6 x 1 in. Flat Head Black, Phillips - Qty:100

6 x 1 in. Flat Head Black, Phillips - Qty:100

Black screws are a nice finish for both decorative and functionality.

The black finish comes from a chemical "conversion coating" for metal where the surface is subjected to an electrochemical or chemical process leaving a coating on the metal and converting it into a protective and decorative coating. This process does add an additional level of mild corrosion resistance along with the aesthetic or decorative appearance as well as minimizing the reflection of light off of the surface.

Deep Thread: Characterized by a reduced diameter shank resulting in a deep thread profile. A single lead thread, meaning that one revolution advances the screw one pitch. (Pitch is equal to 1 divided by the number of threads per inch. For a screw with 10 threads per in., one revolution will advance the screw 1/1O in. into the wood.)

The deep thread form provides superior resistance to pull-out. This design feature is commonly called a Lo-Root® or Production Screw.

The Phillips Recess remains very popular in the woodworking industry. It provides a much more positive fit than slotted screws and requires about 12-foot pounds of pressure to keep the driver engaged in the recess. There is also more "cam out" (driver bit slippage) that occurs when compared to square drive screws which offer a more positive bit engagement. This "cam out" was a part of the design feature to prevent overtightening of the fastener. This was described as a feature in the refinement Patent of 1949.