S-91101A039 1.153" ID x 1.847" OD ASME B18.21.1 Split Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance due to high-strength steel construction and Rockwell C38 hardness, preventing fastener loosening in high-stress applications
• Precise dimensional compatibility with 1 1/8" screws, ensuring optimal fit and consistent performance across assemblies
• Reliable spring action from the standard split design, maintaining constant tension under dynamic loads and thermal cycling
• Extended service life through hardened steel material that resists deformation and maintains locking force through repeated use
• Industry-standard compliance with ASME B18.21.1 specifications, guaranteeing interchangeability and performance predictability
• Environmental responsibility with RoHS 3 and REACH compliance, meeting strict international substance restrictions
• Optimized for industrial environments with inch measurement system compatibility, simplifying procurement and inventory management

Professional Applications & Engineering Value

This split lock washer delivers critical vibration resistance in demanding industrial applications where mechanical fasteners face constant dynamic stresses. Engineered from high-strength steel with Rockwell C38 hardness, it maintains consistent spring tension that prevents back-off in machinery, heavy equipment, and structural assemblies. The standard split design creates continuous upward force against the bolt/nut, compensating for material relaxation and thermal expansion. Particularly valuable for 1 1/8" screw applications in manufacturing, construction, and transportation sectors, this washer solves the persistent challenge of fastener loosening that can lead to equipment failure, maintenance downtime, and safety hazards. Its ASME B18.21.1 compliance ensures predictable performance across standardized industrial systems.

Specification Summary & Compliance

Manufactured to ASME B18.21.1 dimensional and mechanical specifications with 1.153" ID, 1.847" OD, and 0.281" thickness for precise fit with 1 1/8" fasteners. The standard split lock washer type provides reliable spring action, while Rockwell C38 hardness ensures maintained tension under load. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming adherence to international substance restrictions for industrial components.