1/2"-13 x 4" ASTM F593 18-8 Stainless Steel Hex Cap Screw / NOMINAL THREAD DIAMETER: 0.5 INCHES THREAD QUANTITY PER INCH: A13 PART NAME ASSIGNED BY CONTROLLING AGENCY: STAINLESS STEEL HEX CAP SCREW SPECIAL FEATURES: 4 INCH LONG/GRADE 18-8;DIA-THREAD SIZE 1/2 INCH-13;PLAIN FINISH;ROHS;COARD THREAD;WRENCH SIZE 3/4 INCH;PRODUCT WEIGHT 0.2567 LBS;USED IN TAPPED HOLE MATERIAL: STEEL CORROSION RESISTING OVERALL