S-91545A430 4.3 mm ID x 9 mm OD DIN 125 Plastic Washers

Key Features & Benefits at a Glance

• Reduced friction and wear with built-in lubricant for smoother assembly and extended service life
• Excellent corrosion resistance due to the non-metallic, lubricant-filled nylon plastic material
• Consistent performance under load ensured by a high Rockwell M75 hardness rating
• Reliable fit and function with precise 4.3mm ID and 9mm OD dimensions for M4 screws
• Broad thermal stability for applications in environments up to 220°F
• Guaranteed dimensional accuracy and interchangeability through compliance with the DIN 125 standard
• Safe for regulated industries with full compliance to RoHS 3 and REACH environmental directives

Professional Applications & Engineering Value

This M4 metric flat washer is engineered to solve common challenges in assembly and maintenance. The lubricant-filled nylon plastic construction inherently reduces galling and seizing on M4 screw threads, eliminating the need for external lubricants and speeding up production lines. Its gray color provides a neutral, professional appearance for finished products. Ideal for industrial applications in electronics, automotive, and consumer goods, this washer prevents corrosion in humid or chemically exposed environments where metal washers would fail. The combination of material durability and integrated lubrication delivers long-term reliability, reducing maintenance cycles and total cost of ownership.

Specification Summary & Compliance

This washer conforms to the DIN 125 standard for dimensional precision, ensuring a perfect fit for M4 fasteners. It is manufactured from lubricant-filled nylon plastic with a hardness of Rockwell M75. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), making it suitable for use in environmentally conscious and regulated markets.