5/16"-18 tpi Coarse Hex-Drive Rethreading Tap from 260 /per Qty. Add to Cart This item is currently on backorder, but you can still purchase it now and we'll ship as soon as more become available. 5/16" diameter NC-USS (18 threads per inch) hex thread-restoring tap (1-5/8" long) You can use a 3/8" 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 Silver zinc-plated NOTE: Photo shows 1/4"-20 tpi, 5/16"-18, 3/8"-16, 7/16"-14, 1/2"-13, and 9/16"-12 tpi taps. MADE IN USA SKU:TC2