Overview Reviews Product Description Perma-Coil Kit - Inch Coarse Thread - 5/16 -18 Product Videos Custom Field Product Reviews Write a Review Write a Review × Perma-Coil Kit - Inch Coarse Thread - 5/ Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *