3/8"-16 x 1-1/2" ASTM A574 Hex Drive Zinc Finish Alloy Steel 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-SOCKET HEAD CAP SCREW MATERIAL: STEEL OVERALL SURFACE TREATMENT: ZINC OVERALL THREAD SERIES DESIGNATOR: UNC