Brass Machine Screw, Pan Head, Phillips Drive, #8-32, 2-1/2" Length (Pack of 25)
Machine Screws, also referred to as Machine Bolts, are often used with nuts or driven into tapped holes.  They come in a variety of head types and drive styles, but are generally available in smaller sizes.Brass is rust proof, corrosion resistant and polishes to a rich, golden color.  Brass is easily soldered and brazed and accepts plating readily.  The typical composition is 70% Copper and 30% Zinc.  Strength increases with a higher percentage of Zinc.Pan head fasteners have a low, large cylindrical head with a high rounded top edge for higher tightening torques - these fasteners are often recommended to replace older head styles such as round, binding, or truss-head where possible.  The Phillips drive style was originally designed so that the driver would slip out under extreme torque, preventing over-tightening and damage to the fastener or the material.A threaded fastener's size name includes information about the major external diameter, followed by the threads per inch, which indicates if it is coarse or fine.  Coarse threads are better when working with brittle materials; they are sturdier and are easier to thread and unthread compared to fine.  Coarse threading also allows for thicker coatings and platings.