Non Grip Nominal 'U' Bolts to BS3974 - with 4 Nuts

 MetricImperialABCD
1/2" = 15mm Pipe size (M8 metric thread)151/23241258
3/4" = 20mm Pipe size (M8 metric thread)203/43751308
1" = 25mm Pipe size (M8 metric thread)2514256308
1.1/4" = 32mm Pipe size (M8 metric thread)321.1/45266308
1.1/2" = 40mm Pipe size (M10 metric thread)401.1/255804010
2" = 50mm Pipe size (M10 metric thread)50270954010
2.1/2" = 65mm Pipe size (M12 metric thread)652.1/2831145012
3" = 80mm Pipe size (M16 metric thread)803941325516
4" = 100mm Pipe size (M16 metric thread)10041241575516
5" = 125mm Pipe size (M16 metric thread12551491825516
6" = 150mm Pipe size (M20 metric thread)15061752156520
8" = 200mm Pipe size (M20 metric thread)20082302656520
10" = 250mm Pipe size (M20 metric thread)2501028532575 20
12" = 300mm Pipe size (M20 metric thread)300123353757520