S-93496A405 0.12" ID x 0.209" OD ASME B18.21.1 Split Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance due to the split lock design, preventing fastener loosening in high-stress applications
• Excellent corrosion resistance from bronze material, ideal for harsh industrial environments and outdoor use
• Reliable hardness and durability with Rockwell B90 rating, ensuring long service life and consistent performance
• Precise dimensional fit for No. 4 screws with 0.12" ID and 0.209" OD, providing secure fastening without slippage
• Compliance with industry standards including ASME B18.21.1, guaranteeing quality and interchangeability
• Environmental regulation adherence with RoHS 3 and REACH compliance, safe for regulated industries
• Optimal spring action from 0.025" thickness and standard split design, maintaining constant tension under load

Professional Applications & Engineering Value

This Bronze Split Lock Washer delivers exceptional engineering value in applications where vibration-induced loosening compromises assembly integrity. The bronze material provides natural corrosion resistance, making it suitable for marine, chemical processing, and outdoor equipment where moisture and corrosive elements are present. With its standard split lock design and Rockwell B90 hardness, it maintains consistent spring tension under thermal cycling and dynamic loads. The precise 0.12" ID and 0.209" OD dimensions ensure perfect fitment for No. 4 screws, eliminating play while the split configuration creates continuous friction against both fastener and surface. These industrial washers solve critical fastening challenges in machinery, electrical enclosures, and transportation equipment where reliability cannot be compromised.

Specification Summary & Compliance

This split lock washer features inch system dimensions: 0.12" internal diameter, 0.209" external diameter, and 0.025" thickness specifically engineered for No. 4 screw applications. Manufactured to ASME B18.21.1 specifications for dimensional accuracy and performance requirements. The washer demonstrates full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance across global markets. The standard split lock washer type with Rockwell B90 hardness provides consistent mechanical properties batch-to-batch for reliable engineering outcomes.