S-95584A511 0.221" ID x 0.475" 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 to prevent loosening under dynamic loads
• Corrosion-resistant 18-8 stainless steel construction ensures long-term reliability in harsh industrial environments
• Precision-engineered dimensions (0.475" OD, 0.221" ID) provide optimal fit and performance for No. 12 screw applications
• ASME B18.21.1 compliance guarantees consistent quality and interchangeability in industrial assemblies
• Environmental regulation compliance with RoHS 3 and REACH standards for global manufacturing applications
• Thin profile design (0.020-0.027" thickness) maintains assembly integrity without adding significant bulk
• External tooth configuration creates maximum surface contact for enhanced locking performance

Professional Applications & Engineering Value

This external tooth lock washer delivers critical vibration resistance in demanding industrial applications where fastener security is paramount. Manufactured from 18-8 stainless steel, it provides excellent corrosion resistance for machinery exposed to moisture, chemicals, or outdoor elements. The precisely formed external teeth create multiple biting points that dig into both the fastener and mating surface, effectively preventing rotational loosening caused by vibration or thermal cycling. This ASME B18.21.1 compliant washer is engineered specifically for No. 12 screw applications in equipment assembly, automotive components, electrical enclosures, and heavy machinery where reliable fastener retention is essential for operational safety and reduced maintenance intervals.

Specification Summary & Compliance

This tooth lock washer features inch system dimensions with 0.475" outer diameter, 0.221" inner diameter, and thickness ranging from 0.020" to 0.027". Manufactured to ASME B18.21.1 specifications for dimensional accuracy and performance consistency. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and global market acceptance. Designed specifically for use with No. 12 screws in industrial applications requiring reliable vibration resistance.