S-90295A233 0.125" ID x 0.438" OD ASME B18.22.1 Plastic Washers

Key Features & Benefits at a Glance

• Superior corrosion and chemical resistance thanks to high-quality nylon plastic construction, ideal for harsh industrial environments.
• Excellent electrical insulation properties to prevent galvanic corrosion and ensure safe operation in electrical assemblies.
• Wide operating temperature range from -40°F to 300°F, maintaining performance and dimensional stability in extreme conditions.
• Consistent load distribution and vibration resistance with precise 0.125" ID and 0.438" OD dimensions, protecting No. 4 screw assemblies from loosening.
• Durable and non-marring surface with a Rockwell R115 hardness, preventing damage to sensitive components while ensuring long service life.
• Guaranteed material safety and compliance with RoHS 3 and REACH regulations, making it suitable for global markets and sensitive applications.
• Reliable dimensional accuracy and interchangeability by conforming to the ASME B18.22.1 standard, ensuring a perfect fit and simplified procurement.

Professional Applications & Engineering Value

This nylon plastic flat washer is engineered to solve critical challenges in industrial assembly where metal fasteners are unsuitable. Its inherent chemical resistance makes it perfect for applications exposed to solvents, oils, and moisture, preventing the degradation common with metallic washers. The electrical insulation property is vital in electrical enclosures and electronic devices, eliminating the risk of short circuits. Designed for a No. 4 screw size, it provides a reliable, non-conductive, and non-abrasive barrier in precision equipment, automotive components, and consumer appliances. The green color allows for easy part identification and inventory management, streamlining the assembly process in high-volume production environments.

Specification Summary & Compliance

This washer features an Inside Diameter (ID) of 0.125", Outside Diameter (OD) of 0.438", and a Thickness of 0.036-0.045". It is manufactured to meet the dimensional standards of ASME B18.22.1. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances. The material, Nylon Plastic, provides a Rockwell hardness of R115 and is suitable for use within a temperature range of -40°F to 300°F.