S-90073A030 0.322" ID x 0.457" OD ASME B18.21.1 Split Lock Washers for Socket Head Screws

Key Features & Benefits at a Glance

• Superior vibration resistance due to the split lock design, preventing fastener loosening in high-stress applications
• Exceptional durability with Rockwell C38 hardness steel construction, ensuring long service life under repetitive loads
• Precise fit for 5/16" screws with 0.322" ID, 0.457" OD, and 0.093" thickness for reliable assembly and uniform load distribution
• Guaranteed quality and interchangeability through compliance with ASME B18.21.1 dimensional and performance standards
• Safe for sensitive environments with full RoHS 3 and REACH compliance, free from hazardous substances
• Wide industrial compatibility as a standard split lock washer type, suitable for machinery, equipment, and structural assemblies
• Corrosion-resistant steel material providing consistent performance in demanding operating conditions

Professional Applications & Engineering Value

This split lock washer delivers critical engineering value by solving persistent vibration-induced loosening in industrial assemblies. Manufactured from steel with Rockwell C38 hardness, it maintains spring tension under dynamic loads, making it ideal for machinery, automotive components, and heavy equipment where 5/16" screw fastening is required. The standard split lock washer type design creates continuous upward force against the bolt/nut, compensating for thermal expansion and material relaxation. With precise 0.322" ID and 0.457" OD dimensions, it ensures proper seating and load distribution while the ASME B18.21.1 standard guarantees consistent performance across applications. The combination of vibration resistance and regulatory compliance makes this washer essential for maintenance-critical and safety-sensitive installations.

Specification Summary & Compliance

This split lock washer features dimensional accuracy per ASME B18.21.1 standards with 0.322" inner diameter, 0.457" outer diameter, and 0.093" thickness, specifically engineered for 5/16" screw applications. The manufacturing process ensures consistent Rockwell C38 hardness for reliable spring performance. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming environmental safety and restricted substance adherence for industrial use.