S-91101A229 0.26" ID x 0.487" OD ASME B18.21.1 Split Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance prevents loosening under dynamic loads, ensuring long-term joint integrity.
• High-strength steel construction with Rockwell C38 hardness provides reliable, durable locking force.
• Precise 0.26" ID and 0.487" OD dimensions ensure a perfect fit for 1/4" screws, simplifying installation.
• Standard split lock design offers consistent spring action and reusability for maintenance efficiency.
• Full compliance with ASME B18.21.1 guarantees dimensional accuracy and performance reliability.
• RoHS 3 and REACH compliant for safe use in regulated industrial and international markets.
• 0.062" thickness provides optimal deflection for effective locking without compromising space.

Professional Applications & Engineering Value

These split lock washers are engineered to solve critical vibration-induced loosening in industrial applications. Made from high-carbon steel and heat-treated to a Rockwell C38 hardness, they deliver exceptional spring force that maintains bolt preload in machinery, automotive assemblies, and heavy equipment. The standard split lock washer type with precise 0.26" ID ensures easy installation on 1/4" screws, reducing assembly time and preventing failures. By meeting ASME B18.21.1 specifications, these washers provide consistent performance in high-stress environments, making them ideal for OEM and MRO use where reliability is non-negotiable.

Specification Summary & Compliance

This washer features an ID of 0.26", OD of 0.487", and thickness of 0.062" for use with 1/4" screws, manufactured to ASME B18.21.1 standards for dimensional accuracy and functional reliability. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for global industrial supply chains.