastening.

Split Lock Washer Regular Zinc Cr+3

Zinc Cr+3 regular split lock washers provide the same locking action as plain washers with added corrosion resistance. The bright zinc finish also enhances appearance, making them suitable for commercial and light industrial applications. They are widely used in projects where both durability and a clean look are required. Installers prefer them for reliable performance at a practical cost.

Split Lock Washer Regular Alloy Thru Hardened Zinc Yellow Cr+6

These thru hardened alloy split lock washers finished in zinc yellow Cr+6 combine superior strength with enhanced corrosion protection. The golden coating provides long service life and easy identification on the job site. Contractors use them in heavy-duty applications where vibration resistance and visibility are important. Their durability makes them a go-to choice for demanding mechanical and structural projects.

Split Lock Washer Regular Zinc Yellow Cr+6

Regular split lock washers with zinc yellow Cr+6 finish provide improved protection over clear zinc while also offering a bright golden color. This finish makes them easy to spot and ensures longer resistance to rust. They are used in commercial and industrial jobs where added protection and quick identification are valuable. Builders rely on them for projects requiring durability under vibration.

Split Lock Washer Regular HDG

Hot-dip galvanized split lock washers are designed for outdoor or exposed environments where corrosion protection is critical. The thick zinc coating ensures long-lasting durability even under harsh weather conditions. Contractors use HDG washers for structural and heavy-duty installations where vibration resistance and rust prevention are both essential. They are commonly specified for infrastructure and outdoor assemblies.

External Tooth Lock Washer Plain

Plain external tooth lock washers feature serrated edges that bite into the surface to prevent loosening. Without coatings, they are best for indoor applications not exposed to moisture. Contractors use them in assemblies where strong locking action is needed but corrosion protection is unnecessary. Their cost efficiency and performance make them a staple in general fastening.

External Tooth Lock Washer Zinc Cr+3

External tooth lock washers with a zinc Cr+3 finish provide dependable locking action with added corrosion resistance. The bright finish enhances durability and gives a professional look. They are often chosen for commercial and light industrial projects where long-lasting connections are important. Installers appreciate their combination of strength and clean appearance.

Internal Tooth Lock Washer Plain

Plain internal tooth lock washers grip the fastener from the inside edge, preventing loosening under vibration. They are designed for indoor or protected applications where corrosion is not a concern. Contractors use them for small fasteners or assemblies that require secure holding power. Their compact design makes them effective in tight spaces.

Internal Tooth Lock Washer Zinc Cr+3

Zinc Cr+3 internal tooth lock washers combine the bite of internal teeth with protection against rust and wear. The coating extends service life and maintains appearance in commercial and industrial environments. They are widely used where reliable fastening is required under vibration. Contractors prefer them for projects demanding both durability and moderate corrosion resistance.

Internal/External Tooth Lock Washer Zinc Cr+3

These lock washers combine both internal and external teeth for maximum holding power. With a zinc Cr+3 finish, they are resistant to corrosion while offering aggressive locking action. They are used in demanding applications where fasteners must remain secure under stress and vibration. Contractors select them when both strength and protection are priorities.

Metric Split Lock Washer Thru Hardened DIN 127B Plain

Metric thru hardened split lock washers in plain finish are built for strength and vibration resistance. Without additional coating, they are best for indoor or controlled environments. Contractors use them in metric assemblies requiring dependable load control. Their durability ensures performance in structural and mechanical applications.

Metric Split Lock Washer DIN 127B Zinc Yellow Cr+6

These metric split lock washers feature zinc yellow Cr+6 finish for superior corrosion resistance and high visibility. The golden coating allows quick identification and extends service life. They are used in metric construction and machinery where vibration resistance and durability are required. Builders rely on them for projects that demand long-term reliability.

