Grab these machine screw nuts by Precision to fasten machine screws and threaded studs. They feature a carbon steel body to maintain longevity and high tensile strength. These Precision nuts come with zinc plating to reduce wearing and corrosion. Their coarse thread ensures minimal friction. A hexagonal design makes the nuts easy to grab and install. The nuts are available in packs of 100. | Precision Precision Standard Hexagon Machine Screw Nuts – #4 Dia – 40 Thread – Carbon Steel – 100 Per Pack 184-004 Precision | Standard Hexagon Machine Screw Nuts – #4 Dia – 40 Thread – Carbon Steel – 100 Per Pack .