3/8"-16 x 1/2" ASTM F879 Hex Drive 18-8 Stainless Steel Button Socket Cap Screw / THREAD DIRECTION: RIGHT-HAND NOMINAL THREAD DIAMETER: 0.375 INCHES THREAD QUANTITY PER INCH: 16 PART NAME ASSIGNED BY CONTROLLING AGENCY: FASTENER-BUTTON SOCKET CAP SCREW MATERIAL: STEEL PROPERTY CLASS 18.8 OVERALL THREAD SERIES DESIGNATOR: UNC