Du-Bro 391 4-40 Threaded Inserts 4pk

Du-Bro 4-40 Threaded Inserts provide a secure and reliable way to add threads to wood, making them ideal for mounting engines or creating wing hold downs where blind nuts won’t fit. Made from durable brass, these inserts are easy to install and work well in both RC and general woodworking applications. Pack includes 4 inserts.

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