Apem seal caps for togglepushbutton switches full and half apem u1341 1 the apem seal cap u1341 full with knurled nut nickel coated black is an excellent solution for preventing dust sand and water from getting into switches while in cold weather it also prevents ice from blocking lever action suitable for bushing apem series 5500 switches apem u1341 1 seal cap full with knurled nut nickel coated black