Experience the secure fastening solution with E-Z LOK's 329-6 threaded locking inserts. Ideal for a variety of applications, these inserts come in a convenient pack of 10, ensuring you have the necessary quantity for multiple usages. Crafted with precision in the United States, they provide a reliable and durable option for your locking needs. The 3/8-16 x 9/16-12 size is perfect for providing a tamper-evident seal on threads, making them suitable for both industrial and personal use. With the model number 329-6 and MPN P3250311, you can be confident in the quality and consistency of the product you're receiving from the trusted brand, E-Z LOK.