Far easier to drill and tap to 3/8" than try to fit a Helicoil or similar.
eBay
304 Stainless Steel Radiators Vent Key Metal Plumbing Bleed Wrench Portable Heating Cross Keys Wrench Repair Tools M4YD
Aliexpress UK
Radiator valve extensions are used where existing pipework doesn't quite stretch to fit where a new radiator is going to be installed various sizes and finishes are available. BSP Threaded. 1/2" Radiator / Tap Valve Extension.
eBay
40-120 Celsius Car 52mm Water Temperature Gauge with Adaptor Joint Pipe Radiator 1/8NPT Sensor Racing Water Tank Level Indicator
Aliexpress UK
BSP Pipe Elbows. BSP Threaded. Hot and cold water. Sanitary installations.
eBay
2x Pipes Radiator Pipe Covers Sleeve 15mm Collars Cut Pipe Decoration Cover Heating Pipe Decoration Ring Angle Valve Decor Ring
Aliexpress UK
Why Choose Our Radiator?. Radiator selection needs to consider factors such as room area, orientation, and insulation. Radiator installation requires a central heating system or independent heating boiler as a heat source.
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WiFi/Zigbee Smart TRV Tuya Heating Radiator Actuator Programmable Thermostatic Head Valve Controller Voice Google Home Alexa
Aliexpress UK
PERKINS ENGINE BLOCK AND RADIATOR TAP 1/4 BSP. Fuel Fittings. Dexta, Major, Power Major, Super Dexta, Super Major. to suit the full range of perkins enignes including ad3.152 ad4.248 1000 series engines also fits.
eBay
Tuya Smart ZigBee 3.0 Thermostat Radiator Valve Smart TRV Thermostatic Valve Temperature Controller Support Alexa Google Home
Aliexpress UK
MG: MGA (1955-62) • MGB (1962-80), if fitted. Sprite / Midget: With 948 cc, 1098 cc and 1275 cc engines (1958-74), if fitted. "Water drain tap". Mini: All models with A-Series engine (1959-80), if fitted.
eBay
Granzon Integrated AIO Pump Radiator Combo 30mm Thickness Copper Computer Water Coolant Heatsink GZMN 240/360mm
Aliexpress UK
RADIATOR HEX KEY. HEAVY DUTY KEY FOR RADIATOR VENT PLUGS AND BLEED SCREWS.
eBay
Ice Tower Heat Sinks Radiator With Silent Fan For Over Clock Bitaxe Gamma Supra Ultra 401 601 Open Source Miners
Aliexpress UK
eBay
Touch Screen Digital Display Thermostat Switch Temperature Controller Timer With Sensor For Electric Towel Heating Rack Radiator
Aliexpress UK