S-95584A207 0.256" ID x 0.51" OD ASME B18.21.1 External-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with external teeth design that bites into mating surfaces to prevent loosening under dynamic loads
• Excellent corrosion resistance from 18-8 stainless steel construction, ideal for harsh industrial environments
• Precision dimensional control with 0.256" ID and 0.51" OD ensuring perfect fit for 1/4" fasteners
• Optimized thickness range (0.023-0.028") provides consistent spring tension and reliable locking performance
• Industry-standard compliance with ASME B18.21.1 specifications for guaranteed quality and interchangeability
• Environmental responsibility with RoHS 3 and REACH compliance, meeting strict international regulatory standards
• Durable external tooth configuration maintains locking effectiveness through multiple installation cycles

Professional Applications & Engineering Value

These external tooth lock washers deliver critical vibration resistance in demanding industrial applications where fastener security is paramount. The 18-8 stainless steel construction provides exceptional corrosion resistance, making them ideal for outdoor equipment, marine environments, and chemical processing facilities where moisture and corrosive elements are concerns. The external teeth design creates multiple biting points that dig into both the fastener head and mating surface, distributing locking force evenly to prevent rotational loosening caused by vibration or thermal cycling. This ASME B18.21.1 compliant washer addresses common assembly challenges in machinery, automotive components, and electrical enclosures where maintaining bolt preload is essential for operational safety and reduced maintenance intervals. The precise 0.256" ID and 0.51" OD dimensions ensure proper seating and alignment, while the controlled thickness range maintains consistent spring tension across production batches.

Specification Summary & Compliance

This 1/4" external tooth lock washer features inch system dimensions with internal diameter of 0.256", external diameter of 0.51", and thickness range of 0.023-0.028". Manufactured to ASME B18.21.1 standards for dimensional accuracy and performance requirements. The product is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant (updated 06/14/2023, 235 SVHC), meeting current environmental regulations for hazardous substance restrictions. Constructed from 18-8 stainless steel with external tooth location for maximum locking effectiveness in industrial fastener applications.