S-90073A029 0.26" ID x 0.363" OD ASME B18.21.1 Split Lock Washers for Socket Head Screws

Key Features & Benefits at a Glance

• Superior vibration resistance through the split lock design that maintains tension under dynamic loads, preventing fastener loosening in industrial machinery.
• Enhanced durability with Rockwell C38 hardness steel construction, resisting deformation and wear in high-stress applications.
• Precise fit for 1/4" screws with a 0.26" inner diameter, ensuring easy installation and reliable performance in assembly lines.
• Compliance with ASME B18.21.1 standards guarantees consistent quality, dimensional accuracy, and interchangeability for engineering projects.
• RoHS 3 and REACH compliance ensures environmental safety and material reliability, suitable for global supply chains and regulated industries.
• Optimized dimensions (0.363" OD, 0.078" thickness) provide a balanced profile for space-constrained applications without compromising strength.
• Cost-effective maintenance by reducing the need for frequent retightening, lowering downtime in automotive, aerospace, and heavy equipment sectors.

Professional Applications & Engineering Value

This split lock washer is engineered to address critical challenges in vibration-prone environments, such as automotive assemblies, machinery mounts, and electrical enclosures. Made from high-strength steel with Rockwell C38 hardness, it counters thermal expansion and dynamic stresses that cause fastener failure. The split lock design applies continuous spring force, maintaining clamp load under shock or cyclic loads, which is essential for industrial applications requiring long-term reliability. By meeting ASME B18.21.1 standards, it ensures precise thread engagement and compatibility with 1/4" screws, reducing installation errors and enhancing safety in construction, manufacturing, and aerospace sectors.

Specification Summary & Compliance

This washer features an ID of 0.26", OD of 0.363", and thickness of 0.078", designed for 1/4" screw sizes with standard split lock washer type dimensions. It conforms to ASME B18.21.1 for dimensional and performance criteria, ensuring Class 2A thread fit and manufacturing consistency. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) confirms adherence to environmental and safety regulations, supporting use in industrial applications worldwide.