Washer ended thermocouples labfacility fw k 2m washer ended type k thermocouple 350c temperature range cable terminal 2m lead a type j or type k thermocouple housed in a washer eyelet for surface measurement grounded tip for fast thermal response washer with 6mm clearance hole 2m glass fibre stainless steel braided extension lead with twin 702mm wire labfacility fw k 2m washer thermocouple k 2m