3/8-16 Tap with Handle

1. Spray some cutting fluid, WD40, or other oil to aid in cutting.

2. Hold the tap in line with the t-nut and turn it clockwise. Try to keep it very straight as you turn; this is important.

3. Every few turns, back the tap out (counterclockwise) to clear away chips of loose material.

4. When the tap has passed through the t-nut, back it out, clean out chips and any cutting fluid or lubricant, and try a bolt with your hand first.