S-93837A180 21.2 mm ID x 30.6 mm OD DIN 7980 Split Lock Washers for Socket Head Screws
Split Lock Washers for Socket Head Screws
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Basic Information
Dimension Parameters
Material & Strength Parameters
Installation & Application Parameters
Finish & Compliance Parameters
Special Type Parameters
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Key Features & Benefits at a Glance
- Superior vibration resistance prevents fastener loosening in high-stress environments, ensuring long-term assembly integrity.
- Zinc-plated steel construction provides excellent corrosion resistance, extending service life in harsh industrial conditions.
- Rockwell C44 hardness rating delivers exceptional durability and maintains locking force under heavy loads.
- Precision 4.3-4.7mm thickness ensures consistent spring action and reliable locking performance across all installations.
- DIN 7980 compliance guarantees dimensional accuracy and interchangeability with metric fastener systems.
- RoHS 3 and REACH compliance meets international environmental standards for safe use in regulated industries.
- Optimized 21.2mm ID/30.6mm OD dimensions provide perfect fit for M20 screws while maximizing contact surface area.
Professional Applications & Engineering Value
These M20 split lock washers solve critical vibration-induced loosening problems in heavy machinery, automotive assemblies, and structural steel applications. The zinc-plated steel material combined with Rockwell C44 hardness creates a spring-like action that maintains constant tension between fastened components. The split design allows the washer to bite into both the bearing surface and fastener head, creating mechanical resistance against rotational forces. This DIN 7980 compliant design ensures precise dimensional control for reliable performance in metric fastener systems, making them ideal for maintenance, manufacturing, and equipment assembly where vibration resistance is paramount.
Specification Summary & Compliance
This split lock washer features precise dimensions of 21.2mm ID x 30.6mm OD with 4.3-4.7mm thickness, manufactured to DIN 7980 standards for metric fastener compatibility. The product meets Rockwell C44 hardness requirements and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across industrial applications while maintaining consistent locking performance.
