S-91104A065 1.534" ID x 2.491" OD ASME B18.21.1 Oversized Split Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance prevents fastener loosening in high-stress applications, ensuring long-term joint integrity.
• Exceptional durability from Grade 8 strength and Rockwell C38 hardness, providing reliable performance under heavy loads.
• Enhanced corrosion protection with zinc yellow-chromate plating, extending service life in harsh industrial environments.
• Precise fit for 1 1/2" screws with a 1.534" ID, ensuring easy installation and optimal locking force distribution.
• Guaranteed quality and interchangeability through compliance with the ASME B18.21.1 standard.
• Safe for regulated industries with full REACH compliance, ensuring no use of hazardous substances.
• Robust construction with a 2.491" OD and 0.458" thickness, offering a large bearing surface and consistent spring action.

Professional Applications & Engineering Value

This heavy-duty Grade 8 split lock washer is engineered to solve critical challenges in machinery, construction, and automotive assembly where vibration-induced loosening is a major concern. The zinc yellow-chromate plated steel construction provides a robust barrier against rust and corrosion, making it ideal for outdoor or chemically aggressive environments. Its standard split lock design and precise 1.534" ID ensure a perfect fit for 1 1/2" screw applications, delivering consistent spring tension that maintains clamp load. By meeting the ASME B18.21.1 specification, it guarantees dimensional accuracy and reliable performance, reducing maintenance downtime and enhancing the safety of industrial fastening systems.

Specification Summary & Compliance

This washer conforms to ASME B18.21.1 for dimensional and functional requirements, ensuring precise fit and performance. It is manufactured from zinc yellow-chromate plated steel with a hardness of Rockwell C38 and is rated for Grade 8 strength applications. The product is fully compliant with REACH (EC 1907/2006) regulations as of 06/14/2023, confirming it is free from 235 Substances of Very High Concern (SVHC), making it safe for use in regulated markets.