S-95584A317 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 that bite into mating surfaces, preventing loosening under dynamic loads
• Exceptional corrosion protection through Black Oxide coated 18-8 Stainless Steel construction for harsh environments
• Optimized dimensional precision with 0.256" ID and 0.51" OD ensuring perfect fit for 1/4" screw applications
• Enhanced mechanical durability with Rockwell B88 hardness maintaining tooth integrity through repeated installations
• Guaranteed compliance with ASME B18.21.1 specifications for consistent performance in industrial assemblies
• Environmental responsibility through RoHS 3 and REACH compliance, safe for regulated applications
• Reliable spring action from precisely controlled 0.023-0.028" thickness providing consistent locking force

Professional Applications & Engineering Value

These external tooth lock washers deliver critical vibration resistance in demanding applications where fastener security is paramount. The Black Oxide 18-8 Stainless Steel construction provides dual protection against corrosion while maintaining the material's inherent strength, making them ideal for outdoor equipment, marine components, and chemical processing installations. The external tooth configuration concentrates locking force across a wider surface area, preventing damage to softer materials while ensuring positive engagement. Engineers specify these ASME B18.21.1 compliant washers for machinery, automotive subsystems, and electrical enclosures where thermal cycling and mechanical stress would compromise standard fasteners. The precise 0.256" ID guarantees perfect alignment with 1/4" screws, eliminating installation issues and reducing assembly time.

Specification Summary & Compliance

Manufactured to ASME B18.21.1 dimensional and performance standards with internal diameter of 0.256" and external diameter of 0.51". Material thickness maintained between 0.023-0.028" for consistent spring performance. The 18-8 Stainless Steel base material with Black Oxide surface treatment provides corrosion resistance while achieving Rockwell B88 hardness for mechanical durability. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental safety and global market acceptance.