S-91434A122 0.656" ID x 1.313" OD ASME B18.21.1 SAE Washers

Key Features & Benefits at a Glance

• Exceptional load distribution with 1.313" OD and 0.656" ID to prevent surface damage and joint loosening under high stress
• Superior corrosion resistance from black-coated steel, ensuring longevity in harsh industrial environments
• High-strength performance with Grade 8 classification and Rockwell C38 hardness for reliable use in heavy machinery
• Precise dimensional stability with 0.122-0.138" thickness, maintaining consistent pressure distribution for 5/8" screws
• Compliance with ASME B18.21.1 standards, guaranteeing interchangeability and engineering reliability
• Environmental and safety adherence through RoHS 3 and REACH compliance, supporting sustainable procurement
• Durable mechanical properties ideal for repetitive disassembly and vibration-prone applications

Professional Applications & Engineering Value

Engineered for demanding industrial settings, this Grade 8 SAE flat washer delivers critical performance where vibration resistance and load-bearing capacity are paramount. The black corrosion-resistant coated steel construction mitigates rust and degradation in outdoor or chemically exposed environments, such as construction equipment, automotive assemblies, and heavy-duty machinery. Its precise inch-system dimensions (0.656" ID and 1.313" OD) ensure optimal fit for 5/8" screw applications, distributing clamp load effectively to prevent bolt fatigue and material embedment. By adhering to ASME B18.21.1, it provides standardized reliability, reducing installation errors and maintenance costs in mechanical fastening systems.

Specification Summary & Compliance

This washer conforms to ASME B18.21.1 dimensional and material specifications, with an inner diameter of 0.656", outer diameter of 1.313", and thickness ranging from 0.122" to 0.138". It meets Grade 8 strength requirements and features a hardness of Rockwell C38 for consistent performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free of restricted substances and safe for industrial use.