Metric External Tooth Lock Washer DIN 6797A Zinc Cr+3

Metric external tooth washers with zinc Cr+3 finish provide secure locking action with added corrosion resistance. The external teeth bite firmly into the surface, keeping fasteners tight under stress. They are widely used in metric systems across industrial and commercial applications. Contractors appreciate their blend of strength and protection.

Metric External Tooth Serrated Lock Washer DIN 6798A Zinc Cr+3

These serrated metric external tooth washers feature aggressive teeth that grip tightly to prevent loosening. Finished with zinc Cr+3, they resist rust while maintaining durability. They are chosen for heavy-duty metric applications where strong locking power is essential. Builders specify them in environments subject to vibration and wear.

Metric Internal Tooth Lock Washer DIN 6797J Zinc Cr+3

Metric internal tooth washers with zinc Cr+3 finish deliver compact, secure locking action and corrosion protection. They are ideal for smaller fasteners and confined spaces. Contractors use them in metric assemblies where vibration resistance is required. Their durability ensures reliability across industrial projects.

Split Lock Washer Hi Collar Thru Hardened Plain

Hi collar split lock washers provide additional thickness for greater holding power. In plain finish, they are intended for indoor or protected applications. Contractors use them in structural and mechanical jobs requiring stronger resistance to loosening. Their thru hardened build ensures long service life under stress.

Split Lock Washer Hi Collar Thru Hardened Zinc Yellow Cr+6

These hi collar washers are thru hardened for strength and finished in zinc yellow Cr+6 for corrosion protection and visibility. They deliver enhanced durability and are easy to identify on job sites. Contractors choose them for demanding installations where vibration resistance and longevity are critical. Their design makes them ideal for heavy-duty fastening.

USA Split Lock Washer Regular Heat Treated Plain

USA-made heat treated plain split lock washers offer durability and compliance with domestic sourcing requirements. Without coatings, they are suited for protected applications. Contractors specify them when USA origin is required for government or infrastructure projects. Their heat-treated construction ensures consistent performance under load.

Split Lock Washer Heavy Thru Hardened Plain

Heavy thru hardened split lock washers are built to withstand greater loads and stresses. In plain finish, they are best used indoors or in dry environments. Contractors select them for structural assemblies that demand high strength. Their robust build provides assurance in critical applications.

Split Lock Washer Regular Alloy Plain

Regular alloy plain split lock washers provide improved strength compared to standard versions. With no coating, they are intended for indoor use or non-corrosive settings. Contractors use them in mechanical and structural applications that require dependable performance. Their alloy build ensures added toughness under vibration.

Metric Split Lock Washer Thru Hardened DIN 127B Zinc Blue Cr+3

These metric split lock washers are thru hardened for strength and finished with zinc blue Cr+3. The coating provides corrosion resistance while adding a distinctive blue tint for easy identification. Contractors use them in industrial applications where both durability and visual differentiation are needed. Their combination of strength and finish makes them versatile.

Metric Hi Collar Lock Washer DIN 7980 Plain

Metric hi collar washers in plain finish provide added thickness for greater locking action. They are commonly used in metric assemblies where heavy loads are applied. Without coatings, they are best suited for indoor environments. Contractors rely on them for structural and industrial fastening.

Metric Hi Collar Lock Washer DIN 7980 Zinc Cr+3

These metric hi collar washers combine the added strength of hi collar design with a zinc Cr+3 protective coating. They resist corrosion while providing enhanced holding power under vibration. Contractors choose them for demanding metric applications requiring durability and performance. Their finish ensures reliability in commercial and industrial projects.

Metric Curved Spring Washer DIN 137A Plain

Metric curved spring washers are designed to maintain tension in bolted joints. In plain finish, they are best for indoor or controlled environments. Contractors use them in metric assemblies requiring flexibility and load compensation. Their curved shape provides consistent spring action to keep connections tight.

Metric Wave Spring Washer DIN 137B Plain

Wave spring washers feature a wavy profile that delivers tension and flexibility in fastened joints. The plain finish makes them suited for indoor use or non-corrosive settings. They are used in metric assemblies that require continuous pressure to maintain joint integrity. Contractors rely on them for precision fastening applications.

