16ER2.5ISO-A1 CP500 Insert Threading 1070873_10pk Note that these gaskets are

Note that these gaskets are not intended for race applications

Length of Cut:12

Trubor 5/16" HSS Std Slot Drill For general milling of slots & cavities

This engine cleanliness combined with the low coefficient of friction of Royal Purple HP 2-C promotes increased horsepower and engine speed

Different sizes for the size of the steel or aluminum involved

16ER2.5ISO-A1 CP500 Insert Threading 1070873_10pk Note that these gaskets areISO Metric 2. 50mm external pitch threading insert. "A1" is an optimizing geometry for steel components Grade CP500. This grade features a highly wear restistant PVD coating to provide dependable machining for a large majority of common thread turning applications.