Grounding Screw, Grounding Accessories, Zinc Steel, Green/ THREAD DIRECTION: RIGHT-HAND FASTENER LENGTH: 0.375 INCHES NOMINAL HEAD STYLE: A1 HEXAGON PART NAME ASSIGNED BY CONTROLLING AGENCY: GROUND SCREW, FOUR WAY SLOTTED SCREW MATERIAL: STEEL SPECIAL FEATURES: THREAD SIZE: 10-32; FOR GROUND NUMBER 32 TO NUMBER 10 AWG WIRE