S-90073A040 1.28" ID x 1.79" OD ASME B18.21.1 Split Lock Washers for Socket Head Screws

Key Features & Benefits at a Glance

• Superior vibration resistance ensures fasteners remain securely locked even under intense mechanical stress and dynamic loads
• Precision-engineered 1.28" ID provides perfect fit for 1 1/4" screws, eliminating play and maintaining alignment in critical assemblies
• Rockwell C38 hardness rating delivers exceptional durability and spring tension for long-term locking performance without deformation
• ASME B18.21.1 compliance guarantees consistent quality, dimensional accuracy, and reliable performance in industrial applications
• Robust steel construction withstands heavy-duty use while resisting corrosion in demanding environments
• RoHS 3 and REACH compliance ensures environmental safety and regulatory acceptance for global industrial supply chains
• Standard split lock design creates continuous spring action that compensates for loosening from thermal cycling and vibration

Professional Applications & Engineering Value

This steel split lock washer addresses critical vibration-induced loosening challenges in heavy machinery, automotive assemblies, and structural frameworks. The Rockwell C38 hardness provides optimal spring tension that maintains constant pressure on fastener assemblies, while the precisely engineered 1.28" ID ensures perfect compatibility with 1 1/4" screws. The split lock design creates a reliable spring action that compensates for thermal expansion, mechanical settling, and continuous vibration - common failure points in industrial equipment. Manufactured to ASME B18.21.1 standards, these washers deliver predictable performance in high-stress applications including pump systems, conveyor assemblies, and heavy equipment where vibration resistance is paramount for operational safety and reduced maintenance intervals.

Specification Summary & Compliance

This split lock washer features precise dimensions with 1.28" ID, 1.79" OD, and 0.313" thickness, engineered for Class 2A inch system tolerances. Manufactured in compliance with ASME B18.21.1 specifications for standard lock washers, ensuring dimensional consistency and mechanical performance. The product meets RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) requirements for chemical safety, making it suitable for regulated industrial markets and environmentally conscious manufacturing operations.