5/16-18X2 1/2 Six Lobe Pan Floor Board Screw Type F Fully Threaded Black Phosphate, Pkg of 300

1/4-20X1 1/4 Six Lobe Flat Thread Cutting Screw Type F Fully Threaded Zinc Bake. Thread-Cutting Type-F threaded screws are used in heavy gauge sheet metal, aluminum, zinc and lead die castings, cast iron, brass and plastic. In stainless steel, material into which the screw is to cut threads should have a lower hardness by 10-20 Rockwell hardness. Flat head screws are used when protrusion of the fastener above the mating surface is unacceptable. Typically 100 degree flat or for fastening softer materials, 82 degrees flat.

1/4-20X2 1/2 Six Lobe Flat Floor Board Screw Type F Black Phosphate. Thread-Cutting Type-F threaded screws are used in heavy gauge sheet metal, aluminum, zinc and lead die castings, cast iron, brass and plastic. In stainless steel, material into which the screw is to cut threads should have a lower hardness by 10-20 Rockwell hardness. Flat head screws are used when protrusion of the fastener above the mating surface is unacceptable. Typically 100 degree flat or for fastening softer materials, 82 degrees flat.

1/4-20X3/4 Six Lobe Flat Floor Board Screw Type F Black Phosphate. Thread-Cutting Type-F threaded screws are used in heavy gauge sheet metal, aluminum, zinc and lead die castings, cast iron, brass and plastic. In stainless steel, material into which the screw is to cut threads should have a lower hardness by 10-20 Rockwell hardness. Flat head screws are used when protrusion of the fastener above the mating surface is unacceptable. Typically 100 degree flat or for fastening softer materials, 82 degrees flat.

Fine Thread Drywall Screws are used to secure drywall to 20-25 gauge steel. Their sharp, self piercing point allows for easy penetration, and their fine threads provide a strong hold. They feature a countersunk bugle head that tapers down into the drywall after installation to provide a clean, finished look. They are manufactured to the ASTM C1002 standard and are finished in a black phosphate coating. Features: Double Lead Threads It is made up of Carbon Steel Countersunk Head for Clean Finish Self Piercing

9X2 Phillips Recess Bugle Hd Coarse Thread Drywall Scr Blk Phosphate Particle Board. Bugle head screws are commonly used for drywall because it distributes bearing stress over a wider area than a flat head.