Overview Reviews Product Description 5/16 inch x 18TPI x 3-1/2 inch Flat Head Phillips Machine Screw,18.8 Stainless Steel Product Videos Custom Field UOM EA Product Reviews Write a Review Write a Review × 5/16-18X3 1/2 MACH SCR FLT HD PHIL SS Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *