Century Drill and Tool Carbon Steel Plug Tap 1/2-20 NF Size:1/2-20 National Fine The retrofit style creates a

The retrofit style creates a new stop by “piggybacking” onto existing defective 3/8” OD compression angle stops

Course Machine Screw Thread On The Extra Large Sizes Larger Than 1/2" x 12"

Double-sided fractional inch/decimal foot blade

Apply multiple light coats versus one heavy coat

For use with cement or plaster-based mixes on both exterior and interior projects

Century Drill and Tool Carbon Steel Plug Tap 1/2-20 NF Size:1/2-20 National Fine The retrofit style creates aHeat treated and tempered for file hard threads and longer useful life Designed for hand cutting applications The plug style tap is the most commonly used style of tap with 3 to 5 threads chamfered Best drill: 29 64 Use with Cutting Oil when cutting threads in metal.