This finish starts with a mechanically plated zinc base layer. This coating is approved for use with ACQ lumber. It is also designed to resist surface chipping and marring. This multi-layer electroplated finish features a tough film for good corrosion resistance. If a stylish finish is required as well as corrosion protection this is a good option. It is thicker than a Black Oxide finish, so on tight fitting parts be wary of this finish. Provides mild corrosion resistance and a black finish. 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. Black OxideĪn extremely thin attractive finish with minimal corrosion resistance. This 1000 hour benchmark is a very high rating in this method.
This finish has been salt spray tested for up to 1000 hours corrosion resistance in a standardized salt spray test. There is not drive slot on the head of the fastener. 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. Phillips/SquareĪ classic drive with the unmistakable straight slot. Also know at the cross-point drive, it one of the most common drives.
#STAINLESS STEEL SCREWS SELF TAPPING PLUS#
PhillipsĪ classic drive with the unmistakable plus sign indentation. It can be tightened with almost any wrench of the correct size. This classic head style features a six sides and a flat top of the head, which is the most common head in all fasteners.
This gives a second option if the drive is stripped. A square bit is used on this drive and it is a called a double because the bit can be inserted two different ways. The head looks like a star with 8 points. 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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