Grip 'U' Bolts to BS3974 - with 4 Nuts

 MetricImperialABCD
1/2" = 15mm Pipe size (M8 metric thread)151/22246258
3/4" = 20mm Pipe size (M8 metric thread)203/42756258
1" = 25mm Pipe size (M8 metric thread)2513761258
1.1/4" = 32mm Pipe size (M8 metric thread)321.1/44771258
1.1/2" = 40mm Pipe size (M10 metric thread)401.1/250853510
2" = 50mm Pipe size (M10 metric thread)50265953510
2.1/2" = 65mm Pipe size (M12 metric thread)652.1/2781244512
3" = 80mm Pipe size (M16 metric thread)803891425016
4" = 100mm Pipe size (M16 metric thread)10041191675016
5" = 125mm Pipe size (M16 metric thread12551441925016
6" = 150mm Pipe size (M20 metric thread)15061702255520
8" = 200mm Pipe size (M20 metric thread)20082252855520
10" = 250mm Pipe size (M20 metric thread)250102803406020
12" = 300mm Pipe size (M20 metric thread)300123303906020