This threadbox and tap, for cutting external and internal threads in wood, is useful for making clamps, jigs, fixtures, knockdown furniture, toys, and novelties. Although traditional in design, modern technology and metallurgical advances have improved the traditional threadbox and tap and perfected its components. Hardwood threadbox with turned handles has an aluminum insert to prevent wear and extend the tool life. Steel tap is machined to close tolerances and designed to allow easy chip clearance. The resulting wood thread is both tight fitting and strong. Includes threadbox, regular tap and instructions.
Forstner bit should be 1/8" smaller than the threading kit. Please choose forstner bit as follows.
Threading kit Forstner bit
1 1/4" 1 1/8"
1 1/2" 1 3/8"