S-90588A116 0.32" ID x 0.9" OD ASME B18.21.1 Internal / External-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance through internal and external teeth design that maintains secure locking under dynamic loads
• Enhanced corrosion resistance with 410 stainless steel construction for extended service life in harsh environments
• Precise dimensional compatibility with 0.32" ID and 0.9" OD ensuring perfect fit for 5/16" fasteners
• Optimized thickness range (0.032-0.040") provides consistent performance while accommodating minor surface variations
• Industry-standard compliance with ASME B18.21.1 specifications guarantees reliable performance and interchangeability
• Environmental responsibility with RoHS 3 and REACH compliance for safe use in regulated industries
• Dual-direction locking action from internal/external teeth configuration creates maximum resistance to loosening

Professional Applications & Engineering Value

This 410 stainless steel tooth lock washer delivers critical vibration resistance in demanding industrial applications where fastener security is paramount. The unique internal/external teeth configuration creates multiple biting surfaces that dig into both the fastener and mating surface, effectively preventing rotation and backing out under extreme vibration conditions. Engineered to ASME B18.21.1 standards, these tooth lock washers provide reliable performance in heavy machinery, automotive assemblies, and industrial equipment where thermal cycling and dynamic stresses compromise conventional fastening solutions. The corrosion-resistant properties of 410 stainless steel ensure long-term reliability in environments exposed to moisture, chemicals, and temperature variations, making them ideal for outdoor equipment, marine applications, and processing facilities.

Specification Summary & Compliance

This tooth lock washer features precise dimensional specifications with 0.32" inner diameter, 0.9" outer diameter, and thickness ranging from 0.032" to 0.040" for compatibility with 5/16" screw sizes. Manufactured in compliance with ASME B18.21.1 standards for dimensional accuracy and performance requirements. The product meets RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) regulations concerning chemical substances, ensuring environmental responsibility and workplace safety.