Looking for replacement gland (stuffing box) for Danfoss RAS-C 013G5023 Thermostatic Radiator Head. (25 years old). Found it at Heatingcontrolsonline as "Danfoss Randall RA Replacement Gland 22B05" at a reasonable price. The pin was stuck in so valve not operating according to temperature. After googling discovered able to unscrew and replace without draining radiator! Result. Might be useful if the actual applicable valves and instructions included on the website. So wound three good turns of PTFE on the threads, and then a twist and a half around the gland head to create a seal under the head, before screwing in and nipping up.