S-91100A313 5.5 mm ID x 18 mm OD DIN 440-R Oversized Washers
Oversized Washers
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Basic Information
Dimension Parameters
Material & Strength Parameters
Installation & Application Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Enhanced corrosion resistance through zinc-plated steel construction, extending service life in humid or demanding environments
- Precise dimensional accuracy with 5.5mm ID and 18mm OD, ensuring perfect fit and alignment for M5 screws in metric assemblies
- Reliable load distribution with 1.7-2.3mm thickness, preventing surface damage and maintaining joint integrity under pressure
- Standardized compatibility per DIN 440-R specifications, guaranteeing interchangeability and simplified sourcing for European machinery
- Environmental compliance assurance meeting RoHS 3 and REACH standards, supporting sustainable manufacturing and global supply chain requirements
- Durable steel core material providing consistent mechanical strength and vibration resistance in high-stress applications
Professional Applications & Engineering Value
Engineered for industrial durability, these M5 flat washers address critical assembly challenges by combining zinc-plated steel corrosion protection with DIN 440-R precision. The 5.5mm ID ensures secure seating on M5 fasteners while the 18mm OD optimally distributes clamping forces, preventing embedment in soft materials and reducing stress concentration. This metric washer solution excels in automotive subassemblies, electrical enclosures, and machinery frames where corrosion resistance and dimensional stability are paramount. The standardized design eliminates compatibility issues in multinational projects, while the compliant surface treatment withstands industrial atmospheres without compromising electrical conductivity.
Specification Summary & Compliance
This flat washer maintains dimensional tolerances as specified in DIN 440-R standards with internal diameter of 5.5mm, external diameter of 18mm, and thickness range of 1.7-2.3mm. Manufactured from zinc-plated steel for consistent performance, the component is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental safety protocols for industrial hardware applications.
