6-Piece NC Coarse Hex-Drive Rethreading Tap Set, 1/4"–9/16" from 1600 /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. Six Hex-Drive NC Thread-Restoring Taps (1/4"-20 tpi, 5/16"-18, 3/8"-16, 7/16"-14, 1/2"-13, & 9/16"-12 tpi) All NC rethreading taps are silver zinc–plated so you can tell them apart from black oxided NF and gold zinc–plated metric taps Weight: 0.47 lb MADE IN USA SKU:T6C