S-95611A121 21 mm ID x 37 mm OD Plastic Washers

Key Features & Benefits at a Glance

• Excellent corrosion and chemical resistance from PVC plastic material, ideal for harsh industrial environments.
• Reliable electrical insulation properties for safety in electrical assemblies and components.
• Durable construction with Rockwell R115 hardness ensures long service life and resistance to deformation under load.
• Precise metric sizing (21mm ID, 37mm OD) guarantees a perfect fit for M20 screws, preventing loosening and misalignment.
• Wide operating temperature range up to 140°F (60°C) for stable performance in various application conditions.
• Full compliance with RoHS 3 and REACH regulations ensures environmental safety and unrestricted use in regulated markets.
• Cost-effective alternative to metal washers, reducing overall assembly weight and preventing galvanic corrosion.

Professional Applications & Engineering Value

This M20 PVC plastic flat washer is engineered to solve critical challenges in industrial and engineering applications. Its PVC plastic composition provides inherent resistance to a wide range of chemicals, acids, and alkalis, making it indispensable in chemical processing, water treatment, and marine environments. The gray color and flat washer design offer reliable performance as a seal, spacer, and load distributor, particularly where electrical insulation is paramount to prevent short circuits. By specifying this metric flat washer, engineers can effectively combat corrosion, reduce maintenance frequency, and ensure assembly integrity in industrial applications from machinery to electrical enclosures, all while meeting stringent environmental standards.

Specification Summary & Compliance

This washer conforms to standard metric flat washer dimensional expectations with an Inside Diameter (ID) of 21 mm, Outside Diameter (OD) of 37 mm, and a Thickness of 2.8-3.5 mm, designed specifically for M20 screw size. The material is characterized by a Rockwell R115 hardness. It is manufactured to be fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free of restricted hazardous substances and safe for industrial and commercial use.