S-91812A808 1.24" ID x 1.85" OD Extreme-Vibration-Resistant Wedge Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance through dual top and bottom serrations that bite into mating surfaces, preventing rotational loosening in high-stress environments
• Exceptional corrosion resistance with 316 stainless steel construction, ideal for harsh chemical, marine, and outdoor applications
• Enhanced durability and wear resistance from case hardening to Rockwell C51 hardness, maintaining performance under repeated loading
• Maximum clamping force retention through the wedge lock design that increases tension as vibration attempts to loosen the assembly
• Dual measurement system compatibility fitting both 1 1/8" and M30 screw sizes, providing flexibility for international projects
• Precise dimensional control with 1.24" ID, 1.85" OD, and 0.260-0.280" thickness ensuring consistent performance and easy installation
• Environmental compliance assurance meeting RoHS 3 and REACH standards for use in regulated industries worldwide

Professional Applications & Engineering Value

This 316 stainless steel wedge lock washer solves critical loosening problems in heavy machinery, construction equipment, and transportation systems where vibration-induced failure is a major concern. The dual serration design creates multiple biting surfaces that mechanically resist rotation, while the case hardened construction to Rockwell C51 ensures the serrations maintain their grip through countless stress cycles. Unlike standard washers that gradually lose tension, the wedge action actually increases clamping force as vibration attempts to loosen the joint. This makes it particularly valuable for bolted connections in mining equipment, offshore platforms, and industrial processing machinery where safety and reliability are paramount. The 316 stainless steel material provides superior resistance to chlorides and chemicals, extending service life in corrosive environments where ordinary fasteners would rapidly degrade.

Specification Summary & Compliance

This heavy-duty washer features precise dimensions of 1.24" ID × 1.85" OD with thickness ranging 0.260-0.280", designed to accommodate both 1 1/8" and M30 screw sizes. The case hardened treatment achieves Rockwell C51 hardness for exceptional wear resistance, while the dual serrations (top and bottom) provide maximum anti-rotation performance. The product fully complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for industrial applications worldwide.