Basic Limit Switch - Plunger Actuated: Type - Basic Limit Switch; Head - Roller Plunger; Operator Configuration - Panel Mount; Head Action - Spring Return, Standard; Poles/Contacts - SPDT 1NO 1NC; Current Rating - nominal - 20A; Force to Operate - 22.22 oz OF; Pre-Travel - max - 0.051 in (1.3mm) PT; Over-Travel - 0.14 in (3.58mm) OT; Contact Rating - 20A 250VAC; Connection - Screw Terminal; Operating Temperature - -13 Deg F (-25 deg C) to 176 deg F (80 deg C); Additional Information - Contact Gap : 0.5mm; Manufacturer Series - A20 Series