S-90132A120 0.141" ID x 0.312" OD Plastic Washers

Key Features & Benefits at a Glance

• Superior electrical insulation properties from hard fiber material, ideal for preventing current leakage in electrical assemblies
• Excellent corrosion and chemical resistance for long-lasting performance in harsh industrial environments without rusting
• High-temperature resilience up to 230°F ensures reliable sealing and load distribution under thermal stress
• Consistent dimensional stability with precise 0.312" OD and 0.141" ID for secure fit on No. 5 screws, reducing assembly errors
• Enhanced durability with Rockwell R80 hardness providing reliable wear resistance and extended service life
• Compliance with RoHS 3 and REACH regulations guarantees safe, environmentally responsible use in global markets
• Optimal thickness range (0.036-0.044") allows for effective vibration damping and even pressure distribution

Professional Applications & Engineering Value

This hard fiber flat washer is engineered to address common industrial challenges such as electrical short-circuiting, corrosion-induced failures, and thermal degradation. Its black hard fiber construction delivers exceptional electrical insulation, making it indispensable in electrical enclosures, control panels, and automotive electronics where safety is paramount. The material's inherent resistance to oils, solvents, and moisture prevents swelling or weakening, ensuring consistent performance in high-temperature applications up to 230°F. By maintaining dimensional accuracy (0.312" OD, 0.141" ID) for No. 5 screws, it simplifies assembly while providing reliable load distribution and vibration isolation, reducing maintenance needs in industrial machinery, HVAC systems, and plumbing fixtures.

Specification Summary & Compliance

This flat washer adheres to inch system measurements with an outer diameter of 0.312", inner diameter of 0.141", and thickness tolerance of 0.036-0.044". It is manufactured to precise dimensional standards for compatibility with No. 5 screw sizes and features a Rockwell R80 hardness rating for consistent mechanical performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets stringent environmental and safety requirements for industrial and electrical applications.