These spiral clamps are designed to fit between the corrugations found on PVC transfer hose (not designed for critical applications). Our N675 are suitable for a clockwise helix (right hand thread) while our N676 are suitable for counter-clockwise (left hand thread). They will not interchange, so it is important to note which way the helix spirals on the hose (not all manufacturers spiral their hoses in the same direction).One clamp per end for sizes up to 6", 2 clamps per end for higher pressure applications 6" and above.

Warning: Always inspect/tighten bolt style clamps before each use