... Tolerance on Outside Diameter, Wall Thickness, Theoretical Weight of type M copper tube Type MNominal Size,inchActual Outside Diameter,inchTolerance on ... .0050.0020.0720.0072.686.Application:-Copper tubes of type M are used for interior domestic water, service and distribution, ... flare fittings. Available in soft and hard types.-Annealed type M copper tube is suitable for use with flare or compression ...