S-98689A244 2.1 mm ID x 4.5 mm OD General Purpose Washers

Key Features & Benefits at a Glance

• Corrosion-resistant performance with 18-8 stainless steel construction for extended service life in demanding environments.
• Precise dimensional fit with 2.1mm inner diameter and 4.5mm outer diameter ensuring reliable seating for M1.91 screws.
• Ultra-thin profile (0.2-0.4mm) ideal for space-constrained assemblies without compromising load distribution.
• RoHS 3 and REACH compliance guarantees environmental safety and unrestricted use in regulated industries.
• Consistent flat surface provides even pressure distribution to prevent fastener loosening and surface damage.
• Metric system compatibility ensures seamless integration with international engineering specifications and tooling.

Professional Applications & Engineering Value

These M1.91 metric flat washers address critical needs in precision assemblies where corrosion resistance and minimal thickness are paramount. Manufactured from 18-8 stainless steel, they prevent galvanic corrosion and maintain integrity in humid, chemical, or outdoor settings. The ultra-thin 0.2-0.4mm profile solves space limitations in compact electronics, medical devices, and miniature mechanisms, while the flat design distributes clamping force evenly to protect sensitive components and reduce stress concentrations. Ideal for industrial washers applications requiring reliable, long-term fastening in metric-based designs.

Specification Summary & Compliance

This flat washer meets standard metric dimensions with 2.1mm ID and 4.5mm OD, tailored for M1.91 screw sizes. It conforms to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety standards for industrial components.