S-91101A030 0.322" ID x 0.583" OD ASME B18.21.1 Split Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance prevents fastener loosening in high-stress applications
• High-strength steel construction with Rockwell C38 hardness ensures long-term durability and load-bearing capacity
• Precision-engineered split design creates continuous spring tension for reliable locking performance
• Perfect fit for 5/16" fasteners with 0.322" ID and 0.583" OD dimensions for optimal contact and distribution
• Industry-standard compliance with ASME B18.21.1 guarantees consistent quality and interchangeability
• Environmental regulation compliance with RoHS 3 and REACH ensures safe use across global markets
• Heavy-duty thickness of 0.078" provides substantial spring action for maximum locking force

Professional Applications & Engineering Value

These split lock washers deliver critical vibration resistance in demanding industrial environments where mechanical fasteners face constant stress and movement. Manufactured from high-strength steel with precise Rockwell C38 hardness, they maintain spring tension under extreme conditions that would compromise ordinary washers. The standard split lock washer design creates continuous upward force against the fastener head or nut, effectively preventing rotational loosening in machinery, automotive assemblies, and structural applications. Engineered to ASME B18.21.1 specifications with exact 0.322" ID and 0.583" OD dimensions for 5/16" screws, these washers ensure proper fit and maximum surface contact. Their robust construction addresses the common industrial challenge of maintenance-intensive fastener systems, reducing downtime and improving operational safety across manufacturing, construction, and heavy equipment sectors.

Specification Summary & Compliance

This split lock washer features precise inch system dimensions with 0.322" internal diameter, 0.583" external diameter, and 0.078" thickness specifically engineered for 5/16" fasteners. Manufactured to ASME B18.21.1 standards for dimensional accuracy and performance requirements. The Rockwell C38 hardness rating ensures consistent mechanical properties and spring characteristics. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting current environmental and safety standards for industrial components.