Basic Limit Switch - Plunger Actuated: Type - Basic Limit Switch; Head - Roller Lever; Operator Configuration - Standard; Head Action - Spring Return, Standard; Poles/Contacts - SPDT; Current Rating - nominal - 20A; Force to Operate - 5.64 oz (1.57N) OF; Pre-Travel - max - 0.25 in (6.35mm) PT; Differential-Travel - max - 0.045 in (1.14mm) DT; Over-Travel - 0.047 in (1.19mm) OT; Contact Rating - 20A 125-250Vac 0.5A 125Vdc 0.25A 250Vdc; Connection - Screw Terminal; Connection Configuration - Bottom Facing Screw w/Cup Washer, M4 x 5.5mm; Operating Temperature - -13 deg F (-25 deg C) to 176 deg F (80 deg C); Construction - Phenolic; Manufacturer Series - A-20 Heavy Duty Series