Standard worm-drive hose clips to BS5315 available in either BZP steel or A2 grade 18//8 stainless steel Clips are marked with BS kitemark and appropriate BS size number Clips are 13mm wide, except for 12-20mm sizes which are 10mm wide 7mm slotted hexagonal adjustment screw Recommended tightening torque is dependent upon clip size as follows: 12-20mm=3Nm 22-45mm=6Nm 50-220mm=6Nm