Heavy-Duty 7/16 in Internal Tooth Lock Washers, Zinc-Plated
✔️ Grade 2 steel, zinc finish, 100-pack, handy for auto and home

These internal tooth lock washers are rugged fasteners designed to bite into mating surfaces for a secure, vibration-resistant fit. The zinc-plated steel construction helps resist rust, making them a solid choice for automotive, machinery, and home projects.

✅ Diameter 1: 7/16 inch
✅ Diameter 2: 51/64 inch
✅ Material: Steel, zinc finish
✅ Hardness: Grade 2
✅ Pack size: 100 pieces

💡 What is an internal tooth lock washer used for in heavy-duty fastener assemblies?

Handy for keeping fasteners tight in vibrating systems like automotive and machinery.

- Helps resist loosening under load - Maintains clamping force in dynamic environments - Easy to install with standard tools