S-99872A116 0.505" ID x 0.75" OD Plastic Washers

Key Features & Benefits at a Glance

• Enhanced durability with glass-filled nylon construction that withstands mechanical stress and extends service life
• Superior chemical resistance for reliable performance in corrosive environments without degradation
• High-temperature stability maintaining integrity from -20°F to 230°F for demanding thermal applications
• Excellent hardness rating (Rockwell M96) providing consistent load distribution and vibration resistance
• Precise dimensional fit with 0.505" ID and 0.75" OD ensuring proper alignment with 1/2" fasteners
• Regulatory compliance meeting RoHS 3 and REACH standards for safe use in regulated industries
• Lightweight electrical insulation with nylon material preventing galvanic corrosion in electrical assemblies

Professional Applications & Engineering Value

Engineered for challenging industrial environments, these glass-filled nylon flat washers deliver critical protection against chemical exposure and thermal cycling. The glass reinforcement significantly enhances structural integrity compared to standard nylon, preventing deformation under sustained loads while maintaining excellent dielectric properties. This makes them ideal for electrical enclosures, chemical processing equipment, and outdoor applications where metal washers would corrode or conduct electricity. The temperature resistance from -20°F to 230°F ensures reliable sealing and spacing functions in both freezing conditions and elevated temperature operations. Their chemical resistance protects against oils, solvents, and mild acids, extending maintenance intervals in aggressive environments.

Specification Summary & Compliance

This flat washer features precise inch system dimensions with 0.505" internal diameter and 0.75" outer diameter, designed specifically for 1/2" screw sizes. The thickness tolerance of 0.057-0.067" ensures consistent performance in assembly applications. Manufactured from glass-filled nylon plastic with Rockwell M96 hardness rating, these washers comply with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, making them suitable for use in regulated industries including electronics, automotive, and food processing equipment where material compliance is mandatory.