Ametric&reg; S2013 Inch Steel Spur MPB Gear, 14-1/2 Deg 20DP, 13 Teeth, 5/16 Inch +/-1/16" Pilot Bore (B), 3/8" Face Width (F), 1/2 Inch Hub Dia (H), 0.375 Inch Hub Projection (P), 3/4 Inch total width, 0.75 Inch OD, (1-125)