9/16"-18 tpi Fine Hex-Drive Rethreading Tap from 410 /per Qty. Sold Out This item is currently on backorder, but you can still purchase it now and we'll ship as soon as more become available. 9/16" diameter NF-SAE (18 threads per inch) hex thread-restoring tap (2-1/16" long) You can use a 5/8" wrench or socket to run rethreading tap into threaded hole Rethreading tap will not crosscut or undercut the thread the way a cutting tap will NOTE: Photo shows 1/4"-28 tpi and 9/16"- 18 tpi taps as examples. Black oxided MADE IN USA SKU:TF6