S-91108A360 0.32" ID x 0.61" OD ASME B18.21.1 Internal-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance through internal tooth design that bites into mating surfaces, preventing fastener loosening in high-stress applications
• Exceptional corrosion resistance with 316 stainless steel construction, ideal for harsh environments including marine and chemical processing
• Precise dimensional compatibility with 5/16" screws (0.32" ID, 0.61" OD) ensuring perfect fit and optimal locking performance
• Industry-standard compliance with ASME B18.21.1 specifications, guaranteeing consistent quality and reliable mechanical performance
• Environmental regulation compliance with RoHS 3 and REACH standards, suitable for global manufacturing requirements
• Heavy-duty locking capability through internal tooth configuration that provides maximum grip without damaging surfaces
• Consistent thickness control (0.028-0.034") ensuring uniform pressure distribution and reliable clamping force

Professional Applications & Engineering Value

These 316 stainless steel internal tooth lock washers deliver critical vibration resistance in demanding industrial applications where fastener security is paramount. The internal tooth location provides superior biting action that prevents rotational loosening under dynamic loads, while the marine-grade 316 stainless steel offers exceptional resistance to chloride-induced corrosion, making these washers ideal for offshore equipment, chemical processing plants, and food processing machinery. Engineered to ASME B18.21.1 standards, these precision washers maintain dimensional integrity across temperature variations, ensuring consistent locking performance in heavy-duty industrial assemblies where reliability cannot be compromised.

Specification Summary & Compliance

This tooth lock washer features precise inch dimensions (ID: 0.32", OD: 0.61", Thickness: 0.028-0.034") specifically designed for 5/16" screws with internal tooth configuration. Manufactured in compliance with ASME B18.21.1 mechanical standards for dimensional accuracy and performance. The washers are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, containing no restricted substances and meeting current SVHC requirements as of June 2023.