Whether you need a serrated flange hex locknut, external tooth locknut or reversible hex locknuts, we have the fastener you need. Locknuts are a durable option for industrial to aeronautical applications. Whether the project is large or small, we keep this product fully stocked in our online inventory. If you require a specific certain grade or metric that you don’t see on our website contact one our knowledgeable staff members at 866-463-2910. We'll be glad to help you find what you need. Shop our online selection below!