30.5 Mm, Pushbutton, Extended, Red30. 5 Mm, Heavy Duty Pushbutton Operator, Non illuminated, Extended, Red, Momentary, No Light Unit. NEMA Rating: 3, 3R, 4, 4X, 12, 13. The 10250T112 is a red momentary Pushbutton Operator features zinc die cast construction with chrome plated housing and mounting nuts. The switch operator also features with the enclosed silver contacts with reliability nibs, reliability nibs improves contact reliability even under dry circuits and fine dust