81420 Type I30-AG HSS Gold Oxide NPT Interrupted Thread Taper Pipe Tap 3.5000" ID and are machined from quality

and are machined from quality brass stock

PU316 3/16" 5/16"

Click here for spec sheets: SUCNPFL Spec Sheet

All of this yields a strong

They withstand extreme temperatures from -400° to +550° F

81420 Type I30-AG HSS Gold Oxide NPT Interrupted Thread Taper Pipe Tap 3.5000" ID and are machined from qualityInterrupted Thread Taper Pipe taps reduce friction, increase chip capacity, and enhance coolant flow. Recommended for a wide variety of materials including soft ductile materials that produce long stringy chips. Gold Oxide low temperature stress relief that enhances lubricity, reduces friction and increases tap toughness. Click Here for product catalog Proudly Manufactured in the U. S. A