![]() It has higher corrosion resistance than the 400 series stainless steels and it is non-magnetic. All 300 series stainless steel share the ratio of chromium to nickel with varying other elements improving different properties. It's strength has a range from the middle to low end of the grade scale. GradeĪ general designation for the most common and popular stainless steel, (300 Series) referring to the 18% chromium and 8% nickel. This finish should not be used in marine or high salt spray environments. Slightly less corrosion resistant than yellow zinc, it is a versatile finish that is best used indoors. It is a popular finish because of its protection, value, and ease of coating. The zinc protects the steel from corrosion and the chromate layer protects the zinc from degrading. It is an electroplated zinc layer covered with a chromate post-treatment. This finish, also know as zinc plating, zinc chromate or dichromate provides good corrosion resistance and is the standard for many hardware fasteners. This iridescent electroplated zinc finish, also known as Yellow Zinc Chromate or Dichromate, provides very good corrosion resistance and protection against rust. This most basic finish can be used when protection is not an issue or indoors. This finish is susceptible to rusting and corrosion in exterior environments. Often the surface has been oiled which improves lubricity. Nothing has been done to this bare metal surface to improve appearance or corrosion resistance, which is very low if the material is steel. This finish has been colored zinc to denote a grounded wire. This finish, also know as zinc plating, provides good corrosion resistance and is the standard for many hardware fasteners. This finish looks great when trying to achieve a stylish or "high-tech" look on exposed fastener heads. This coating reduces galling, improves lubrication of mating parts and reduces glare. FinishĪn extremely thin attractive finish with minimal corrosion resistance. This drive works well with deep drive recesses. ![]() SquareĪlso known at the Scrolux® or Robertson Drive® the drive indentation looks like a square that tapers slightly as it goes down the recess. Also know at the straight-headed drive, it one of the most common drives. SlottedĪ classic drive with the unmistakable straight slot. This combination drive mixes the square recess with a Philips recess. Phillips Slotted ComboĪ combination of two classic drives, either the Phillips, the unmistakable plus sign indentations or Slotted, the straight slot, drive can be used on this head. Also know at the cross-point drive, it one of the most common drives. PhillipsĪ classic drive with the unmistakable plus sign indentation. It is commonly used in the automotive industry. Also known as the Torx™ Drive, it's six points and star shape give it a high torque capability. ![]()
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