3/8"-16 x 4-1/2" ASTM F879 Hex Drive Grade 18-8 Stainless Steel Flat Socket Cap Screw Full Thread / THREAD CLASS: 3A THREAD DIRECTION: RIGHT-HAND FASTENER LENGTH: 4.500 INCHES NOMINAL HEAD STYLE: C50 FLAT COUNTERSUNK NOMINAL THREAD DIAMETER: 0.375 INCHES THREAD QUANTITY PER INCH: 16 COUNTERSINK ANGLE: 82.0 DEGREES NOMINAL MATERIAL: STEEL COMP 304 OVERALL THREAD SERIES DESIGNATOR: UNRC