A kind of female Luer comprises the outer rigid housing with first end and second end.Shell also is included in rigid tubular male portion and the rigid tubular female portion on second end on first end and passes wherein longitudinal opening.Male portion is configured to and can engages with female joint.Female portion be configured to engage and to prevent with male joint male joint and female the part from.In some embodiments, female portion is configured to the turned position that is maintained fixed when male joint just is threaded with it, in case and male joint engages fully with female portion, just rotate with male joint, with prevent male joint and female part from.
