S-93785A825 0.469" ID x 1.25" OD ASME B18.21.1 Plastic Washers

Key Features & Benefits at a Glance

• Exceptional Thermal Stability: Maintains structural integrity and performance in continuous service from -20°F to 500°F, ideal for high-temperature industrial environments.
• Superior Chemical Resistance: Made from PEEK plastic, it resists a wide range of harsh chemicals, reducing degradation and extending service life.
• High Hardness & Durability: With a Rockwell M103 hardness, it provides excellent resistance to deformation under load, ensuring reliable, long-term performance.
• Precision Fit & Vibration Resistance: Designed for a 7/16" screw with precise 1.25" OD and 0.469" ID dimensions, offering a secure fit that helps prevent loosening.
• Compliance & Safety Assurance: Conforms to ASME B18.21.1 specifications and is RoHS 3 & REACH compliant, meeting stringent industrial safety and environmental standards.
• Dimensional Stability: Provides consistent performance with minimal swelling or warping, crucial for maintaining assembly tolerances.
• Lightweight & Non-Corrosive: As a plastic component, it reduces overall weight and eliminates galvanic corrosion risks when used with dissimilar metals.

Professional Applications & Engineering Value

This PEEK plastic flat washer is engineered to solve critical challenges in demanding sectors like aerospace, chemical processing, and electronics. Its high-temperature resistance up to 500°F ensures reliable performance in engine compartments or near heat sources where metal washers might fail. The inherent chemical resistance of PEEK makes it indispensable in corrosive environments, protecting assemblies from aggressive fluids and gases. Its dimensional stability and Rockwell M103 hardness prevent compression set and maintain clamp load, which is vital for vibration-prone applications. By specifying this ASME B18.21.1 compliant washer for your 7/16" screw assemblies, you gain a durable, lightweight, and compliant solution that enhances the longevity and safety of your industrial equipment.

Specification Summary & Compliance

This flat washer conforms to the dimensional requirements of the ASME B18.21.1 standard. It features an OD of 1.25", an ID of 0.469", and a thickness ranging from 0.064" to 0.104", designed for use with a 7/16" screw. The material is PEEK plastic with a Rockwell M103 hardness. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free of hazardous substances and safe for industrial use.