Lock Washers
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:
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Plain (uncoated) for dry indoor environments
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Zinc-plated (Clear Cr3 or Yellow Cr6) for moderate corrosion protection
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Hot-Dip Galvanized for high-corrosion outdoor or marine environments
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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:
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Split lock washers
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Internal & external tooth lock washers
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Wedge and serrated washers
Mechanical Properties:
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Designed to provide spring tension or biting action to resist loosening
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Made to withstand repeated dynamic loads and vibrations
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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:
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Automotive assemblies
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Structural steel connections
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Appliances and electronics
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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!