Selfmade Tools for Wooden Threads Part II: the TAP - YouTube
The nuts and bolts of threading wood | Wood
The Beall Tool Company
Kings County Tools Tap and Die Set | 1-Inch Size | Cuts Male & Female Wooden Threads | Made From Long-Lasting Hardwood with Internal Aluminum Wear Fittings - Walmart.com
Amazon.com: Kings County Tools Tap and Die Set | 3/4 Inch Size | Cuts Male & Female Wooden Threads | Two-Handed Thread Box | Bottoming Tap | Long-Lasting Steel Cutters with Aluminum