Overview Reviews Product Description Machine screw nuts are used with machine screws and are usually smaller than 1/4". Zinc plated fasteners have good corrosion resistant qualities and are a good choice for indoor, outdoor and industrial applications. Papco Nuts Catalog Product Videos Custom Field Box quantity 100 Diameter 5/16"-18 Plating Zinc Product Reviews Write a Review Write a Review × Paulin 5/16"-18 UNC Zinc Plated Machine Screw Hex Nut 100 Pc. 184-016 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *