RS PRO Tap Set, #4 UNC Thread

One taper tap (with a 4° chamfer) and one plug tap (with 23° chamfer) per set
Supplied in polypropylene tubes

Supplied in Pairs (1x Plug with 23° Chamfer Angle; 1x Taper with a 4° Chamfer Angle); Individual Taper, Second and Plug Taps in ISO Metric Course also Available