S-91102A040 1.28" ID x 2.036" OD ASME B18.21.1 Split Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance prevents fastener loosening in high-stress applications
• Zinc-plated steel construction provides excellent corrosion protection for extended service life
• Rockwell C38 hardness rating ensures consistent spring action and reliable locking performance
• ASME B18.21.1 compliance guarantees dimensional accuracy and interchangeability
• RoHS 3 and REACH compliance meets international environmental and safety standards
• Optimized 1.28" ID and 2.036" OD dimensions ensure perfect fit for 1 1/4" screws
• Standard split lock design delivers proven reliability across industrial applications

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these zinc-plated steel split lock washers provide critical vibration resistance in mechanical assemblies where thermal cycling and dynamic loads threaten fastener integrity. The split lock washer design creates continuous spring tension that compensates for material relaxation and prevents rotational loosening. Particularly valuable in heavy machinery, automotive systems, and construction equipment, these ASME B18.21.1 certified washers maintain clamp force under extreme conditions. The zinc plating offers sacrificial protection against corrosion, extending service life in outdoor or humid environments while the Rockwell C38 hardness ensures the washer maintains its spring characteristics through repeated loading cycles.

Specification Summary & Compliance

This standard split lock washer features precise dimensions of 1.28" ID, 2.036" OD, and 0.312" thickness, engineered for 1 1/4" screw applications. Manufactured to ASME B18.21.1 specifications with Rockwell C38 hardness certification, ensuring consistent performance and dimensional accuracy. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting the latest environmental and safety standards for industrial components.