42pc Metric + Imperial UNF UNC Rethread Tap + Die Kit M6 – M14 1/4in – 5/16in
National Coarse – 1/4″x20, 5/16″x18, 3/8 x16, 7/16″x14, 1/2″x13, 9/16 . For use with a standard spanner. National Fine – 1/4″x28, 5/16″x24, 3/8 ×24, 7/16″x20, 1/2 x20, 9/16 x18tpi.
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