Century Drill & Tool97117 Carbon Steel Tap, 3/4-10NC

Will it fit A.I.R tube to manifold thread in exhaust manifold of 1988 R-30 (1-ton) 5.7 (350 cid vin "K")? Need to chase the threads for new tubes.

Does anyone know which thread size will work for re-tapping the o2 sensor threads on a 2013 chevy cruze? replacing with bosch sensor #16737.

Is this a Right Hand thread tap ?

What does NS mean