MrGatch Messages 39 Mar 20, 2021 #1 Hi, I've just bought two new plastic covers for cylinder immersion heaters as they are both missing on the cylinder. Does anyone know what the thread size for the small securing nuts that I need to attach the covers to the immersion? Thanks
Hi, I've just bought two new plastic covers for cylinder immersion heaters as they are both missing on the cylinder. Does anyone know what the thread size for the small securing nuts that I need to attach the covers to the immersion? Thanks
ShaunCorbs Super Moderator Staff member S. Mod Plumber Gas Engineer Subscribed Messages 34,400 Solutions 2 Mar 20, 2021 #2 M5 I think Upvote 0 Downvote
C Chuck Esteemed Subscribed Messages 2,983 Mar 20, 2021 #4 Unless the heater is really ancient it'll be a metric thread. Measure the (major) diameter of the post. If it's 5mm try M5, 4mm M4., etc. My guess would be M4 but @ShaunCorbs is right about most things and I don't have an example to hand to measure. Upvote 0 Downvote
Unless the heater is really ancient it'll be a metric thread. Measure the (major) diameter of the post. If it's 5mm try M5, 4mm M4., etc. My guess would be M4 but @ShaunCorbs is right about most things and I don't have an example to hand to measure.