Hex Washer Slotted Concrete Screw, 1/4 in Dia. x 4 in, Steel, Blue Climaseal Fastener Finish/ FASTENER LENGTH: 4.000 INCHES NOMINAL HEAD STYLE: C7 HEXAGON EXTENDED WASHER NONMACHINE THREAD STYLE: A11 CONE POINT (TYPE BP) NONMACHINE NOMINAL THREAD DIAMETER: 0.250 INCHES PART NAME ASSIGNED BY CONTROLLING AGENCY: RED HEAD MASONRY SCREW, HEX