12-24 x 1-1/2" Hex-Unslotted Hex Washer Head Climaseal® #5 Steel Heavy Duty TEKS® Self-Drilling Screw Made in USA / FASTENER LENGTH: 1.5 INCHES NOMINAL HEAD STYLE: C1 HEXAGON POINT STYLE: F35 SELF-DRILLING INTERNAL DRIVE STYLE: D21 W/O INTERNAL DRIVE END ITEM IDENTIFICATION: 2320015312701 NOMINAL THREAD DIAMETER: 0.216 INCHES THREAD QUANTITY PER INCH: 24 MATERIAL: STEEL OVERALL