M20-2.5 x 40mm DIN 7991 Hex Drive Grade A2-70 Stainless Steel Flat Socket Cap Screw / THREAD DIRECTION: RIGHT-HAND FASTENER LENGTH: 40.0 MILLIMETERS NOMINAL HEAD STYLE: C115 TORX EXTENDED WASHER INTERNAL DRIVE STYLE: D5 HEXAGON NOMINAL THREAD DIAMETER: 20.0 MILLIMETERS PART NAME ASSIGNED BY CONTROLLING AGENCY: FLAT SOCKET CAP SCREW SPECIAL FEATURES: MATERIAL- STAINLESS STEEL, FINISH- PLAIN, DRIVE SIZE-12MM, WEIGHT- 0.225, THREAD- COARSE, GRADEA2-70 THREAD SERIES DESIGNATOR: ISO M