Overview Product Description Tap Plug 5/16"-24nf C. Made of shock-resistant and heat treated S2 steel for maximum strength and hardness, ideal for maintenance and repair work Product Videos Custom Field Product Reviews Write a Review Write a Review × Irwin TAP 5/16-24 NF PLUG Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *