S-91434A116 0.281" ID x 0.625" OD ASME B18.21.1 SAE Washers

Key Features & Benefits at a Glance

• Exceptional strength and durability with Grade 8 classification and Rockwell C38 hardness, ensuring reliable performance under high-stress conditions.
• Superior corrosion resistance provided by the black corrosion-resistant coated steel, extending service life in harsh industrial environments.
• Precise dimensional fit with 0.281" ID and 0.625" OD, designed for accurate alignment and secure fastening with 1/4" screws.
• Consistent load distribution due to the flat washer design and controlled thickness (0.055-0.065"), reducing surface pressure and preventing joint failure.
• Compliance with rigorous standards including ASME B18.21.1, ensuring interchangeability and quality in mechanical assemblies.
• Environmentally responsible manufacturing with RoHS 3 and REACH compliance, meeting global regulatory requirements for safe use.
• Versatile industrial application as an SAE inch-system washer, suitable for automotive, machinery, and construction fastening needs.

Professional Applications & Engineering Value

This Grade 8 SAE flat washer is engineered to address critical challenges in heavy-duty industrial settings, where corrosion resistance and structural integrity are paramount. Made from black corrosion-resistant coated steel, it effectively combats rust and degradation in exposed or high-moisture environments, such as outdoor machinery, automotive assemblies, and construction equipment. The precise 1/4" screw size compatibility and flat design ensure even load distribution, minimizing stress concentrations that can lead to bolt loosening or material fatigue. By adhering to ASME B18.21.1 standards, this washer guarantees dimensional accuracy and reliability, reducing downtime and maintenance costs in applications demanding superior fastener performance and longevity.

Specification Summary & Compliance

This washer features an inner diameter of 0.281", outer diameter of 0.625", and thickness range of 0.055-0.065", designed for use with 1/4" screws in inch-based systems. It complies with ASME B18.21.1 for dimensional and mechanical requirements, ensuring precise fit and function. The product is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its adherence to environmental and safety standards without restricted substances.