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Lock Washers

Our knowledgeable staff are technically trained and able to work with your complex supply list to find the best solution for your industrial application. We have the in-stock inventory to stock any jobsite with bulk orders at wholesale prices, from fasteners to valves and beyond.
Plain Finish Regular Split Lock Washer
Inch Sizes Split Lock Washer Plain Finish
Hot Dipped Galvanized Split Lock Washer
Inch Sizes Split Lock Washer Galvanized Plating
Clear Zinc Cr3 Plating Regular Split Lock Washer
Inch Sizes Split Lock Washer Zinc Cr3 Plating
Inch Sizes Thru Hardened Heavy Split Lock Washer Plain Finish
Inch Sizes Thru Hardened Heavy Split Lock Washer Plain Finish
Heavy Thru Hardened Split Lock Washer Zinc Cr6
Inch Sizes Thru Hardened Heavy Split Lock Washer Zinc Cr6 Plating
Hi Collar Thru Hardened Split Lock Washer Plain Finish
Inch Sizes Hi Collar Split Lock Washer Plain Finish
Yellow Zinc Cr6 Plated Hi Collar Thru Hardened Split Lock Washer
Inch Sizes Hi Collar Split Lock Washer Zinc Cr6 Plating

Lock Washers – Secure Fastening, Superior Performance, Trusted Reliability

When it comes to preventing fastener loosening caused by vibration, torque, or thermal expansion, lock washers are your go-to solution. Engineered to deliver a mechanical locking action, these washers enhance the reliability of bolted connections across a wide range of industries—from automotive and aerospace to construction, heavy machinery, and electrical systems.

Material Options:

Lock washers are typically manufactured from carbon steel, alloy steel, stainless steel (18-8 or 316), and even brass for non-sparking or decorative uses. Material choice depends on the environment and required mechanical performance.

Finishes & Coatings:

Available finishes include:

  • Plain (uncoated) for dry indoor environments

  • Zinc-plated (Clear Cr3 or Yellow Cr6) for moderate corrosion protection

  • Hot-Dip Galvanized for high-corrosion outdoor or marine environments

  • Phosphate & Oil for military-grade or precision assemblies

Dimensions & Tolerances:

Lock washers come in standard sizes to match common bolt diameters, with tight inner and outer diameter tolerances to ensure proper seating and clamping pressure. Popular types include:

  • Split lock washers

  • Internal & external tooth lock washers

  • Wedge and serrated washers

Mechanical Properties:

  • Designed to provide spring tension or biting action to resist loosening

  • Made to withstand repeated dynamic loads and vibrations

  • Hardened variants are available for use with high-strength fasteners (Grades 5, 8, 10.9, etc.)

Standard Compliance:

Manufactured to meet ASME B18.21.1, DIN 127, DIN 6798, or MIL-specs depending on washer type and application.

Applications:

  • Automotive assemblies

  • Structural steel connections

  • Appliances and electronics

  • Aerospace and defense systems

For critical fastening systems where staying tight is non-negotiable, lock washers offer peace of mind and proven performance. Need help choosing the right type for your project? Our fastener specialists are ready to assist!

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