S-98438A036 0.768" ID x 1.26" OD ASME B18.21.1 External-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with external teeth that bite into mating surfaces, preventing loosening under dynamic loads
• Exceptional corrosion resistance from 400 Series Stainless Steel construction for long service life in harsh environments
• Precise dimensional fit with 0.768" ID specifically engineered for 3/4" screw applications
• Enhanced durability with Rockwell C34 hardness rating for reliable performance under heavy-duty conditions
• Industry-standard compliance meeting ASME B18.21.1 specifications for quality assurance
• Environmental responsibility with RoHS 3 and REACH compliance for safe industrial use
• Optimized load distribution through 1.26" OD design that spreads pressure evenly across surfaces

Professional Applications & Engineering Value

These 400 Series Stainless Steel external tooth lock washers deliver critical vibration resistance in demanding industrial applications where fastener security is paramount. The external tooth configuration provides superior locking action by creating multiple biting points that embed into both the fastener and workpiece surfaces, effectively resisting rotational forces and vibrational loosening. Engineered to ASME B18.21.1 standards, these washers maintain consistent performance in heavy machinery, automotive assemblies, construction equipment, and manufacturing systems where dynamic loads and temperature variations challenge conventional fastening solutions. The Rockwell C34 hardness ensures the teeth maintain their biting capability through repeated stress cycles, while the corrosion-resistant stainless steel composition prevents degradation in outdoor or chemically aggressive environments.

Specification Summary & Compliance

This external tooth lock washer features precise dimensional specifications including 0.768" inner diameter, 1.26" outer diameter, and thickness range of 0.047-0.055". Manufactured in compliance with ASME B18.21.1 standards for tooth lock washers, the component ensures dimensional accuracy and performance reliability. The product meets RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) regulations (updated 06/14/2023, 235 SVHC), confirming environmental safety and regulatory adherence for industrial distribution and use.