1/4"-28 x 1-1/2" ASTM F879 Hex Drive Grade 18-8 Stainless Steel Flat Socket Cap Screw Full Thread / THREAD DIRECTION: RIGHT-HAND FASTENER LENGTH: 1.500 INCHES NOMINAL HEAD STYLE: C50 FLAT COUNTERSUNK INTERNAL DRIVE STYLE: D5 HEXAGON NOMINAL THREAD DIAMETER: 0.250 INCHES THREAD QUANTITY PER INCH: 28 MATERIAL: STEEL PROPERTY CLASS 18.8 OVERALL THREAD SERIES DESIGNATOR: UNF