5/16"-18 tpi Coarse NC-USS Rethreading Die from 100 /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) nut-sized hex thread-restoring die (1/2" across the flats) You can use same wrench or socket to remove nut and run rethreading die on bolt or stud Rethreading die will not crosscut or undercut the thread the way a cutting die will Silver zinc–plated NOTE: Photo shows 1/4" NC and 3/4" NC as examples of NC dies. MADE IN USA SKU:5/16CD-18