Product Information Material: Steel Select a Product Part NumberThread SizeBody SizeLength 3KFM1615M16 x 1.53/8"2.44" (62.0mm) 4KFM1815M18 x 1.51/2"2.50" (63.5mm) 4KFM2015M20 x 1.51/2"2.52" (64.0mm) 4KFM2215M22 x 1.51/2"2.52" (64.0mm)