S-91104A055 1.28" ID x 2.104" OD ASME B18.21.1 Oversized Split Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance prevents fastener loosening in high-stress applications
• Grade 8 strength classification ensures maximum load-bearing capacity and reliability
• Zinc yellow-chromate plating provides excellent corrosion resistance in harsh environments
• Rockwell C38 hardness maintains structural integrity under extreme pressure and wear
• Precision ASME B18.21.1 dimensions guarantee perfect fit for 1 1/4" screw applications
• REACH compliance ensures environmental safety and regulatory adherence
• Heavy-duty split lock design delivers consistent spring action and locking performance

Professional Applications & Engineering Value

This Grade 8 split lock washer delivers exceptional engineering value in demanding industrial environments where vibration-induced fastener failure is a critical concern. The zinc yellow-chromate plated steel construction combines superior corrosion protection with the mechanical strength needed for heavy machinery, construction equipment, and automotive applications. The standard split lock washer design creates continuous spring tension that compensates for thermal expansion, material creep, and dynamic loads. With Rockwell C38 hardness and precise dimensional control, these washers maintain their locking capability through repeated stress cycles, preventing costly downtime and maintenance in industrial washers applications. The combination of ASME B18.21.1 specifications and inch system measurements ensures compatibility with North American industrial standards and replacement parts.

Specification Summary & Compliance

This heavy-duty split lock washer features precise dimensional specifications with 1.28" ID, 2.104" OD, and 0.384" thickness, engineered for 1 1/4" screw sizes. Manufactured to ASME B18.21.1 standards for dimensional accuracy and performance reliability. The component is REACH compliant (EC 1907/2006) as of June 14, 2023, meeting environmental safety requirements while maintaining Grade 8 fastener strength classification and Rockwell C38 hardness for superior mechanical properties in industrial applications.