S-91101A233 0.512" ID x 0.869" OD ASME B18.21.1 Split Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance prevents fastener loosening in high-stress applications
• Rockwell C38 hardness ensures long-term durability and maintains spring tension under repeated loading
• Precise 0.512" ID provides perfect fitment for 1/2" screws without play or misalignment
• ASME B18.21.1 compliance guarantees dimensional accuracy and reliable performance to industry standards
• RoHS 3 and REACH compliance meets environmental regulations for global industrial applications
• 0.869" OD design offers optimal bearing surface distribution for enhanced load distribution
• Steel construction delivers excellent strength-to-weight ratio for demanding mechanical assemblies

Professional Applications & Engineering Value

This split lock washer delivers critical vibration resistance in industrial machinery, automotive assemblies, and heavy equipment where constant motion threatens fastener integrity. The steel material with Rockwell C38 hardness maintains consistent spring action even after multiple compression cycles, solving the common problem of lost tension in high-vibration environments. Engineered to ASME B18.21.1 standards, these standard split lock washers provide reliable performance in inch system applications from manufacturing plants to maintenance operations. The split design creates continuous upward force against the nut or bolt head, effectively preventing rotational loosening that compromises assembly safety and longevity.

Specification Summary & Compliance

This split lock washer features precise dimensions: 0.512" ID, 0.869" OD, and 0.125" thickness specifically engineered for 1/2" screws. Manufactured to ASME B18.21.1 specifications for dimensional accuracy and performance reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for global industrial supply chains and regulated applications.