S-91108A220 0.168" ID x 0.34" OD ASME B18.21.1 Internal-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with internal teeth design that bites into mating surfaces for reliable locking under dynamic loads
• Exceptional corrosion resistance from 316 stainless steel construction, ideal for harsh environments including chemical and marine applications
• Precision dimensional compatibility with No. 8 screws (0.168" ID) ensuring perfect fit and optimal clamping force distribution
• Industry-standard compliance with ASME B18.21.1 specifications guaranteeing consistent performance and interchangeability
• Environmental responsibility through RoHS 3 and REACH compliance, meeting strict international substance restrictions
• Optimized load distribution with 0.34" OD providing broad surface contact to prevent material damage
• Consistent performance maintained through controlled thickness (0.018-0.023") for uniform locking pressure

Professional Applications & Engineering Value

These 316 stainless steel internal tooth lock washers deliver critical vibration-resistant fastening solutions for demanding industrial environments. The internal tooth configuration creates multiple biting points that dig into both the fastener and workpiece, preventing rotational loosening caused by machinery vibrations, thermal cycling, or dynamic loads. Made from 316 stainless steel, these washers offer superior corrosion resistance against chlorides, chemicals, and marine atmospheres, making them ideal for chemical processing equipment, marine hardware, and food processing machinery. The ASME B18.21.1 compliance ensures dimensional precision and mechanical properties that meet rigorous industrial standards, while the specific design for No. 8 screws guarantees optimal performance in precision assemblies where reliable locking is non-negotiable.

Specification Summary & Compliance

This internal tooth lock washer features precise dimensional specifications including 0.168" inner diameter, 0.34" outer diameter, and thickness ranging 0.018-0.023". Manufactured in compliance with ASME B18.21.1 standards for tooth lock washers, ensuring consistent quality and performance. The product meets RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) compliance for chemical safety. Constructed from 316 stainless steel for corrosion resistance, with internal tooth location specifically engineered for maximum locking effectiveness in industrial fastening applications.