ARP Thread Cleaning Chasers
ARP's Thread Cleaning Chasers are designed with correct thread pitch and diameter to clean dirty blind or thru holes. These taps come in five USS sizes: 1/4?, 5/16?, 3/8?, 7/16? and 1/2?, as well as metric. They are a handy addition to the tool box of any serious engine builder and an essential aid to preparing any block for final assembly. Sold individually.
Note: These are strictly cleaning taps and are NOT designed to cut thread.