Value Collection - Machine Screws System of Measurement: Inch Thread Size (Inch): 5/16-18

Flat undercut head types have a flat surface that begins to taper toward the body but is undercut to allow for shallow countersinking that standard flat head fasteners cannot achieve.

Phillips drive types have a cross-shaped slot and are used with Phillips drivers. To prevent damage to the fastener head and fastened surface, the drive design forces the driver to cam out when the fastener is sufficiently tightened.

Stainless steel is a strong, corrosion-resistant alloy with excellent resistance to heat. It is used in high-stress, outdoor and corrosive applications.