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NOMINAL BORE TUBE MEDIUM BS 1387: 1985

Available in self colour, black, or galvanised – Screwed and Socketed or plain end

Nominal Bore (mm)	Outside Diameter (mm)	Thickness (mm)
8	13.3 to 13.9	2.35
10	16.8 to 17.4	2.35
15	21.1 to 21.7	2.65
20	26.6 to 27.2	2.65
25	33.4 to 34.2	3.25
32	40.1 to 42.9	3.25
40	48.0 to 48.8	3.25
50	59.8 to 60.8	3.65
65	75.4 to 76.6	3.65
80	88.1 to 89.5	4.05
100	113.3 to 114.9	4.05
125	138.7 to 140.6	4.85
150	164.1 to 166.1	4.85