Material Options

South Coast Fasteners stocks lock washers in a variety of materials that provide dependable strength, durability, and the right balance of toughness and cost for different applications.

Steel

Standard steel lock washers are built for everyday fastening jobs. They provide solid holding power and are a practical choice for general construction, maintenance, and repair work. Their strength and affordability make them one of the most commonly used options in both professional and DIY applications.

Medium Carbon Steel

Medium carbon steel lock washers deliver more toughness than standard steel, while still being cost-effective. Heat-treated for strength, they are reliable for assemblies that experience frequent use or moderate vibration. Contractors often choose medium carbon steel washers for general-duty mechanical and industrial fastening where consistent performance is needed without driving up costs.

Alloy Steel

Alloy steel lock washers are engineered for higher performance. By incorporating alloying elements, these washers achieve greater tensile strength and durability, making them a trusted choice in heavy machinery, automotive applications, and demanding mechanical systems. They resist wear and deformation under stress, keeping connections stable even in high-vibration environments.

Through Hardened

Through-hardened lock washers undergo a heat-treatment process that hardens the material throughout, not just on the surface. This makes them far more resistant to crushing and deformation under heavy loads. They’re often specified for structural steel assemblies, industrial machinery, and construction jobs where failure is not an option.

Through Hardened Alloy

Through-hardened alloy steel lock washers combine the benefits of alloy strength with the toughness of complete heat treatment. These washers are designed for critical-use applications such as aerospace, defense, or heavy transport systems where vibration, stress, and safety standards are extreme. Their ability to maintain grip and shape under punishing conditions makes them the premium choice for high-stakes fastening.

Available Finishes

South Coast Fasteners offers lock washers in finishes that provide protection against corrosion, ensure compatibility with surrounding materials, and make identification on the job simple.

Hot Dip Galvanize

Hot dip galvanized lock washers are coated with a thick layer of zinc that provides long-term resistance against rust and corrosion. This makes them an excellent choice for outdoor projects, marine environments, or infrastructure exposed to constant weathering. Builders rely on them for durability in environments where untreated steel would quickly fail.

Plain

Plain finish lock washers are uncoated and offer a raw steel surface. They are a cost-effective choice for indoor assemblies where corrosion resistance isn’t necessary, and they’re also commonly used when welding or painting after installation. Their simplicity keeps them adaptable and economical.

Yellow Zinc Cr+6

Yellow zinc Cr+6 adds a golden chromate layer over zinc plating, combining corrosion protection with easy visibility. These washers are often selected for automotive, electrical, or mechanical installations where quick identification and durability are both important. The bright finish also adds a professional appearance to exposed connections.

Zinc

Zinc-plated lock washers provide a clean, silver finish that offers reliable rust protection for everyday use. This general-purpose coating is suitable for indoor or light outdoor applications, making it a popular choice in construction, maintenance, and repair. It strikes a balance between cost and performance for common fastening needs.

Zinc Cr+3

Zinc Cr+3 uses a modern trivalent coating process that delivers strong corrosion resistance while complying with environmental standards. The finish provides a bright, clear appearance and is widely accepted in industrial, construction, and commercial projects where reliability and compliance both matter.

Why Choose South Coast Fasteners?

South Coast Fasteners carries lock washers in the materials and finishes professionals rely on to keep assemblies tight and secure. From everyday jobs to high-vibration or high-load applications, we provide the right balance of strength, durability, and finish options. Backed by knowledgeable service and dependable stock, we make sure you get the washers you need without delays or second-guessing.

Order Lock Washers Online Today

South Coast Fasteners makes it easy to order lock washers online in the material and finish your job calls for. Whether you’re securing heavy equipment, assembling structural steel, or tackling a repair project, our team is here to help with sizing, specs, or bulk orders. With us, you’ll always have fasteners that hold strong and keep your work moving.