V-Belt Pulley Bore Type Fixed Bore Material Cast Iron Number of Grooves 1 Bore Dia 5/8 In. Outside Dia 3.75 In. 4L A or AX Belt Pitch Dia 3 In. 4LA or A Belt Pitch Dia 3 In. 5L B or BX Belt Pitch Dia 3.4 In. Fits Shaft Dia 5/8 In. None Bushing Required Construction Web Industry Number BK3658 Keyway Size 0.187 in x 0.093 In. Set Screw Included Yes For Use With 4L A AX 5L B or BX Type V-Belts