BS EN 4552:2015 specifies the characteristics of swivel nuts for inch series pipe couplings, 37°, in heat resisting
steel, for aerospace applications.Nominal pressure: Class D in accordance with ISO 6771.Cross References:EN 2424EN 3468EN 3487EN 4549EN 4550-1EN 4560ISO 3161ISO 6771All current amendments available at time of purchase are included with the purchase of this document.