Indented Hex Head

10X1 1/2 Slotted Indented Hex Washer With Bonded Neo Epdm Washer F/T Self Piercing Zinc. Concrete screws cut their own threads when used in concrete, block or brick. Carbide bits are recommended for use in masonry. Indented hex washer head offers advantages of hex head, plus greater protection to mating surface.

Machine Screws feature straight shank fasteners with external threads designed to go through a hole or nut that is pre-tapped to form a mating thread for the screw. Fasteners are durably constructed of steel for long lasting reliability and strength.

Tamper Proof Machine Screws are used in areas where prevention of public tampering or vandalism is important. They are distinguished by their unconventional drive styles, which are designed to minimize the possibility of removal. Tamper Proof Screws can be found in schools, public parks, correctional facilities, and many other locations where there is a high level of public activity. Special drivers are needed to install and remove these screws. This Product is Made up of 18-8 Stainless Steel.

B5/16-18 x 5-1/2" Machine Screw - Flat Head - Slotted - Steel - Zinc CR+3 - FT - 100 Pk - BBI 580792 Machine Screws are designed to go through a hole or nut that is pre-tapped to form a mating thread for that screw. Flat head screws are used when protrusion of the fastener above the mating surface is unacceptable.

10-24X1 Phillips Flat 100 Degree Machine Screw Fully Threaded 18 8 Stainless Steel. Machine Screws are designed to go through a hole or nut that is pre-tapped to form a mating thread for that screw. 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.