New XK3W Knob XK3W(40) UNC 1/4, AISI 316, Blue NBR 1020734 Height:25.00 mm (0.98")|Knob size:40.00 mm (1.57")|Material:AISI 316|Net weight:61.00 g (0.13 lbs)|Sealing material:Blue NBR|Thread size:UNC 1/4|Thread standard:UNC View