S-91118A116 0.322" ID x 0.583" OD ASME B18.21.1 Split Lock Washers

Key Features & Benefits at a Glance

• Exceptional corrosion resistance in harsh environments due to K500 Nickel construction, extending service life and reducing replacement frequency.
• Reliable spring tension and locking action from the standard split design, preventing fastener loosening under vibration and thermal cycling.
• Precise dimensional fit with a 0.322" ID and 0.583" OD, ensuring compatibility and secure fastening on 5/16" screws.
• Guaranteed mechanical performance and interchangeability, manufactured in compliance with the ASME B18.21.1 standard.
• Enhanced operational safety and environmental responsibility, being fully RoHS 3 and REACH compliant for use in regulated industries.
• Versatile industrial application across various sectors where a dependable, corrosion-resistant locking solution is required.
• Consistent quality and thickness (0.078-0.097"), providing uniform performance in assembly processes.

Professional Applications & Engineering Value

This K500 Nickel Split Lock Washer is engineered to address critical challenges in demanding industrial applications where corrosion resistance and reliable vibration-proof locking are paramount. The K500 Nickel material offers superior performance in corrosive atmospheres, such as marine, chemical processing, and offshore equipment, preventing premature failure that plagues standard steel washers. Its standard split lock washer design provides continuous spring action, maintaining clamp load and preventing loosening of 5/16" screws under dynamic loads and thermal expansion. This combination of a robust nickel alloy and precise ASME B18.21.1 compliant form ensures long-term joint integrity, reduces maintenance downtime, and enhances the overall reliability of assembled components in critical machinery and infrastructure.

Specification Summary & Compliance

This washer features an Inside Diameter (ID) of 0.322", Outside Diameter (OD) of 0.583", and a Thickness ranging from 0.078" to 0.097", designed for a 5/16" screw size. It conforms to the ASME B18.21.1 standard, ensuring dimensional accuracy and mechanical performance for Split Lock Washers in the inch system. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its adherence to strict environmental and safety standards for hazardous substances.