Grade
The classification of the screw based on its material properties and strength.
18-8
A general designation for the most common and popular stainless steel, (300 Series) referring to the 18% chromium and 8% nickel. It's strength has a range from the middle to low end of the grade scale. All 300 series stainless steel share the ratio of chromium to nickel with varying other elements improving different properties. It has higher corrosion resistance than the 400 series stainless steels and it is non-magnetic.
410
This less common type of stainless steel is of higher strength than the more common stainless steel grades. It is a good choice when a balance between strength and corrosion resistance are needed. Used in industrial and medical applications, it will keep a sharp edge when used for cutting.
Case Hardened
<p>This surface hardening process allows the interior of the fastener to maintain fracture resistance, while increasing the outer shell strength of the steel. This process is used to increase strength of medium carbon steels.</p>
