Windmill Columns, Sockets and Stabilisers

Column threads and sizes
*  BSP Nominal (e.g. 3" BSP Nom = 88mm Nom OD)
*  Wall thickness (WT) is greater than steel WT or standard Polpro pipe (see Catelogue page 4.10.1 for WT)
* Thread lengths (TL) are longer and stronger for long sockets
*  Standard short threads available on request = "Risers"
*  75mm (3") Column now available in Extra Heavy Duty: WT = 15mm (Nominal)